Merge tag 'rtc-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"There is nothing scary this cycle, mostly driver fixes and updates.
The core fix has been in for a while and has been tested on multiple
kernel revisions by multiple teams.
Core:
- Fix setting the alarm to the next expiring timer
New drivers:
- Mediatek MT7622 RTC
- NXP PCF85363
- Spreadtrum SC27xx PMIC RTC
Drivers updates:
- Use generic nvmem to expose the Non volatile ram for ds1305,
ds1511, m48t86 and omap
- abx80x: solve possible race condition at probe
- armada38x: support trimming the RTC oscillator
- at91rm9200: fix reading the alarm value at boot
- ds1511: allow waking platform
- m41t80: rework square wave output
- pcf8523: support trimming the RTC oscillator
- pcf8563: fix clock output rate
- pl031: make interrupt optional
- xgene: fix suspend/resume"
* tag 'rtc-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (50 commits)
dt-bindings: rtc: imxdi: Improve the bindings text
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver
dt-bindings: rtc: Add Spreadtrum SC27xx RTC documentation
rtc: at91rm9200: fix reading alarm value
rtc: at91rm9200: stop calculating yday in at91_rtc_readalarm
rtc: sysfs: Use time64_t variables to set time/alarm
rtc: xgene: mark PM functions as __maybe_unused
rtc: xgene: Fix suspend/resume
rtc: pcf8563: don't alway enable the alarm
rtc: pcf8563: fix output clock rate
rtc: rx8010: Fix for incorrect return value
rtc: rx8010: Specify correct address for RX8010_RESV31
rtc: rx8010: Remove duplicate define
rtc: m41t80: remove unneeded checks from m41t80_sqw_set_rate
rtc: m41t80: avoid i2c read in m41t80_sqw_is_prepared
rtc: m41t80: avoid i2c read in m41t80_sqw_recalc_rate
rtc: m41t80: fix m41t80_sqw_round_rate return value
rtc: m41t80: m41t80_sqw_set_rate should return 0 on success
rtc: add support for NXP PCF85363 real-time clock
rtc: omap: Support scratch registers
...
diff --git a/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt b/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
index 323cf26..c797bc9 100644
--- a/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
@@ -1,20 +1,20 @@
* i.MX25 Real Time Clock controller
-This binding supports the following chips: i.MX25, i.MX53
-
Required properties:
- compatible: should be: "fsl,imx25-rtc"
- reg: physical base address of the controller and length of memory mapped
region.
+- clocks: should contain the phandle for the rtc clock
- interrupts: rtc alarm interrupt
Optional properties:
-- interrupts: dryice security violation interrupt
+- interrupts: dryice security violation interrupt (second entry)
Example:
-rtc@80056000 {
- compatible = "fsl,imx53-rtc", "fsl,imx25-rtc";
- reg = <0x80056000 2000>;
- interrupts = <29 56>;
+rtc@53ffc000 {
+ compatible = "fsl,imx25-rtc";
+ reg = <0x53ffc000 0x4000>;
+ clocks = <&clks 81>;
+ interrupts = <25 56>;
};
diff --git a/Documentation/devicetree/bindings/rtc/pcf85363.txt b/Documentation/devicetree/bindings/rtc/pcf85363.txt
new file mode 100644
index 0000000..76fdabc
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/pcf85363.txt
@@ -0,0 +1,17 @@
+NXP PCF85363 Real Time Clock
+============================
+
+Required properties:
+- compatible: Should contain "nxp,pcf85363".
+- reg: I2C address for chip.
+
+Optional properties:
+- interrupts: IRQ line for the RTC (not implemented).
+
+Example:
+
+pcf85363: pcf85363@51 {
+ compatible = "nxp,pcf85363";
+ reg = <0x51>;
+};
+
diff --git a/Documentation/devicetree/bindings/rtc/rtc-mt7622.txt b/Documentation/devicetree/bindings/rtc/rtc-mt7622.txt
new file mode 100644
index 0000000..09fe8f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-mt7622.txt
@@ -0,0 +1,21 @@
+Device-Tree bindings for MediaTek SoC based RTC
+
+Required properties:
+- compatible : Should be
+ "mediatek,mt7622-rtc", "mediatek,soc-rtc" : for MT7622 SoC
+- reg : Specifies base physical address and size of the registers;
+- interrupts : Should contain the interrupt for RTC alarm;
+- clocks : Specifies list of clock specifiers, corresponding to
+ entries in clock-names property;
+- clock-names : Should contain "rtc" entries
+
+Example:
+
+rtc: rtc@10212800 {
+ compatible = "mediatek,mt7622-rtc",
+ "mediatek,soc-rtc";
+ reg = <0 0x10212800 0 0x200>;
+ interrupts = <GIC_SPI 129 IRQ_TYPE_LEVEL_LOW>;
+ clocks = <&topckgen CLK_TOP_RTC>;
+ clock-names = "rtc";
+};
diff --git a/Documentation/devicetree/bindings/rtc/sprd,sc27xx-rtc.txt b/Documentation/devicetree/bindings/rtc/sprd,sc27xx-rtc.txt
new file mode 100644
index 0000000..7c170da
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/sprd,sc27xx-rtc.txt
@@ -0,0 +1,27 @@
+Spreadtrum SC27xx Real Time Clock
+
+Required properties:
+- compatible: should be "sprd,sc2731-rtc".
+- reg: address offset of rtc register.
+- interrupt-parent: phandle for the interrupt controller.
+- interrupts: rtc alarm interrupt.
+
+Example:
+
+ sc2731_pmic: pmic@0 {
+ compatible = "sprd,sc2731";
+ reg = <0>;
+ spi-max-frequency = <26000000>;
+ interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@280 {
+ compatible = "sprd,sc2731-rtc";
+ reg = <0x280>;
+ interrupt-parent = <&sc2731_pmic>;
+ interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/trivial-devices.txt b/Documentation/devicetree/bindings/trivial-devices.txt
index 678039d..5f3143f 100644
--- a/Documentation/devicetree/bindings/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/trivial-devices.txt
@@ -72,7 +72,6 @@
maxim,max1237 Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
maxim,max6621 PECI-to-I2C translator for PECI-to-SMBus/I2C protocol conversion
maxim,max6625 9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface
-mc,rv3029c2 Real Time Clock Module with I2C-Bus
mcube,mc3230 mCube 3-axis 8-bit digital accelerometer
memsic,mxc6225 MEMSIC 2-axis 8-bit digital accelerometer
microchip,mcp4531-502 Microchip 7-bit Single I2C Digital Potentiometer (5k)
@@ -141,6 +140,7 @@
microchip,mcp4662-104 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (100k)
microchip,tc654 PWM Fan Speed Controller With Fan Fault Detection
microchip,tc655 PWM Fan Speed Controller With Fan Fault Detection
+microcrystal,rv3029 Real Time Clock Module with I2C-Bus
miramems,da226 MiraMEMS DA226 2-axis 14-bit digital accelerometer
miramems,da280 MiraMEMS DA280 3-axis 14-bit digital accelerometer
miramems,da311 MiraMEMS DA311 3-axis 12-bit digital accelerometer
diff --git a/MAINTAINERS b/MAINTAINERS
index 44512c3..aa71ab52f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1590,10 +1590,13 @@
ARM/Mediatek RTC DRIVER
M: Eddie Huang <eddie.huang@mediatek.com>
+M: Sean Wang <sean.wang@mediatek.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
S: Maintained
+F: Documentation/devicetree/bindings/rtc/rtc-mt7622.txt
F: drivers/rtc/rtc-mt6397.c
+F: drivers/rtc/rtc-mt7622.c
ARM/Mediatek SoC support
M: Matthias Brugger <matthias.bgg@gmail.com>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index e0e58f3..b59a31b 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -433,6 +433,19 @@
This driver can also be built as a module. If so, the module
will be called rtc-pcf85063.
+config RTC_DRV_PCF85363
+ tristate "NXP PCF85363"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the PCF85363 RTC chip.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-pcf85363.
+
+ The nvmem interface will be named pcf85363-#, where # is the
+ zero-based instance number.
+
config RTC_DRV_PCF8563
tristate "Philips PCF8563/Epson RTC8564"
help
@@ -1174,6 +1187,17 @@
This driver can also be built as a module. If so, the module
will be called "rtc-wm8350".
+config RTC_DRV_SC27XX
+ tristate "Spreadtrum SC27xx RTC"
+ depends on MFD_SC27XX_PMIC || COMPILE_TEST
+ help
+ If you say Y here you will get support for the RTC subsystem
+ of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs
+ includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-sc27xx.
+
config RTC_DRV_SPEAR
tristate "SPEAR ST RTC"
depends on PLAT_SPEAR || COMPILE_TEST
@@ -1706,14 +1730,24 @@
will be called rtc-moxart
config RTC_DRV_MT6397
- tristate "Mediatek Real Time Clock driver"
+ tristate "MediaTek PMIC based RTC"
depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
help
- This selects the Mediatek(R) RTC driver. RTC is part of Mediatek
+ This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
MT6397 PMIC. You should enable MT6397 PMIC MFD before select
- Mediatek(R) RTC driver.
+ MediaTek(R) RTC driver.
- If you want to use Mediatek(R) RTC interface, select Y or M here.
+ If you want to use MediaTek(R) RTC interface, select Y or M here.
+
+config RTC_DRV_MT7622
+ tristate "MediaTek SoC based RTC"
+ depends on ARCH_MEDIATEK || COMPILE_TEST
+ help
+ This enables support for the real time clock built in the MediaTek
+ SoCs.
+
+ This drive can also be built as a module. If so, the module
+ will be called rtc-mt7622.
config RTC_DRV_XGENE
tristate "APM X-Gene RTC"
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 0bf1fc0..f2f50c1 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -103,6 +103,7 @@
obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
obj-$(CONFIG_RTC_DRV_MT6397) += rtc-mt6397.o
+obj-$(CONFIG_RTC_DRV_MT7622) += rtc-mt7622.o
obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o
obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o
obj-$(CONFIG_RTC_DRV_NUC900) += rtc-nuc900.o
@@ -114,6 +115,7 @@
obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o
obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o
obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o
+obj-$(CONFIG_RTC_DRV_PCF85363) += rtc-pcf85363.o
obj-$(CONFIG_RTC_DRV_PCF8523) += rtc-pcf8523.o
obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o
@@ -144,6 +146,7 @@
obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o
obj-$(CONFIG_RTC_DRV_S5M) += rtc-s5m.o
obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o
+obj-$(CONFIG_RTC_DRV_SC27XX) += rtc-sc27xx.o
obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o
obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o
obj-$(CONFIG_RTC_DRV_SNVS) += rtc-snvs.o
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 8cec9a0..672b192 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -779,7 +779,7 @@
}
timerqueue_add(&rtc->timerqueue, &timer->node);
- if (!next) {
+ if (!next || ktime_before(timer->node.expires, next->expires)) {
struct rtc_wkalrm alarm;
int err;
alarm.time = rtc_ktime_to_tm(timer->node.expires);
@@ -1004,6 +1004,10 @@
* to compensate for differences in the actual clock rate due to temperature,
* the crystal, capacitor, etc.
*
+ * The adjustment applied is as follows:
+ * t = t0 * (1 + offset * 1e-9)
+ * where t0 is the measured length of 1 RTC second with offset = 0
+ *
* Kernel interface to adjust an rtc clock offset.
* Return 0 on success, or a negative number on error.
* If the rtc offset is not setable (or not implemented), return -EINVAL
diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index fea9a60..b033bc5 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -614,12 +614,12 @@
if (err)
return err;
- rtc = devm_rtc_device_register(&client->dev, "abx8xx",
- &abx80x_rtc_ops, THIS_MODULE);
-
+ rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
+ rtc->ops = &abx80x_rtc_ops;
+
i2c_set_clientdata(client, rtc);
if (client->irq > 0) {
@@ -646,10 +646,14 @@
err = devm_add_action_or_reset(&client->dev,
rtc_calib_remove_sysfs_group,
&client->dev);
- if (err)
+ if (err) {
dev_err(&client->dev,
"Failed to add sysfs cleanup action: %d\n",
err);
+ return err;
+ }
+
+ err = rtc_register_device(rtc);
return err;
}
diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c
index 21f355c..1e4978c 100644
--- a/drivers/rtc/rtc-armada38x.c
+++ b/drivers/rtc/rtc-armada38x.c
@@ -28,6 +28,8 @@
#define RTC_IRQ_AL_EN BIT(0)
#define RTC_IRQ_FREQ_EN BIT(1)
#define RTC_IRQ_FREQ_1HZ BIT(2)
+#define RTC_CCR 0x18
+#define RTC_CCR_MODE BIT(15)
#define RTC_TIME 0xC
#define RTC_ALARM1 0x10
@@ -343,18 +345,117 @@
return IRQ_HANDLED;
}
+/*
+ * The information given in the Armada 388 functional spec is complex.
+ * They give two different formulas for calculating the offset value,
+ * but when considering "Offset" as an 8-bit signed integer, they both
+ * reduce down to (we shall rename "Offset" as "val" here):
+ *
+ * val = (f_ideal / f_measured - 1) / resolution where f_ideal = 32768
+ *
+ * Converting to time, f = 1/t:
+ * val = (t_measured / t_ideal - 1) / resolution where t_ideal = 1/32768
+ *
+ * => t_measured / t_ideal = val * resolution + 1
+ *
+ * "offset" in the RTC interface is defined as:
+ * t = t0 * (1 + offset * 1e-9)
+ * where t is the desired period, t0 is the measured period with a zero
+ * offset, which is t_measured above. With t0 = t_measured and t = t_ideal,
+ * offset = (t_ideal / t_measured - 1) / 1e-9
+ *
+ * => t_ideal / t_measured = offset * 1e-9 + 1
+ *
+ * so:
+ *
+ * offset * 1e-9 + 1 = 1 / (val * resolution + 1)
+ *
+ * We want "resolution" to be an integer, so resolution = R * 1e-9, giving
+ * offset = 1e18 / (val * R + 1e9) - 1e9
+ * val = (1e18 / (offset + 1e9) - 1e9) / R
+ * with a common transformation:
+ * f(x) = 1e18 / (x + 1e9) - 1e9
+ * offset = f(val * R)
+ * val = f(offset) / R
+ *
+ * Armada 38x supports two modes, fine mode (954ppb) and coarse mode (3815ppb).
+ */
+static long armada38x_ppb_convert(long ppb)
+{
+ long div = ppb + 1000000000L;
+
+ return div_s64(1000000000000000000LL + div / 2, div) - 1000000000L;
+}
+
+static int armada38x_rtc_read_offset(struct device *dev, long *offset)
+{
+ struct armada38x_rtc *rtc = dev_get_drvdata(dev);
+ unsigned long ccr, flags;
+ long ppb_cor;
+
+ spin_lock_irqsave(&rtc->lock, flags);
+ ccr = rtc->data->read_rtc_reg(rtc, RTC_CCR);
+ spin_unlock_irqrestore(&rtc->lock, flags);
+
+ ppb_cor = (ccr & RTC_CCR_MODE ? 3815 : 954) * (s8)ccr;
+ /* ppb_cor + 1000000000L can never be zero */
+ *offset = armada38x_ppb_convert(ppb_cor);
+
+ return 0;
+}
+
+static int armada38x_rtc_set_offset(struct device *dev, long offset)
+{
+ struct armada38x_rtc *rtc = dev_get_drvdata(dev);
+ unsigned long ccr = 0;
+ long ppb_cor, off;
+
+ /*
+ * The maximum ppb_cor is -128 * 3815 .. 127 * 3815, but we
+ * need to clamp the input. This equates to -484270 .. 488558.
+ * Not only is this to stop out of range "off" but also to
+ * avoid the division by zero in armada38x_ppb_convert().
+ */
+ offset = clamp(offset, -484270L, 488558L);
+
+ ppb_cor = armada38x_ppb_convert(offset);
+
+ /*
+ * Use low update mode where possible, which gives a better
+ * resolution of correction.
+ */
+ off = DIV_ROUND_CLOSEST(ppb_cor, 954);
+ if (off > 127 || off < -128) {
+ ccr = RTC_CCR_MODE;
+ off = DIV_ROUND_CLOSEST(ppb_cor, 3815);
+ }
+
+ /*
+ * Armada 388 requires a bit pattern in bits 14..8 depending on
+ * the sign bit: { 0, ~S, S, S, S, S, S }
+ */
+ ccr |= (off & 0x3fff) ^ 0x2000;
+ rtc_delayed_write(ccr, rtc, RTC_CCR);
+
+ return 0;
+}
+
static const struct rtc_class_ops armada38x_rtc_ops = {
.read_time = armada38x_rtc_read_time,
.set_time = armada38x_rtc_set_time,
.read_alarm = armada38x_rtc_read_alarm,
.set_alarm = armada38x_rtc_set_alarm,
.alarm_irq_enable = armada38x_rtc_alarm_irq_enable,
+ .read_offset = armada38x_rtc_read_offset,
+ .set_offset = armada38x_rtc_set_offset,
};
static const struct rtc_class_ops armada38x_rtc_ops_noirq = {
.read_time = armada38x_rtc_read_time,
.set_time = armada38x_rtc_set_time,
.read_alarm = armada38x_rtc_read_alarm,
+ .read_offset = armada38x_rtc_read_offset,
+ .set_offset = armada38x_rtc_set_offset,
};
static const struct armada38x_rtc_data armada38x_data = {
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index e221b78..de81ece 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -42,8 +42,6 @@
#define at91_rtc_write(field, val) \
writel_relaxed((val), at91_rtc_regs + field)
-#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
-
struct at91_rtc_config {
bool use_shadow_imr;
};
@@ -51,7 +49,6 @@
static const struct at91_rtc_config *at91_rtc_config;
static DECLARE_COMPLETION(at91_rtc_updated);
static DECLARE_COMPLETION(at91_rtc_upd_rdy);
-static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
static void __iomem *at91_rtc_regs;
static int irq;
static DEFINE_SPINLOCK(at91_rtc_lock);
@@ -131,8 +128,7 @@
/*
* The Calendar Alarm register does not have a field for
- * the year - so these will return an invalid value. When an
- * alarm is set, at91_alarm_year will store the current year.
+ * the year - so these will return an invalid value.
*/
tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
@@ -208,15 +204,14 @@
struct rtc_time *tm = &alrm->time;
at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm);
- tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
- tm->tm_year = at91_alarm_year - 1900;
+ tm->tm_year = -1;
alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)
? 1 : 0;
- dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
- 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
+ dev_dbg(dev, "%s(): %02d-%02d %02d:%02d:%02d %sabled\n", __func__,
+ tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
+ alrm->enabled ? "en" : "dis");
return 0;
}
@@ -230,8 +225,6 @@
at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm);
- at91_alarm_year = tm.tm_year;
-
tm.tm_mon = alrm->time.tm_mon;
tm.tm_mday = alrm->time.tm_mday;
tm.tm_hour = alrm->time.tm_hour;
@@ -255,7 +248,7 @@
}
dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
- at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
+ tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
tm.tm_min, tm.tm_sec);
return 0;
diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c
index 72b2293..d8df2e9 100644
--- a/drivers/rtc/rtc-ds1305.c
+++ b/drivers/rtc/rtc-ds1305.c
@@ -514,56 +514,43 @@
spi_message_add_tail(x, m);
}
-static ssize_t
-ds1305_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1305_nvram_read(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct spi_device *spi;
+ struct ds1305 *ds1305 = priv;
+ struct spi_device *spi = ds1305->spi;
u8 addr;
struct spi_message m;
struct spi_transfer x[2];
- int status;
-
- spi = to_spi_device(kobj_to_dev(kobj));
addr = DS1305_NVRAM + off;
msg_init(&m, x, &addr, count, NULL, buf);
- status = spi_sync(spi, &m);
- if (status < 0)
- dev_err(&spi->dev, "nvram %s error %d\n", "read", status);
- return (status < 0) ? status : count;
+ return spi_sync(spi, &m);
}
-static ssize_t
-ds1305_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1305_nvram_write(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct spi_device *spi;
+ struct ds1305 *ds1305 = priv;
+ struct spi_device *spi = ds1305->spi;
u8 addr;
struct spi_message m;
struct spi_transfer x[2];
- int status;
-
- spi = to_spi_device(kobj_to_dev(kobj));
addr = (DS1305_WRITE | DS1305_NVRAM) + off;
msg_init(&m, x, &addr, count, buf, NULL);
- status = spi_sync(spi, &m);
- if (status < 0)
- dev_err(&spi->dev, "nvram %s error %d\n", "write", status);
- return (status < 0) ? status : count;
+ return spi_sync(spi, &m);
}
-static struct bin_attribute nvram = {
- .attr.name = "nvram",
- .attr.mode = S_IRUGO | S_IWUSR,
- .read = ds1305_nvram_read,
- .write = ds1305_nvram_write,
- .size = DS1305_NVRAM_LEN,
+static struct nvmem_config ds1305_nvmem_cfg = {
+ .name = "ds1305_nvram",
+ .word_size = 1,
+ .stride = 1,
+ .size = DS1305_NVRAM_LEN,
+ .reg_read = ds1305_nvram_read,
+ .reg_write = ds1305_nvram_write,
};
/*----------------------------------------------------------------------*/
@@ -708,10 +695,19 @@
dev_dbg(&spi->dev, "AM/PM\n");
/* register RTC ... from here on, ds1305->ctrl needs locking */
- ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305",
- &ds1305_ops, THIS_MODULE);
+ ds1305->rtc = devm_rtc_allocate_device(&spi->dev);
if (IS_ERR(ds1305->rtc)) {
- status = PTR_ERR(ds1305->rtc);
+ return PTR_ERR(ds1305->rtc);
+ }
+
+ ds1305->rtc->ops = &ds1305_ops;
+
+ ds1305_nvmem_cfg.priv = ds1305;
+ ds1305->rtc->nvmem_config = &ds1305_nvmem_cfg;
+ ds1305->rtc->nvram_old_abi = true;
+
+ status = rtc_register_device(ds1305->rtc);
+ if (status) {
dev_dbg(&spi->dev, "register rtc --> %d\n", status);
return status;
}
@@ -734,12 +730,6 @@
}
}
- /* export NVRAM */
- status = sysfs_create_bin_file(&spi->dev.kobj, &nvram);
- if (status < 0) {
- dev_err(&spi->dev, "register nvram --> %d\n", status);
- }
-
return 0;
}
@@ -747,8 +737,6 @@
{
struct ds1305 *ds1305 = spi_get_drvdata(spi);
- sysfs_remove_bin_file(&spi->dev.kobj, &nvram);
-
/* carefully shut down irq and workqueue, if present */
if (spi->irq) {
set_bit(FLAG_EXITING, &ds1305->flags);
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index e7d9215..923dde9 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -325,6 +325,10 @@
.compatible = "isil,isl12057",
.data = (void *)ds_1337
},
+ {
+ .compatible = "epson,rx8130",
+ .data = (void *)rx_8130
+ },
{ }
};
MODULE_DEVICE_TABLE(of, ds1307_of_match);
@@ -348,6 +352,7 @@
{ .id = "PT7C4338", .driver_data = ds_1307 },
{ .id = "RX8025", .driver_data = rx_8025 },
{ .id = "ISL12057", .driver_data = ds_1337 },
+ { .id = "RX8130", .driver_data = rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(acpi, ds1307_acpi_ids);
@@ -787,8 +792,6 @@
* Alarm support for mcp794xx devices.
*/
-#define MCP794XX_REG_WEEKDAY 0x3
-#define MCP794XX_REG_WEEKDAY_WDAY_MASK 0x7
#define MCP794XX_REG_CONTROL 0x07
# define MCP794XX_BIT_ALM0_EN 0x10
# define MCP794XX_BIT_ALM1_EN 0x20
@@ -877,15 +880,38 @@
return 0;
}
+/*
+ * We may have a random RTC weekday, therefore calculate alarm weekday based
+ * on current weekday we read from the RTC timekeeping regs
+ */
+static int mcp794xx_alm_weekday(struct device *dev, struct rtc_time *tm_alarm)
+{
+ struct rtc_time tm_now;
+ int days_now, days_alarm, ret;
+
+ ret = ds1307_get_time(dev, &tm_now);
+ if (ret)
+ return ret;
+
+ days_now = div_s64(rtc_tm_to_time64(&tm_now), 24 * 60 * 60);
+ days_alarm = div_s64(rtc_tm_to_time64(tm_alarm), 24 * 60 * 60);
+
+ return (tm_now.tm_wday + days_alarm - days_now) % 7 + 1;
+}
+
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned char regs[10];
- int ret;
+ int wday, ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
+ wday = mcp794xx_alm_weekday(dev, &t->time);
+ if (wday < 0)
+ return wday;
+
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
"enabled=%d pending=%d\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
@@ -902,7 +928,7 @@
regs[3] = bin2bcd(t->time.tm_sec);
regs[4] = bin2bcd(t->time.tm_min);
regs[5] = bin2bcd(t->time.tm_hour);
- regs[6] = bin2bcd(t->time.tm_wday + 1);
+ regs[6] = wday;
regs[7] = bin2bcd(t->time.tm_mday);
regs[8] = bin2bcd(t->time.tm_mon + 1);
@@ -1354,14 +1380,12 @@
{
struct ds1307 *ds1307;
int err = -ENODEV;
- int tmp, wday;
+ int tmp;
const struct chip_desc *chip;
bool want_irq;
bool ds1307_can_wakeup_device = false;
unsigned char regs[8];
struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev);
- struct rtc_time tm;
- unsigned long timestamp;
u8 trickle_charger_setup = 0;
ds1307 = devm_kzalloc(&client->dev, sizeof(struct ds1307), GFP_KERNEL);
@@ -1641,25 +1665,6 @@
bin2bcd(tmp));
}
- /*
- * Some IPs have weekday reset value = 0x1 which might not correct
- * hence compute the wday using the current date/month/year values
- */
- ds1307_get_time(ds1307->dev, &tm);
- wday = tm.tm_wday;
- timestamp = rtc_tm_to_time64(&tm);
- rtc_time64_to_tm(timestamp, &tm);
-
- /*
- * Check if reset wday is different from the computed wday
- * If different then set the wday which we computed using
- * timestamp
- */
- if (wday != tm.tm_wday)
- regmap_update_bits(ds1307->regmap, MCP794XX_REG_WEEKDAY,
- MCP794XX_REG_WEEKDAY_WDAY_MASK,
- tm.tm_wday + 1);
-
if (want_irq || ds1307_can_wakeup_device) {
device_set_wakeup_capable(ds1307->dev, true);
set_bit(HAS_ALARM, &ds1307->flags);
diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c
index aa0d2c6..4d5b007 100644
--- a/drivers/rtc/rtc-ds1390.c
+++ b/drivers/rtc/rtc-ds1390.c
@@ -216,9 +216,16 @@
return res;
}
+static const struct of_device_id ds1390_of_match[] = {
+ { .compatible = "dallas,ds1390" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ds1390_of_match);
+
static struct spi_driver ds1390_driver = {
.driver = {
.name = "rtc-ds1390",
+ .of_match_table = of_match_ptr(ds1390_of_match),
},
.probe = ds1390_probe,
};
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 1b2dcb5..1e95312 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -398,42 +398,37 @@
.alarm_irq_enable = ds1511_rtc_alarm_irq_enable,
};
-static ssize_t
-ds1511_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *ba,
- char *buf, loff_t pos, size_t size)
+static int ds1511_nvram_read(void *priv, unsigned int pos, void *buf,
+ size_t size)
{
- ssize_t count;
+ int i;
rtc_write(pos, DS1511_RAMADDR_LSB);
- for (count = 0; count < size; count++)
- *buf++ = rtc_read(DS1511_RAMDATA);
+ for (i = 0; i < size; i++)
+ *(char *)buf++ = rtc_read(DS1511_RAMDATA);
- return count;
+ return 0;
}
-static ssize_t
-ds1511_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t pos, size_t size)
+static int ds1511_nvram_write(void *priv, unsigned int pos, void *buf,
+ size_t size)
{
- ssize_t count;
+ int i;
rtc_write(pos, DS1511_RAMADDR_LSB);
- for (count = 0; count < size; count++)
- rtc_write(*buf++, DS1511_RAMDATA);
+ for (i = 0; i < size; i++)
+ rtc_write(*(char *)buf++, DS1511_RAMDATA);
- return count;
+ return 0;
}
-static struct bin_attribute ds1511_nvram_attr = {
- .attr = {
- .name = "nvram",
- .mode = S_IRUGO | S_IWUSR,
- },
+static struct nvmem_config ds1511_nvmem_cfg = {
+ .name = "ds1511_nvram",
+ .word_size = 1,
+ .stride = 1,
.size = DS1511_RAM_MAX,
- .read = ds1511_nvram_read,
- .write = ds1511_nvram_write,
+ .reg_read = ds1511_nvram_read,
+ .reg_write = ds1511_nvram_write,
};
static int ds1511_rtc_probe(struct platform_device *pdev)
@@ -477,11 +472,20 @@
spin_lock_init(&pdata->lock);
platform_set_drvdata(pdev, pdata);
- pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
- &ds1511_rtc_ops, THIS_MODULE);
+ pdata->rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(pdata->rtc))
return PTR_ERR(pdata->rtc);
+ pdata->rtc->ops = &ds1511_rtc_ops;
+
+ ds1511_nvmem_cfg.priv = &pdev->dev;
+ pdata->rtc->nvmem_config = &ds1511_nvmem_cfg;
+ pdata->rtc->nvram_old_abi = true;
+
+ ret = rtc_register_device(pdata->rtc);
+ if (ret)
+ return ret;
+
/*
* if the platform has an interrupt in mind for this device,
* then by all means, set it
@@ -496,26 +500,6 @@
}
}
- ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
- if (ret)
- dev_err(&pdev->dev, "Unable to create sysfs entry: %s\n",
- ds1511_nvram_attr.attr.name);
-
- return 0;
-}
-
-static int ds1511_rtc_remove(struct platform_device *pdev)
-{
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
-
- sysfs_remove_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
- if (pdata->irq > 0) {
- /*
- * disable the alarm interrupt
- */
- rtc_write(rtc_read(RTC_CMD) & ~RTC_TIE, RTC_CMD);
- rtc_read(RTC_CMD1);
- }
return 0;
}
@@ -524,7 +508,6 @@
static struct platform_driver ds1511_rtc_driver = {
.probe = ds1511_rtc_probe,
- .remove = ds1511_rtc_remove,
.driver = {
.name = "ds1511",
},
diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
index 64989af..ff65a7d 100644
--- a/drivers/rtc/rtc-jz4740.c
+++ b/drivers/rtc/rtc-jz4740.c
@@ -82,7 +82,7 @@
static int jz4740_rtc_wait_write_ready(struct jz4740_rtc *rtc)
{
uint32_t ctrl;
- int timeout = 1000;
+ int timeout = 10000;
do {
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
@@ -94,7 +94,7 @@
static inline int jz4780_rtc_enable_write(struct jz4740_rtc *rtc)
{
uint32_t ctrl;
- int ret, timeout = 1000;
+ int ret, timeout = 10000;
ret = jz4740_rtc_wait_write_ready(rtc);
if (ret != 0)
@@ -368,7 +368,7 @@
ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SCRATCHPAD, 0x12345678);
ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, 0);
if (ret) {
- dev_err(&pdev->dev, "Could not write write to RTC registers\n");
+ dev_err(&pdev->dev, "Could not write to RTC registers\n");
return ret;
}
}
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index f4c070e..c90fba3 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -154,6 +154,8 @@
struct rtc_device *rtc;
#ifdef CONFIG_COMMON_CLK
struct clk_hw sqw;
+ unsigned long freq;
+ unsigned int sqwe;
#endif
};
@@ -443,43 +445,40 @@
#ifdef CONFIG_COMMON_CLK
#define sqw_to_m41t80_data(_hw) container_of(_hw, struct m41t80_data, sqw)
-static unsigned long m41t80_sqw_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
+static unsigned long m41t80_decode_freq(int setting)
{
- struct m41t80_data *m41t80 = sqw_to_m41t80_data(hw);
+ return (setting == 0) ? 0 : (setting == 1) ? M41T80_SQW_MAX_FREQ :
+ M41T80_SQW_MAX_FREQ >> setting;
+}
+
+static unsigned long m41t80_get_freq(struct m41t80_data *m41t80)
+{
struct i2c_client *client = m41t80->client;
int reg_sqw = (m41t80->features & M41T80_FEATURE_SQ_ALT) ?
M41T80_REG_WDAY : M41T80_REG_SQW;
int ret = i2c_smbus_read_byte_data(client, reg_sqw);
- unsigned long val = M41T80_SQW_MAX_FREQ;
if (ret < 0)
return 0;
+ return m41t80_decode_freq(ret >> 4);
+}
- ret >>= 4;
- if (ret == 0)
- val = 0;
- else if (ret > 1)
- val = val / (1 << ret);
-
- return val;
+static unsigned long m41t80_sqw_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return sqw_to_m41t80_data(hw)->freq;
}
static long m41t80_sqw_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
- int i, freq = M41T80_SQW_MAX_FREQ;
-
- if (freq <= rate)
- return freq;
-
- for (i = 2; i <= ilog2(M41T80_SQW_MAX_FREQ); i++) {
- freq /= 1 << i;
- if (freq <= rate)
- return freq;
- }
-
- return 0;
+ if (rate >= M41T80_SQW_MAX_FREQ)
+ return M41T80_SQW_MAX_FREQ;
+ if (rate >= M41T80_SQW_MAX_FREQ / 4)
+ return M41T80_SQW_MAX_FREQ / 4;
+ if (!rate)
+ return 0;
+ return 1 << ilog2(rate);
}
static int m41t80_sqw_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -491,17 +490,12 @@
M41T80_REG_WDAY : M41T80_REG_SQW;
int reg, ret, val = 0;
- if (rate) {
- if (!is_power_of_2(rate))
- return -EINVAL;
- val = ilog2(rate);
- if (val == ilog2(M41T80_SQW_MAX_FREQ))
- val = 1;
- else if (val < (ilog2(M41T80_SQW_MAX_FREQ) - 1))
- val = ilog2(M41T80_SQW_MAX_FREQ) - val;
- else
- return -EINVAL;
- }
+ if (rate >= M41T80_SQW_MAX_FREQ)
+ val = 1;
+ else if (rate >= M41T80_SQW_MAX_FREQ / 4)
+ val = 2;
+ else if (rate)
+ val = 15 - ilog2(rate);
reg = i2c_smbus_read_byte_data(client, reg_sqw);
if (reg < 0)
@@ -510,10 +504,9 @@
reg = (reg & 0x0f) | (val << 4);
ret = i2c_smbus_write_byte_data(client, reg_sqw, reg);
- if (ret < 0)
- return ret;
-
- return -EINVAL;
+ if (!ret)
+ m41t80->freq = m41t80_decode_freq(val);
+ return ret;
}
static int m41t80_sqw_control(struct clk_hw *hw, bool enable)
@@ -530,7 +523,10 @@
else
ret &= ~M41T80_ALMON_SQWE;
- return i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, ret);
+ ret = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, ret);
+ if (!ret)
+ m41t80->sqwe = enable;
+ return ret;
}
static int m41t80_sqw_prepare(struct clk_hw *hw)
@@ -545,14 +541,7 @@
static int m41t80_sqw_is_prepared(struct clk_hw *hw)
{
- struct m41t80_data *m41t80 = sqw_to_m41t80_data(hw);
- struct i2c_client *client = m41t80->client;
- int ret = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON);
-
- if (ret < 0)
- return ret;
-
- return !!(ret & M41T80_ALMON_SQWE);
+ return sqw_to_m41t80_data(hw)->sqwe;
}
static const struct clk_ops m41t80_sqw_ops = {
@@ -587,6 +576,7 @@
init.parent_names = NULL;
init.num_parents = 0;
m41t80->sqw.init = &init;
+ m41t80->freq = m41t80_get_freq(m41t80);
/* optional override of the clockname */
of_property_read_string(node, "clock-output-names", &init.name);
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 02af045..d9aea9b 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -163,35 +163,30 @@
.proc = m48t86_rtc_proc,
};
-static ssize_t m48t86_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int m48t86_nvram_read(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct device *dev = kobj_to_dev(kobj);
+ struct device *dev = priv;
unsigned int i;
for (i = 0; i < count; i++)
- buf[i] = m48t86_readb(dev, M48T86_NVRAM(off + i));
+ ((u8 *)buf)[i] = m48t86_readb(dev, M48T86_NVRAM(off + i));
- return count;
+ return 0;
}
-static ssize_t m48t86_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int m48t86_nvram_write(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct device *dev = kobj_to_dev(kobj);
+ struct device *dev = priv;
unsigned int i;
for (i = 0; i < count; i++)
- m48t86_writeb(dev, buf[i], M48T86_NVRAM(off + i));
+ m48t86_writeb(dev, ((u8 *)buf)[i], M48T86_NVRAM(off + i));
- return count;
+ return 0;
}
-static BIN_ATTR(nvram, 0644, m48t86_nvram_read, m48t86_nvram_write,
- M48T86_NVRAM_LEN);
-
/*
* The RTC is an optional feature at purchase time on some Technologic Systems
* boards. Verify that it actually exists by checking if the last two bytes
@@ -223,11 +218,21 @@
return false;
}
+static struct nvmem_config m48t86_nvmem_cfg = {
+ .name = "m48t86_nvram",
+ .word_size = 1,
+ .stride = 1,
+ .size = M48T86_NVRAM_LEN,
+ .reg_read = m48t86_nvram_read,
+ .reg_write = m48t86_nvram_write,
+};
+
static int m48t86_rtc_probe(struct platform_device *pdev)
{
struct m48t86_rtc_info *info;
struct resource *res;
unsigned char reg;
+ int err;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
@@ -254,25 +259,25 @@
return -ENODEV;
}
- info->rtc = devm_rtc_device_register(&pdev->dev, "m48t86",
- &m48t86_rtc_ops, THIS_MODULE);
+ info->rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(info->rtc))
return PTR_ERR(info->rtc);
+ info->rtc->ops = &m48t86_rtc_ops;
+
+ m48t86_nvmem_cfg.priv = &pdev->dev;
+ info->rtc->nvmem_config = &m48t86_nvmem_cfg;
+ info->rtc->nvram_old_abi = true;
+
+ err = rtc_register_device(info->rtc);
+ if (err)
+ return err;
+
/* read battery status */
reg = m48t86_readb(&pdev->dev, M48T86_D);
dev_info(&pdev->dev, "battery %s\n",
(reg & M48T86_D_VRT) ? "ok" : "exhausted");
- if (device_create_bin_file(&pdev->dev, &bin_attr_nvram))
- dev_err(&pdev->dev, "failed to create nvram sysfs entry\n");
-
- return 0;
-}
-
-static int m48t86_rtc_remove(struct platform_device *pdev)
-{
- device_remove_bin_file(&pdev->dev, &bin_attr_nvram);
return 0;
}
@@ -281,7 +286,6 @@
.name = "rtc-m48t86",
},
.probe = m48t86_rtc_probe,
- .remove = m48t86_rtc_remove,
};
module_platform_driver(m48t86_rtc_platform_driver);
diff --git a/drivers/rtc/rtc-mt7622.c b/drivers/rtc/rtc-mt7622.c
new file mode 100644
index 0000000..d79b9ae
--- /dev/null
+++ b/drivers/rtc/rtc-mt7622.c
@@ -0,0 +1,422 @@
+/*
+ * Driver for MediaTek SoC based RTC
+ *
+ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#define MTK_RTC_DEV KBUILD_MODNAME
+
+#define MTK_RTC_PWRCHK1 0x4
+#define RTC_PWRCHK1_MAGIC 0xc6
+
+#define MTK_RTC_PWRCHK2 0x8
+#define RTC_PWRCHK2_MAGIC 0x9a
+
+#define MTK_RTC_KEY 0xc
+#define RTC_KEY_MAGIC 0x59
+
+#define MTK_RTC_PROT1 0x10
+#define RTC_PROT1_MAGIC 0xa3
+
+#define MTK_RTC_PROT2 0x14
+#define RTC_PROT2_MAGIC 0x57
+
+#define MTK_RTC_PROT3 0x18
+#define RTC_PROT3_MAGIC 0x67
+
+#define MTK_RTC_PROT4 0x1c
+#define RTC_PROT4_MAGIC 0xd2
+
+#define MTK_RTC_CTL 0x20
+#define RTC_RC_STOP BIT(0)
+
+#define MTK_RTC_DEBNCE 0x2c
+#define RTC_DEBNCE_MASK GENMASK(2, 0)
+
+#define MTK_RTC_INT 0x30
+#define RTC_INT_AL_STA BIT(4)
+
+/*
+ * Ranges from 0x40 to 0x78 provide RTC time setup for year, month,
+ * day of month, day of week, hour, minute and second.
+ */
+#define MTK_RTC_TREG(_t, _f) (0x40 + (0x4 * (_f)) + ((_t) * 0x20))
+
+#define MTK_RTC_AL_CTL 0x7c
+#define RTC_AL_EN BIT(0)
+#define RTC_AL_ALL GENMASK(7, 0)
+
+/*
+ * The offset is used in the translation for the year between in struct
+ * rtc_time and in hardware register MTK_RTC_TREG(x,MTK_YEA)
+ */
+#define MTK_RTC_TM_YR_OFFSET 100
+
+/*
+ * The lowest value for the valid tm_year. RTC hardware would take incorrectly
+ * tm_year 100 as not a leap year and thus it is also required being excluded
+ * from the valid options.
+ */
+#define MTK_RTC_TM_YR_L (MTK_RTC_TM_YR_OFFSET + 1)
+
+/*
+ * The most year the RTC can hold is 99 and the next to 99 in year register
+ * would be wraparound to 0, for MT7622.
+ */
+#define MTK_RTC_HW_YR_LIMIT 99
+
+/* The highest value for the valid tm_year */
+#define MTK_RTC_TM_YR_H (MTK_RTC_TM_YR_OFFSET + MTK_RTC_HW_YR_LIMIT)
+
+/* Simple macro helps to check whether the hardware supports the tm_year */
+#define MTK_RTC_TM_YR_VALID(_y) ((_y) >= MTK_RTC_TM_YR_L && \
+ (_y) <= MTK_RTC_TM_YR_H)
+
+/* Types of the function the RTC provides are time counter and alarm. */
+enum {
+ MTK_TC,
+ MTK_AL,
+};
+
+/* Indexes are used for the pointer to relevant registers in MTK_RTC_TREG */
+enum {
+ MTK_YEA,
+ MTK_MON,
+ MTK_DOM,
+ MTK_DOW,
+ MTK_HOU,
+ MTK_MIN,
+ MTK_SEC
+};
+
+struct mtk_rtc {
+ struct rtc_device *rtc;
+ void __iomem *base;
+ int irq;
+ struct clk *clk;
+};
+
+static void mtk_w32(struct mtk_rtc *rtc, u32 reg, u32 val)
+{
+ writel_relaxed(val, rtc->base + reg);
+}
+
+static u32 mtk_r32(struct mtk_rtc *rtc, u32 reg)
+{
+ return readl_relaxed(rtc->base + reg);
+}
+
+static void mtk_rmw(struct mtk_rtc *rtc, u32 reg, u32 mask, u32 set)
+{
+ u32 val;
+
+ val = mtk_r32(rtc, reg);
+ val &= ~mask;
+ val |= set;
+ mtk_w32(rtc, reg, val);
+}
+
+static void mtk_set(struct mtk_rtc *rtc, u32 reg, u32 val)
+{
+ mtk_rmw(rtc, reg, 0, val);
+}
+
+static void mtk_clr(struct mtk_rtc *rtc, u32 reg, u32 val)
+{
+ mtk_rmw(rtc, reg, val, 0);
+}
+
+static void mtk_rtc_hw_init(struct mtk_rtc *hw)
+{
+ /* The setup of the init sequence is for allowing RTC got to work */
+ mtk_w32(hw, MTK_RTC_PWRCHK1, RTC_PWRCHK1_MAGIC);
+ mtk_w32(hw, MTK_RTC_PWRCHK2, RTC_PWRCHK2_MAGIC);
+ mtk_w32(hw, MTK_RTC_KEY, RTC_KEY_MAGIC);
+ mtk_w32(hw, MTK_RTC_PROT1, RTC_PROT1_MAGIC);
+ mtk_w32(hw, MTK_RTC_PROT2, RTC_PROT2_MAGIC);
+ mtk_w32(hw, MTK_RTC_PROT3, RTC_PROT3_MAGIC);
+ mtk_w32(hw, MTK_RTC_PROT4, RTC_PROT4_MAGIC);
+ mtk_rmw(hw, MTK_RTC_DEBNCE, RTC_DEBNCE_MASK, 0);
+ mtk_clr(hw, MTK_RTC_CTL, RTC_RC_STOP);
+}
+
+static void mtk_rtc_get_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm,
+ int time_alarm)
+{
+ u32 year, mon, mday, wday, hour, min, sec;
+
+ /*
+ * Read again until the field of the second is not changed which
+ * ensures all fields in the consistent state. Note that MTK_SEC must
+ * be read first. In this way, it guarantees the others remain not
+ * changed when the results for two MTK_SEC consecutive reads are same.
+ */
+ do {
+ sec = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC));
+ min = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_MIN));
+ hour = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_HOU));
+ wday = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_DOW));
+ mday = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_DOM));
+ mon = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_MON));
+ year = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_YEA));
+ } while (sec != mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC)));
+
+ tm->tm_sec = sec;
+ tm->tm_min = min;
+ tm->tm_hour = hour;
+ tm->tm_wday = wday;
+ tm->tm_mday = mday;
+ tm->tm_mon = mon - 1;
+
+ /* Rebase to the absolute year which userspace queries */
+ tm->tm_year = year + MTK_RTC_TM_YR_OFFSET;
+}
+
+static void mtk_rtc_set_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm,
+ int time_alarm)
+{
+ u32 year;
+
+ /* Rebase to the relative year which RTC hardware requires */
+ year = tm->tm_year - MTK_RTC_TM_YR_OFFSET;
+
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_YEA), year);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_MON), tm->tm_mon + 1);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_DOW), tm->tm_wday);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_DOM), tm->tm_mday);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_HOU), tm->tm_hour);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_MIN), tm->tm_min);
+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC), tm->tm_sec);
+}
+
+static irqreturn_t mtk_rtc_alarmirq(int irq, void *id)
+{
+ struct mtk_rtc *hw = (struct mtk_rtc *)id;
+ u32 irq_sta;
+
+ irq_sta = mtk_r32(hw, MTK_RTC_INT);
+ if (irq_sta & RTC_INT_AL_STA) {
+ /* Stop alarm also implicitly disables the alarm interrupt */
+ mtk_w32(hw, MTK_RTC_AL_CTL, 0);
+ rtc_update_irq(hw->rtc, 1, RTC_IRQF | RTC_AF);
+
+ /* Ack alarm interrupt status */
+ mtk_w32(hw, MTK_RTC_INT, RTC_INT_AL_STA);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static int mtk_rtc_gettime(struct device *dev, struct rtc_time *tm)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+
+ mtk_rtc_get_alarm_or_time(hw, tm, MTK_TC);
+
+ return rtc_valid_tm(tm);
+}
+
+static int mtk_rtc_settime(struct device *dev, struct rtc_time *tm)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+
+ if (!MTK_RTC_TM_YR_VALID(tm->tm_year))
+ return -EINVAL;
+
+ /* Stop time counter before setting a new one*/
+ mtk_set(hw, MTK_RTC_CTL, RTC_RC_STOP);
+
+ mtk_rtc_set_alarm_or_time(hw, tm, MTK_TC);
+
+ /* Restart the time counter */
+ mtk_clr(hw, MTK_RTC_CTL, RTC_RC_STOP);
+
+ return 0;
+}
+
+static int mtk_rtc_getalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+ struct rtc_time *alrm_tm = &wkalrm->time;
+
+ mtk_rtc_get_alarm_or_time(hw, alrm_tm, MTK_AL);
+
+ wkalrm->enabled = !!(mtk_r32(hw, MTK_RTC_AL_CTL) & RTC_AL_EN);
+ wkalrm->pending = !!(mtk_r32(hw, MTK_RTC_INT) & RTC_INT_AL_STA);
+
+ return 0;
+}
+
+static int mtk_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+ struct rtc_time *alrm_tm = &wkalrm->time;
+
+ if (!MTK_RTC_TM_YR_VALID(alrm_tm->tm_year))
+ return -EINVAL;
+
+ /*
+ * Stop the alarm also implicitly including disables interrupt before
+ * setting a new one.
+ */
+ mtk_clr(hw, MTK_RTC_AL_CTL, RTC_AL_EN);
+
+ /*
+ * Avoid contention between mtk_rtc_setalarm and IRQ handler so that
+ * disabling the interrupt and awaiting for pending IRQ handler to
+ * complete.
+ */
+ synchronize_irq(hw->irq);
+
+ mtk_rtc_set_alarm_or_time(hw, alrm_tm, MTK_AL);
+
+ /* Restart the alarm with the new setup */
+ mtk_w32(hw, MTK_RTC_AL_CTL, RTC_AL_ALL);
+
+ return 0;
+}
+
+static const struct rtc_class_ops mtk_rtc_ops = {
+ .read_time = mtk_rtc_gettime,
+ .set_time = mtk_rtc_settime,
+ .read_alarm = mtk_rtc_getalarm,
+ .set_alarm = mtk_rtc_setalarm,
+};
+
+static const struct of_device_id mtk_rtc_match[] = {
+ { .compatible = "mediatek,mt7622-rtc" },
+ { .compatible = "mediatek,soc-rtc" },
+ {},
+};
+
+static int mtk_rtc_probe(struct platform_device *pdev)
+{
+ struct mtk_rtc *hw;
+ struct resource *res;
+ int ret;
+
+ hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
+ if (!hw)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, hw);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hw->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hw->base))
+ return PTR_ERR(hw->base);
+
+ hw->clk = devm_clk_get(&pdev->dev, "rtc");
+ if (IS_ERR(hw->clk)) {
+ dev_err(&pdev->dev, "No clock\n");
+ return PTR_ERR(hw->clk);
+ }
+
+ ret = clk_prepare_enable(hw->clk);
+ if (ret)
+ return ret;
+
+ hw->irq = platform_get_irq(pdev, 0);
+ if (hw->irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ ret = hw->irq;
+ goto err;
+ }
+
+ ret = devm_request_irq(&pdev->dev, hw->irq, mtk_rtc_alarmirq,
+ 0, dev_name(&pdev->dev), hw);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't request IRQ\n");
+ goto err;
+ }
+
+ mtk_rtc_hw_init(hw);
+
+ device_init_wakeup(&pdev->dev, true);
+
+ hw->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &mtk_rtc_ops, THIS_MODULE);
+ if (IS_ERR(hw->rtc)) {
+ ret = PTR_ERR(hw->rtc);
+ dev_err(&pdev->dev, "Unable to register device\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ clk_disable_unprepare(hw->clk);
+
+ return ret;
+}
+
+static int mtk_rtc_remove(struct platform_device *pdev)
+{
+ struct mtk_rtc *hw = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(hw->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mtk_rtc_suspend(struct device *dev)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(hw->irq);
+
+ return 0;
+}
+
+static int mtk_rtc_resume(struct device *dev)
+{
+ struct mtk_rtc *hw = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(hw->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mtk_rtc_pm_ops, mtk_rtc_suspend, mtk_rtc_resume);
+
+#define MTK_RTC_PM_OPS (&mtk_rtc_pm_ops)
+#else /* CONFIG_PM */
+#define MTK_RTC_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+static struct platform_driver mtk_rtc_driver = {
+ .probe = mtk_rtc_probe,
+ .remove = mtk_rtc_remove,
+ .driver = {
+ .name = MTK_RTC_DEV,
+ .of_match_table = mtk_rtc_match,
+ .pm = MTK_RTC_PM_OPS,
+ },
+};
+
+module_platform_driver(mtk_rtc_driver);
+
+MODULE_DESCRIPTION("MediaTek SoC based RTC Driver");
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 13f7cd1..1d666ac 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -70,6 +70,10 @@
#define OMAP_RTC_COMP_MSB_REG 0x50
#define OMAP_RTC_OSC_REG 0x54
+#define OMAP_RTC_SCRATCH0_REG 0x60
+#define OMAP_RTC_SCRATCH1_REG 0x64
+#define OMAP_RTC_SCRATCH2_REG 0x68
+
#define OMAP_RTC_KICK0_REG 0x6c
#define OMAP_RTC_KICK1_REG 0x70
@@ -667,6 +671,45 @@
.owner = THIS_MODULE,
};
+static int omap_rtc_scratch_read(void *priv, unsigned int offset, void *_val,
+ size_t bytes)
+{
+ struct omap_rtc *rtc = priv;
+ u32 *val = _val;
+ int i;
+
+ for (i = 0; i < bytes / 4; i++)
+ val[i] = rtc_readl(rtc,
+ OMAP_RTC_SCRATCH0_REG + offset + (i * 4));
+
+ return 0;
+}
+
+static int omap_rtc_scratch_write(void *priv, unsigned int offset, void *_val,
+ size_t bytes)
+{
+ struct omap_rtc *rtc = priv;
+ u32 *val = _val;
+ int i;
+
+ rtc->type->unlock(rtc);
+ for (i = 0; i < bytes / 4; i++)
+ rtc_writel(rtc,
+ OMAP_RTC_SCRATCH0_REG + offset + (i * 4), val[i]);
+ rtc->type->lock(rtc);
+
+ return 0;
+}
+
+static struct nvmem_config omap_rtc_nvmem_config = {
+ .name = "omap_rtc_scratch",
+ .word_size = 4,
+ .stride = 4,
+ .size = OMAP_RTC_KICK0_REG - OMAP_RTC_SCRATCH0_REG,
+ .reg_read = omap_rtc_scratch_read,
+ .reg_write = omap_rtc_scratch_write,
+};
+
static int omap_rtc_probe(struct platform_device *pdev)
{
struct omap_rtc *rtc;
@@ -797,13 +840,16 @@
device_init_wakeup(&pdev->dev, true);
- rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
- &omap_rtc_ops, THIS_MODULE);
+ rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(rtc->rtc)) {
ret = PTR_ERR(rtc->rtc);
goto err;
}
+ rtc->rtc->ops = &omap_rtc_ops;
+ omap_rtc_nvmem_config.priv = rtc;
+ rtc->rtc->nvmem_config = &omap_rtc_nvmem_config;
+
/* handle periodic and alarm irqs */
ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0,
dev_name(&rtc->rtc->dev), rtc);
@@ -830,9 +876,14 @@
rtc->pctldev = pinctrl_register(&rtc_pinctrl_desc, &pdev->dev, rtc);
if (IS_ERR(rtc->pctldev)) {
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
- return PTR_ERR(rtc->pctldev);
+ ret = PTR_ERR(rtc->pctldev);
+ goto err;
}
+ ret = rtc_register_device(rtc->rtc);
+ if (ret)
+ goto err;
+
return 0;
err:
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 28c48b3..c312af0 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -35,6 +35,9 @@
#define REG_MONTHS 0x08
#define REG_YEARS 0x09
+#define REG_OFFSET 0x0e
+#define REG_OFFSET_MODE BIT(7)
+
struct pcf8523 {
struct rtc_device *rtc;
};
@@ -272,10 +275,47 @@
#define pcf8523_rtc_ioctl NULL
#endif
+static int pcf8523_rtc_read_offset(struct device *dev, long *offset)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int err;
+ u8 value;
+ s8 val;
+
+ err = pcf8523_read(client, REG_OFFSET, &value);
+ if (err < 0)
+ return err;
+
+ /* sign extend the 7-bit offset value */
+ val = value << 1;
+ *offset = (value & REG_OFFSET_MODE ? 4069 : 4340) * (val >> 1);
+
+ return 0;
+}
+
+static int pcf8523_rtc_set_offset(struct device *dev, long offset)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ long reg_m0, reg_m1;
+ u8 value;
+
+ reg_m0 = clamp(DIV_ROUND_CLOSEST(offset, 4340), -64L, 63L);
+ reg_m1 = clamp(DIV_ROUND_CLOSEST(offset, 4069), -64L, 63L);
+
+ if (abs(reg_m0 * 4340 - offset) < abs(reg_m1 * 4069 - offset))
+ value = reg_m0 & 0x7f;
+ else
+ value = (reg_m1 & 0x7f) | REG_OFFSET_MODE;
+
+ return pcf8523_write(client, REG_OFFSET, value);
+}
+
static const struct rtc_class_ops pcf8523_rtc_ops = {
.read_time = pcf8523_rtc_read_time,
.set_time = pcf8523_rtc_set_time,
.ioctl = pcf8523_rtc_ioctl,
+ .read_offset = pcf8523_rtc_read_offset,
+ .set_offset = pcf8523_rtc_set_offset,
};
static int pcf8523_probe(struct i2c_client *client,
diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c
new file mode 100644
index 0000000..ea04e9f
--- /dev/null
+++ b/drivers/rtc/rtc-pcf85363.c
@@ -0,0 +1,220 @@
+/*
+ * drivers/rtc/rtc-pcf85363.c
+ *
+ * Driver for NXP PCF85363 real-time clock.
+ *
+ * Copyright (C) 2017 Eric Nelson
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based loosely on rtc-8583 by Russell King, Wolfram Sang and Juergen Beisert
+ */
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/rtc.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/bcd.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+/*
+ * Date/Time registers
+ */
+#define DT_100THS 0x00
+#define DT_SECS 0x01
+#define DT_MINUTES 0x02
+#define DT_HOURS 0x03
+#define DT_DAYS 0x04
+#define DT_WEEKDAYS 0x05
+#define DT_MONTHS 0x06
+#define DT_YEARS 0x07
+
+/*
+ * Alarm registers
+ */
+#define DT_SECOND_ALM1 0x08
+#define DT_MINUTE_ALM1 0x09
+#define DT_HOUR_ALM1 0x0a
+#define DT_DAY_ALM1 0x0b
+#define DT_MONTH_ALM1 0x0c
+#define DT_MINUTE_ALM2 0x0d
+#define DT_HOUR_ALM2 0x0e
+#define DT_WEEKDAY_ALM2 0x0f
+#define DT_ALARM_EN 0x10
+
+/*
+ * Time stamp registers
+ */
+#define DT_TIMESTAMP1 0x11
+#define DT_TIMESTAMP2 0x17
+#define DT_TIMESTAMP3 0x1d
+#define DT_TS_MODE 0x23
+
+/*
+ * control registers
+ */
+#define CTRL_OFFSET 0x24
+#define CTRL_OSCILLATOR 0x25
+#define CTRL_BATTERY 0x26
+#define CTRL_PIN_IO 0x27
+#define CTRL_FUNCTION 0x28
+#define CTRL_INTA_EN 0x29
+#define CTRL_INTB_EN 0x2a
+#define CTRL_FLAGS 0x2b
+#define CTRL_RAMBYTE 0x2c
+#define CTRL_WDOG 0x2d
+#define CTRL_STOP_EN 0x2e
+#define CTRL_RESETS 0x2f
+#define CTRL_RAM 0x40
+
+#define NVRAM_SIZE 0x40
+
+static struct i2c_driver pcf85363_driver;
+
+struct pcf85363 {
+ struct device *dev;
+ struct rtc_device *rtc;
+ struct nvmem_config nvmem_cfg;
+ struct regmap *regmap;
+};
+
+static int pcf85363_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
+ unsigned char buf[DT_YEARS + 1];
+ int ret, len = sizeof(buf);
+
+ /* read the RTC date and time registers all at once */
+ ret = regmap_bulk_read(pcf85363->regmap, DT_100THS, buf, len);
+ if (ret) {
+ dev_err(dev, "%s: error %d\n", __func__, ret);
+ return ret;
+ }
+
+ tm->tm_year = bcd2bin(buf[DT_YEARS]);
+ /* adjust for 1900 base of rtc_time */
+ tm->tm_year += 100;
+
+ tm->tm_wday = buf[DT_WEEKDAYS] & 7;
+ buf[DT_SECS] &= 0x7F;
+ tm->tm_sec = bcd2bin(buf[DT_SECS]);
+ buf[DT_MINUTES] &= 0x7F;
+ tm->tm_min = bcd2bin(buf[DT_MINUTES]);
+ tm->tm_hour = bcd2bin(buf[DT_HOURS]);
+ tm->tm_mday = bcd2bin(buf[DT_DAYS]);
+ tm->tm_mon = bcd2bin(buf[DT_MONTHS]) - 1;
+
+ return 0;
+}
+
+static int pcf85363_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
+ unsigned char buf[DT_YEARS + 1];
+ int len = sizeof(buf);
+
+ buf[DT_100THS] = 0;
+ buf[DT_SECS] = bin2bcd(tm->tm_sec);
+ buf[DT_MINUTES] = bin2bcd(tm->tm_min);
+ buf[DT_HOURS] = bin2bcd(tm->tm_hour);
+ buf[DT_DAYS] = bin2bcd(tm->tm_mday);
+ buf[DT_WEEKDAYS] = tm->tm_wday;
+ buf[DT_MONTHS] = bin2bcd(tm->tm_mon + 1);
+ buf[DT_YEARS] = bin2bcd(tm->tm_year % 100);
+
+ return regmap_bulk_write(pcf85363->regmap, DT_100THS,
+ buf, len);
+}
+
+static const struct rtc_class_ops rtc_ops = {
+ .read_time = pcf85363_rtc_read_time,
+ .set_time = pcf85363_rtc_set_time,
+};
+
+static int pcf85363_nvram_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct pcf85363 *pcf85363 = priv;
+
+ return regmap_bulk_read(pcf85363->regmap, CTRL_RAM + offset,
+ val, bytes);
+}
+
+static int pcf85363_nvram_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct pcf85363 *pcf85363 = priv;
+
+ return regmap_bulk_write(pcf85363->regmap, CTRL_RAM + offset,
+ val, bytes);
+}
+
+static const struct regmap_config regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int pcf85363_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pcf85363 *pcf85363;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -ENODEV;
+
+ pcf85363 = devm_kzalloc(&client->dev, sizeof(struct pcf85363),
+ GFP_KERNEL);
+ if (!pcf85363)
+ return -ENOMEM;
+
+ pcf85363->regmap = devm_regmap_init_i2c(client, ®map_config);
+ if (IS_ERR(pcf85363->regmap)) {
+ dev_err(&client->dev, "regmap allocation failed\n");
+ return PTR_ERR(pcf85363->regmap);
+ }
+
+ pcf85363->dev = &client->dev;
+ i2c_set_clientdata(client, pcf85363);
+
+ pcf85363->rtc = devm_rtc_allocate_device(pcf85363->dev);
+ if (IS_ERR(pcf85363->rtc))
+ return PTR_ERR(pcf85363->rtc);
+
+ pcf85363->nvmem_cfg.name = "pcf85363-";
+ pcf85363->nvmem_cfg.word_size = 1;
+ pcf85363->nvmem_cfg.stride = 1;
+ pcf85363->nvmem_cfg.size = NVRAM_SIZE;
+ pcf85363->nvmem_cfg.reg_read = pcf85363_nvram_read;
+ pcf85363->nvmem_cfg.reg_write = pcf85363_nvram_write;
+ pcf85363->nvmem_cfg.priv = pcf85363;
+ pcf85363->rtc->nvmem_config = &pcf85363->nvmem_cfg;
+ pcf85363->rtc->ops = &rtc_ops;
+
+ return rtc_register_device(pcf85363->rtc);
+}
+
+static const struct of_device_id dev_ids[] = {
+ { .compatible = "nxp,pcf85363" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, dev_ids);
+
+static struct i2c_driver pcf85363_driver = {
+ .driver = {
+ .name = "pcf85363",
+ .of_match_table = of_match_ptr(dev_ids),
+ },
+ .probe = pcf85363_probe,
+};
+
+module_i2c_driver(pcf85363_driver);
+
+MODULE_AUTHOR("Eric Nelson");
+MODULE_DESCRIPTION("pcf85363 I2C RTC driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index cea6ea4..3efc86c 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -387,7 +387,7 @@
if (err)
return err;
- return pcf8563_set_alarm_mode(client, 1);
+ return pcf8563_set_alarm_mode(client, !!tm->enabled);
}
static int pcf8563_irq_enable(struct device *dev, unsigned int enabled)
@@ -422,7 +422,7 @@
return 0;
buf &= PCF8563_REG_CLKO_F_MASK;
- return clkout_rates[ret];
+ return clkout_rates[buf];
}
static long pcf8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index e1687e1..82eb7da 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -308,10 +308,9 @@
dev_pm_clear_wake_irq(&adev->dev);
device_init_wakeup(&adev->dev, false);
- free_irq(adev->irq[0], ldata);
+ if (adev->irq[0])
+ free_irq(adev->irq[0], ldata);
rtc_device_unregister(ldata->rtc);
- iounmap(ldata->base);
- kfree(ldata);
amba_release_regions(adev);
return 0;
@@ -322,25 +321,28 @@
int ret;
struct pl031_local *ldata;
struct pl031_vendor_data *vendor = id->data;
- struct rtc_class_ops *ops = &vendor->ops;
+ struct rtc_class_ops *ops;
unsigned long time, data;
ret = amba_request_regions(adev, NULL);
if (ret)
goto err_req;
- ldata = kzalloc(sizeof(struct pl031_local), GFP_KERNEL);
- if (!ldata) {
+ ldata = devm_kzalloc(&adev->dev, sizeof(struct pl031_local),
+ GFP_KERNEL);
+ ops = devm_kmemdup(&adev->dev, &vendor->ops, sizeof(vendor->ops),
+ GFP_KERNEL);
+ if (!ldata || !ops) {
ret = -ENOMEM;
goto out;
}
+
ldata->vendor = vendor;
-
- ldata->base = ioremap(adev->res.start, resource_size(&adev->res));
-
+ ldata->base = devm_ioremap(&adev->dev, adev->res.start,
+ resource_size(&adev->res));
if (!ldata->base) {
ret = -ENOMEM;
- goto out_no_remap;
+ goto out;
}
amba_set_drvdata(adev, ldata);
@@ -373,28 +375,32 @@
}
}
+ if (!adev->irq[0]) {
+ /* When there's no interrupt, no point in exposing the alarm */
+ ops->read_alarm = NULL;
+ ops->set_alarm = NULL;
+ ops->alarm_irq_enable = NULL;
+ }
+
device_init_wakeup(&adev->dev, true);
ldata->rtc = rtc_device_register("pl031", &adev->dev, ops,
THIS_MODULE);
if (IS_ERR(ldata->rtc)) {
ret = PTR_ERR(ldata->rtc);
- goto out_no_rtc;
+ goto out;
}
- if (request_irq(adev->irq[0], pl031_interrupt,
- vendor->irqflags, "rtc-pl031", ldata)) {
- ret = -EIO;
- goto out_no_irq;
+ if (adev->irq[0]) {
+ ret = request_irq(adev->irq[0], pl031_interrupt,
+ vendor->irqflags, "rtc-pl031", ldata);
+ if (ret)
+ goto out_no_irq;
+ dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
}
- dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
return 0;
out_no_irq:
rtc_device_unregister(ldata->rtc);
-out_no_rtc:
- iounmap(ldata->base);
-out_no_remap:
- kfree(ldata);
out:
amba_release_regions(adev);
err_req:
@@ -446,7 +452,7 @@
.irqflags = IRQF_SHARED | IRQF_COND_SUSPEND,
};
-static struct amba_id pl031_ids[] = {
+static const struct amba_id pl031_ids[] = {
{
.id = 0x00041031,
.mask = 0x000fffff,
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index aa09771..3d6174e 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -282,13 +282,13 @@
static int rv3029_eeprom_write(struct device *dev, u8 reg,
u8 const buf[], size_t len)
{
- int ret, err;
+ int ret;
size_t i;
u8 tmp;
- err = rv3029_eeprom_enter(dev);
- if (err < 0)
- return err;
+ ret = rv3029_eeprom_enter(dev);
+ if (ret < 0)
+ return ret;
for (i = 0; i < len; i++, reg++) {
ret = rv3029_read_regs(dev, reg, &tmp, 1);
@@ -304,11 +304,11 @@
break;
}
- err = rv3029_eeprom_exit(dev);
- if (err < 0)
- return err;
+ ret = rv3029_eeprom_exit(dev);
+ if (ret < 0)
+ return ret;
- return ret;
+ return 0;
}
static int rv3029_eeprom_update_bits(struct device *dev,
@@ -876,6 +876,8 @@
MODULE_DEVICE_TABLE(i2c, rv3029_id);
static const struct of_device_id rv3029_of_match[] = {
+ { .compatible = "microcrystal,rv3029" },
+ /* Backward compatibility only, do not use compatibles below: */
{ .compatible = "rv3029" },
{ .compatible = "rv3029c2" },
{ .compatible = "mc,rv3029c2" },
diff --git a/drivers/rtc/rtc-rx8010.c b/drivers/rtc/rtc-rx8010.c
index 1ed3403..5c5938a 100644
--- a/drivers/rtc/rtc-rx8010.c
+++ b/drivers/rtc/rtc-rx8010.c
@@ -24,7 +24,6 @@
#define RX8010_MDAY 0x14
#define RX8010_MONTH 0x15
#define RX8010_YEAR 0x16
-#define RX8010_YEAR 0x16
#define RX8010_RESV17 0x17
#define RX8010_ALMIN 0x18
#define RX8010_ALHOUR 0x19
@@ -36,7 +35,7 @@
#define RX8010_CTRL 0x1F
/* 0x20 to 0x2F are user registers */
#define RX8010_RESV30 0x30
-#define RX8010_RESV31 0x32
+#define RX8010_RESV31 0x31
#define RX8010_IRQ 0x32
#define RX8010_EXT_WADA BIT(3)
@@ -248,7 +247,7 @@
rx8010->ctrlreg = (ctrl[1] & ~RX8010_CTRL_TEST);
- return err;
+ return 0;
}
static int rx8010_read_alarm(struct device *dev, struct rtc_wkalrm *t)
@@ -277,7 +276,7 @@
t->enabled = !!(rx8010->ctrlreg & RX8010_CTRL_AIE);
t->pending = (flagreg & RX8010_FLAG_AF) && t->enabled;
- return err;
+ return 0;
}
static int rx8010_set_alarm(struct device *dev, struct rtc_wkalrm *t)
diff --git a/drivers/rtc/rtc-sc27xx.c b/drivers/rtc/rtc-sc27xx.c
new file mode 100644
index 0000000..d544d52
--- /dev/null
+++ b/drivers/rtc/rtc-sc27xx.c
@@ -0,0 +1,662 @@
+/*
+ * Copyright (C) 2017 Spreadtrum Communications Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+
+#define SPRD_RTC_SEC_CNT_VALUE 0x0
+#define SPRD_RTC_MIN_CNT_VALUE 0x4
+#define SPRD_RTC_HOUR_CNT_VALUE 0x8
+#define SPRD_RTC_DAY_CNT_VALUE 0xc
+#define SPRD_RTC_SEC_CNT_UPD 0x10
+#define SPRD_RTC_MIN_CNT_UPD 0x14
+#define SPRD_RTC_HOUR_CNT_UPD 0x18
+#define SPRD_RTC_DAY_CNT_UPD 0x1c
+#define SPRD_RTC_SEC_ALM_UPD 0x20
+#define SPRD_RTC_MIN_ALM_UPD 0x24
+#define SPRD_RTC_HOUR_ALM_UPD 0x28
+#define SPRD_RTC_DAY_ALM_UPD 0x2c
+#define SPRD_RTC_INT_EN 0x30
+#define SPRD_RTC_INT_RAW_STS 0x34
+#define SPRD_RTC_INT_CLR 0x38
+#define SPRD_RTC_INT_MASK_STS 0x3C
+#define SPRD_RTC_SEC_ALM_VALUE 0x40
+#define SPRD_RTC_MIN_ALM_VALUE 0x44
+#define SPRD_RTC_HOUR_ALM_VALUE 0x48
+#define SPRD_RTC_DAY_ALM_VALUE 0x4c
+#define SPRD_RTC_SPG_VALUE 0x50
+#define SPRD_RTC_SPG_UPD 0x54
+#define SPRD_RTC_SEC_AUXALM_UPD 0x60
+#define SPRD_RTC_MIN_AUXALM_UPD 0x64
+#define SPRD_RTC_HOUR_AUXALM_UPD 0x68
+#define SPRD_RTC_DAY_AUXALM_UPD 0x6c
+
+/* BIT & MASK definition for SPRD_RTC_INT_* registers */
+#define SPRD_RTC_SEC_EN BIT(0)
+#define SPRD_RTC_MIN_EN BIT(1)
+#define SPRD_RTC_HOUR_EN BIT(2)
+#define SPRD_RTC_DAY_EN BIT(3)
+#define SPRD_RTC_ALARM_EN BIT(4)
+#define SPRD_RTC_HRS_FORMAT_EN BIT(5)
+#define SPRD_RTC_AUXALM_EN BIT(6)
+#define SPRD_RTC_SPG_UPD_EN BIT(7)
+#define SPRD_RTC_SEC_UPD_EN BIT(8)
+#define SPRD_RTC_MIN_UPD_EN BIT(9)
+#define SPRD_RTC_HOUR_UPD_EN BIT(10)
+#define SPRD_RTC_DAY_UPD_EN BIT(11)
+#define SPRD_RTC_ALMSEC_UPD_EN BIT(12)
+#define SPRD_RTC_ALMMIN_UPD_EN BIT(13)
+#define SPRD_RTC_ALMHOUR_UPD_EN BIT(14)
+#define SPRD_RTC_ALMDAY_UPD_EN BIT(15)
+#define SPRD_RTC_INT_MASK GENMASK(15, 0)
+
+#define SPRD_RTC_TIME_INT_MASK \
+ (SPRD_RTC_SEC_UPD_EN | SPRD_RTC_MIN_UPD_EN | \
+ SPRD_RTC_HOUR_UPD_EN | SPRD_RTC_DAY_UPD_EN)
+
+#define SPRD_RTC_ALMTIME_INT_MASK \
+ (SPRD_RTC_ALMSEC_UPD_EN | SPRD_RTC_ALMMIN_UPD_EN | \
+ SPRD_RTC_ALMHOUR_UPD_EN | SPRD_RTC_ALMDAY_UPD_EN)
+
+#define SPRD_RTC_ALM_INT_MASK \
+ (SPRD_RTC_SEC_EN | SPRD_RTC_MIN_EN | \
+ SPRD_RTC_HOUR_EN | SPRD_RTC_DAY_EN | \
+ SPRD_RTC_ALARM_EN | SPRD_RTC_AUXALM_EN)
+
+/* second/minute/hour/day values mask definition */
+#define SPRD_RTC_SEC_MASK GENMASK(5, 0)
+#define SPRD_RTC_MIN_MASK GENMASK(5, 0)
+#define SPRD_RTC_HOUR_MASK GENMASK(4, 0)
+#define SPRD_RTC_DAY_MASK GENMASK(15, 0)
+
+/* alarm lock definition for SPRD_RTC_SPG_UPD register */
+#define SPRD_RTC_ALMLOCK_MASK GENMASK(7, 0)
+#define SPRD_RTC_ALM_UNLOCK 0xa5
+#define SPRD_RTC_ALM_LOCK (~SPRD_RTC_ALM_UNLOCK & \
+ SPRD_RTC_ALMLOCK_MASK)
+
+/* SPG values definition for SPRD_RTC_SPG_UPD register */
+#define SPRD_RTC_POWEROFF_ALM_FLAG BIT(8)
+#define SPRD_RTC_POWER_RESET_FLAG BIT(9)
+
+/* timeout of synchronizing time and alarm registers (us) */
+#define SPRD_RTC_POLL_TIMEOUT 200000
+#define SPRD_RTC_POLL_DELAY_US 20000
+
+struct sprd_rtc {
+ struct rtc_device *rtc;
+ struct regmap *regmap;
+ struct device *dev;
+ u32 base;
+ int irq;
+ bool valid;
+};
+
+/*
+ * The Spreadtrum RTC controller has 3 groups registers, including time, normal
+ * alarm and auxiliary alarm. The time group registers are used to set RTC time,
+ * the normal alarm registers are used to set normal alarm, and the auxiliary
+ * alarm registers are used to set auxiliary alarm. Both alarm event and
+ * auxiliary alarm event can wake up system from deep sleep, but only alarm
+ * event can power up system from power down status.
+ */
+enum sprd_rtc_reg_types {
+ SPRD_RTC_TIME,
+ SPRD_RTC_ALARM,
+ SPRD_RTC_AUX_ALARM,
+};
+
+static int sprd_rtc_clear_alarm_ints(struct sprd_rtc *rtc)
+{
+ return regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ SPRD_RTC_ALM_INT_MASK);
+}
+
+static int sprd_rtc_disable_ints(struct sprd_rtc *rtc)
+{
+ int ret;
+
+ ret = regmap_update_bits(rtc->regmap, rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_INT_MASK, 0);
+ if (ret)
+ return ret;
+
+ return regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ SPRD_RTC_INT_MASK);
+}
+
+static int sprd_rtc_lock_alarm(struct sprd_rtc *rtc, bool lock)
+{
+ int ret;
+ u32 val;
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_SPG_VALUE, &val);
+ if (ret)
+ return ret;
+
+ val &= ~(SPRD_RTC_ALMLOCK_MASK | SPRD_RTC_POWEROFF_ALM_FLAG);
+ if (lock)
+ val |= SPRD_RTC_ALM_LOCK;
+ else
+ val |= SPRD_RTC_ALM_UNLOCK | SPRD_RTC_POWEROFF_ALM_FLAG;
+
+ ret = regmap_write(rtc->regmap, rtc->base + SPRD_RTC_SPG_UPD, val);
+ if (ret)
+ return ret;
+
+ /* wait until the SPG value is updated successfully */
+ ret = regmap_read_poll_timeout(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_RAW_STS, val,
+ (val & SPRD_RTC_SPG_UPD_EN),
+ SPRD_RTC_POLL_DELAY_US,
+ SPRD_RTC_POLL_TIMEOUT);
+ if (ret) {
+ dev_err(rtc->dev, "failed to update SPG value:%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sprd_rtc_get_secs(struct sprd_rtc *rtc, enum sprd_rtc_reg_types type,
+ time64_t *secs)
+{
+ u32 sec_reg, min_reg, hour_reg, day_reg;
+ u32 val, sec, min, hour, day;
+ int ret;
+
+ switch (type) {
+ case SPRD_RTC_TIME:
+ sec_reg = SPRD_RTC_SEC_CNT_VALUE;
+ min_reg = SPRD_RTC_MIN_CNT_VALUE;
+ hour_reg = SPRD_RTC_HOUR_CNT_VALUE;
+ day_reg = SPRD_RTC_DAY_CNT_VALUE;
+ break;
+ case SPRD_RTC_ALARM:
+ sec_reg = SPRD_RTC_SEC_ALM_VALUE;
+ min_reg = SPRD_RTC_MIN_ALM_VALUE;
+ hour_reg = SPRD_RTC_HOUR_ALM_VALUE;
+ day_reg = SPRD_RTC_DAY_ALM_VALUE;
+ break;
+ case SPRD_RTC_AUX_ALARM:
+ sec_reg = SPRD_RTC_SEC_AUXALM_UPD;
+ min_reg = SPRD_RTC_MIN_AUXALM_UPD;
+ hour_reg = SPRD_RTC_HOUR_AUXALM_UPD;
+ day_reg = SPRD_RTC_DAY_AUXALM_UPD;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_read(rtc->regmap, rtc->base + sec_reg, &val);
+ if (ret)
+ return ret;
+
+ sec = val & SPRD_RTC_SEC_MASK;
+
+ ret = regmap_read(rtc->regmap, rtc->base + min_reg, &val);
+ if (ret)
+ return ret;
+
+ min = val & SPRD_RTC_MIN_MASK;
+
+ ret = regmap_read(rtc->regmap, rtc->base + hour_reg, &val);
+ if (ret)
+ return ret;
+
+ hour = val & SPRD_RTC_HOUR_MASK;
+
+ ret = regmap_read(rtc->regmap, rtc->base + day_reg, &val);
+ if (ret)
+ return ret;
+
+ day = val & SPRD_RTC_DAY_MASK;
+ *secs = (((time64_t)(day * 24) + hour) * 60 + min) * 60 + sec;
+ return 0;
+}
+
+static int sprd_rtc_set_secs(struct sprd_rtc *rtc, enum sprd_rtc_reg_types type,
+ time64_t secs)
+{
+ u32 sec_reg, min_reg, hour_reg, day_reg, sts_mask;
+ u32 sec, min, hour, day, val;
+ int ret, rem;
+
+ /* convert seconds to RTC time format */
+ day = div_s64_rem(secs, 86400, &rem);
+ hour = rem / 3600;
+ rem -= hour * 3600;
+ min = rem / 60;
+ sec = rem - min * 60;
+
+ switch (type) {
+ case SPRD_RTC_TIME:
+ sec_reg = SPRD_RTC_SEC_CNT_UPD;
+ min_reg = SPRD_RTC_MIN_CNT_UPD;
+ hour_reg = SPRD_RTC_HOUR_CNT_UPD;
+ day_reg = SPRD_RTC_DAY_CNT_UPD;
+ sts_mask = SPRD_RTC_TIME_INT_MASK;
+ break;
+ case SPRD_RTC_ALARM:
+ sec_reg = SPRD_RTC_SEC_ALM_UPD;
+ min_reg = SPRD_RTC_MIN_ALM_UPD;
+ hour_reg = SPRD_RTC_HOUR_ALM_UPD;
+ day_reg = SPRD_RTC_DAY_ALM_UPD;
+ sts_mask = SPRD_RTC_ALMTIME_INT_MASK;
+ break;
+ case SPRD_RTC_AUX_ALARM:
+ sec_reg = SPRD_RTC_SEC_AUXALM_UPD;
+ min_reg = SPRD_RTC_MIN_AUXALM_UPD;
+ hour_reg = SPRD_RTC_HOUR_AUXALM_UPD;
+ day_reg = SPRD_RTC_DAY_AUXALM_UPD;
+ sts_mask = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_write(rtc->regmap, rtc->base + sec_reg, sec);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(rtc->regmap, rtc->base + min_reg, min);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(rtc->regmap, rtc->base + hour_reg, hour);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(rtc->regmap, rtc->base + day_reg, day);
+ if (ret)
+ return ret;
+
+ if (type == SPRD_RTC_AUX_ALARM)
+ return 0;
+
+ /*
+ * Since the time and normal alarm registers are put in always-power-on
+ * region supplied by VDDRTC, then these registers changing time will
+ * be very long, about 125ms. Thus here we should wait until all
+ * values are updated successfully.
+ */
+ ret = regmap_read_poll_timeout(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_RAW_STS, val,
+ ((val & sts_mask) == sts_mask),
+ SPRD_RTC_POLL_DELAY_US,
+ SPRD_RTC_POLL_TIMEOUT);
+ if (ret < 0) {
+ dev_err(rtc->dev, "set time/alarm values timeout\n");
+ return ret;
+ }
+
+ return regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ sts_mask);
+}
+
+static int sprd_rtc_read_aux_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs;
+ u32 val;
+ int ret;
+
+ ret = sprd_rtc_get_secs(rtc, SPRD_RTC_AUX_ALARM, &secs);
+ if (ret)
+ return ret;
+
+ rtc_time64_to_tm(secs, &alrm->time);
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_INT_EN, &val);
+ if (ret)
+ return ret;
+
+ alrm->enabled = !!(val & SPRD_RTC_AUXALM_EN);
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_INT_RAW_STS, &val);
+ if (ret)
+ return ret;
+
+ alrm->pending = !!(val & SPRD_RTC_AUXALM_EN);
+ return 0;
+}
+
+static int sprd_rtc_set_aux_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs = rtc_tm_to_time64(&alrm->time);
+ int ret;
+
+ /* clear the auxiliary alarm interrupt status */
+ ret = regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ SPRD_RTC_AUXALM_EN);
+ if (ret)
+ return ret;
+
+ ret = sprd_rtc_set_secs(rtc, SPRD_RTC_AUX_ALARM, secs);
+ if (ret)
+ return ret;
+
+ if (alrm->enabled) {
+ ret = regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_AUXALM_EN,
+ SPRD_RTC_AUXALM_EN);
+ } else {
+ ret = regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_AUXALM_EN, 0);
+ }
+
+ return ret;
+}
+
+static int sprd_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs;
+ int ret;
+
+ if (!rtc->valid) {
+ dev_warn(dev, "RTC values are invalid\n");
+ return -EINVAL;
+ }
+
+ ret = sprd_rtc_get_secs(rtc, SPRD_RTC_TIME, &secs);
+ if (ret)
+ return ret;
+
+ rtc_time64_to_tm(secs, tm);
+ return rtc_valid_tm(tm);
+}
+
+static int sprd_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs = rtc_tm_to_time64(tm);
+ u32 val;
+ int ret;
+
+ ret = sprd_rtc_set_secs(rtc, SPRD_RTC_TIME, secs);
+ if (ret)
+ return ret;
+
+ if (!rtc->valid) {
+ /*
+ * Set SPRD_RTC_POWER_RESET_FLAG to indicate now RTC has valid
+ * time values.
+ */
+ ret = regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_SPG_UPD,
+ SPRD_RTC_POWER_RESET_FLAG,
+ SPRD_RTC_POWER_RESET_FLAG);
+ if (ret)
+ return ret;
+
+ ret = regmap_read_poll_timeout(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_RAW_STS,
+ val, (val & SPRD_RTC_SPG_UPD_EN),
+ SPRD_RTC_POLL_DELAY_US,
+ SPRD_RTC_POLL_TIMEOUT);
+ if (ret) {
+ dev_err(rtc->dev, "failed to update SPG value:%d\n",
+ ret);
+ return ret;
+ }
+
+ rtc->valid = true;
+ }
+
+ return 0;
+}
+
+static int sprd_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs;
+ int ret;
+ u32 val;
+
+ /*
+ * If aie_timer is enabled, we should get the normal alarm time.
+ * Otherwise we should get auxiliary alarm time.
+ */
+ if (rtc->rtc && rtc->rtc->aie_timer.enabled == 0)
+ return sprd_rtc_read_aux_alarm(dev, alrm);
+
+ ret = sprd_rtc_get_secs(rtc, SPRD_RTC_ALARM, &secs);
+ if (ret)
+ return ret;
+
+ rtc_time64_to_tm(secs, &alrm->time);
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_INT_EN, &val);
+ if (ret)
+ return ret;
+
+ alrm->enabled = !!(val & SPRD_RTC_ALARM_EN);
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_INT_RAW_STS, &val);
+ if (ret)
+ return ret;
+
+ alrm->pending = !!(val & SPRD_RTC_ALARM_EN);
+ return 0;
+}
+
+static int sprd_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ time64_t secs = rtc_tm_to_time64(&alrm->time);
+ struct rtc_time aie_time =
+ rtc_ktime_to_tm(rtc->rtc->aie_timer.node.expires);
+ int ret;
+
+ /*
+ * We have 2 groups alarms: normal alarm and auxiliary alarm. Since
+ * both normal alarm event and auxiliary alarm event can wake up system
+ * from deep sleep, but only alarm event can power up system from power
+ * down status. Moreover we do not need to poll about 125ms when
+ * updating auxiliary alarm registers. Thus we usually set auxiliary
+ * alarm when wake up system from deep sleep, and for other scenarios,
+ * we should set normal alarm with polling status.
+ *
+ * So here we check if the alarm time is set by aie_timer, if yes, we
+ * should set normal alarm, if not, we should set auxiliary alarm which
+ * means it is just a wake event.
+ */
+ if (!rtc->rtc->aie_timer.enabled || rtc_tm_sub(&aie_time, &alrm->time))
+ return sprd_rtc_set_aux_alarm(dev, alrm);
+
+ /* clear the alarm interrupt status firstly */
+ ret = regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ SPRD_RTC_ALARM_EN);
+ if (ret)
+ return ret;
+
+ ret = sprd_rtc_set_secs(rtc, SPRD_RTC_ALARM, secs);
+ if (ret)
+ return ret;
+
+ if (alrm->enabled) {
+ ret = regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_ALARM_EN,
+ SPRD_RTC_ALARM_EN);
+ if (ret)
+ return ret;
+
+ /* unlock the alarm to enable the alarm function. */
+ ret = sprd_rtc_lock_alarm(rtc, false);
+ } else {
+ regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_ALARM_EN, 0);
+
+ /*
+ * Lock the alarm function in case fake alarm event will power
+ * up systems.
+ */
+ ret = sprd_rtc_lock_alarm(rtc, true);
+ }
+
+ return ret;
+}
+
+static int sprd_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+ struct sprd_rtc *rtc = dev_get_drvdata(dev);
+ int ret;
+
+ if (enabled) {
+ ret = regmap_update_bits(rtc->regmap,
+ rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_ALARM_EN | SPRD_RTC_AUXALM_EN,
+ SPRD_RTC_ALARM_EN | SPRD_RTC_AUXALM_EN);
+ if (ret)
+ return ret;
+
+ ret = sprd_rtc_lock_alarm(rtc, false);
+ } else {
+ regmap_update_bits(rtc->regmap, rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_ALARM_EN | SPRD_RTC_AUXALM_EN, 0);
+
+ ret = sprd_rtc_lock_alarm(rtc, true);
+ }
+
+ return ret;
+}
+
+static const struct rtc_class_ops sprd_rtc_ops = {
+ .read_time = sprd_rtc_read_time,
+ .set_time = sprd_rtc_set_time,
+ .read_alarm = sprd_rtc_read_alarm,
+ .set_alarm = sprd_rtc_set_alarm,
+ .alarm_irq_enable = sprd_rtc_alarm_irq_enable,
+};
+
+static irqreturn_t sprd_rtc_handler(int irq, void *dev_id)
+{
+ struct sprd_rtc *rtc = dev_id;
+ int ret;
+
+ ret = sprd_rtc_clear_alarm_ints(rtc);
+ if (ret)
+ return IRQ_RETVAL(ret);
+
+ rtc_update_irq(rtc->rtc, 1, RTC_AF | RTC_IRQF);
+ return IRQ_HANDLED;
+}
+
+static int sprd_rtc_check_power_down(struct sprd_rtc *rtc)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_SPG_VALUE, &val);
+ if (ret)
+ return ret;
+
+ /*
+ * If the SPRD_RTC_POWER_RESET_FLAG was not set, which means the RTC has
+ * been powered down, so the RTC time values are invalid.
+ */
+ rtc->valid = (val & SPRD_RTC_POWER_RESET_FLAG) ? true : false;
+ return 0;
+}
+
+static int sprd_rtc_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct sprd_rtc *rtc;
+ int ret;
+
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
+ if (!rtc)
+ return -ENOMEM;
+
+ rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!rtc->regmap)
+ return -ENODEV;
+
+ ret = of_property_read_u32(node, "reg", &rtc->base);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get RTC base address\n");
+ return ret;
+ }
+
+ rtc->irq = platform_get_irq(pdev, 0);
+ if (rtc->irq < 0) {
+ dev_err(&pdev->dev, "failed to get RTC irq number\n");
+ return rtc->irq;
+ }
+
+ rtc->dev = &pdev->dev;
+ platform_set_drvdata(pdev, rtc);
+
+ /* clear all RTC interrupts and disable all RTC interrupts */
+ ret = sprd_rtc_disable_ints(rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to disable RTC interrupts\n");
+ return ret;
+ }
+
+ /* check if RTC time values are valid */
+ ret = sprd_rtc_check_power_down(rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to check RTC time values\n");
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
+ sprd_rtc_handler,
+ IRQF_ONESHOT | IRQF_EARLY_RESUME,
+ pdev->name, rtc);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to request RTC irq\n");
+ return ret;
+ }
+
+ rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &sprd_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc->rtc))
+ return PTR_ERR(rtc->rtc);
+
+ device_init_wakeup(&pdev->dev, 1);
+ return 0;
+}
+
+static int sprd_rtc_remove(struct platform_device *pdev)
+{
+ device_init_wakeup(&pdev->dev, 0);
+ return 0;
+}
+
+static const struct of_device_id sprd_rtc_of_match[] = {
+ { .compatible = "sprd,sc2731-rtc", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sprd_rtc_of_match);
+
+static struct platform_driver sprd_rtc_driver = {
+ .driver = {
+ .name = "sprd-rtc",
+ .of_match_table = sprd_rtc_of_match,
+ },
+ .probe = sprd_rtc_probe,
+ .remove = sprd_rtc_remove,
+};
+module_platform_driver(sprd_rtc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Spreadtrum RTC Device Driver");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index e364550..92ff2ed 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -72,9 +72,10 @@
retval = rtc_read_time(to_rtc_device(dev), &tm);
if (retval == 0) {
- unsigned long time;
- rtc_tm_to_time(&tm, &time);
- retval = sprintf(buf, "%lu\n", time);
+ time64_t time;
+
+ time = rtc_tm_to_time64(&tm);
+ retval = sprintf(buf, "%lld\n", time);
}
return retval;
@@ -132,7 +133,7 @@
wakealarm_show(struct device *dev, struct device_attribute *attr, char *buf)
{
ssize_t retval;
- unsigned long alarm;
+ time64_t alarm;
struct rtc_wkalrm alm;
/* Don't show disabled alarms. For uniformity, RTC alarms are
@@ -145,8 +146,8 @@
*/
retval = rtc_read_alarm(to_rtc_device(dev), &alm);
if (retval == 0 && alm.enabled) {
- rtc_tm_to_time(&alm.time, &alarm);
- retval = sprintf(buf, "%lu\n", alarm);
+ alarm = rtc_tm_to_time64(&alm.time);
+ retval = sprintf(buf, "%lld\n", alarm);
}
return retval;
@@ -157,8 +158,8 @@
const char *buf, size_t n)
{
ssize_t retval;
- unsigned long now, alarm;
- unsigned long push = 0;
+ time64_t now, alarm;
+ time64_t push = 0;
struct rtc_wkalrm alm;
struct rtc_device *rtc = to_rtc_device(dev);
const char *buf_ptr;
@@ -170,7 +171,7 @@
retval = rtc_read_time(rtc, &alm.time);
if (retval < 0)
return retval;
- rtc_tm_to_time(&alm.time, &now);
+ now = rtc_tm_to_time64(&alm.time);
buf_ptr = buf;
if (*buf_ptr == '+') {
@@ -181,7 +182,7 @@
} else
adjust = 1;
}
- retval = kstrtoul(buf_ptr, 0, &alarm);
+ retval = kstrtos64(buf_ptr, 0, &alarm);
if (retval)
return retval;
if (adjust) {
@@ -197,7 +198,7 @@
return retval;
if (alm.enabled) {
if (push) {
- rtc_tm_to_time(&alm.time, &push);
+ push = rtc_tm_to_time64(&alm.time);
alarm += push;
} else
return -EBUSY;
@@ -212,7 +213,7 @@
*/
alarm = now + 300;
}
- rtc_time_to_tm(alarm, &alm.time);
+ rtc_time64_to_tm(alarm, &alm.time);
retval = rtc_set_alarm(rtc, &alm);
return (retval < 0) ? retval : n;
diff --git a/drivers/rtc/rtc-xgene.c b/drivers/rtc/rtc-xgene.c
index 65b432a..0c34d3b 100644
--- a/drivers/rtc/rtc-xgene.c
+++ b/drivers/rtc/rtc-xgene.c
@@ -52,6 +52,7 @@
void __iomem *csr_base;
struct clk *clk;
unsigned int irq_wake;
+ unsigned int irq_enabled;
};
static int xgene_rtc_read_time(struct device *dev, struct rtc_time *tm)
@@ -104,15 +105,19 @@
return 0;
}
+static int xgene_rtc_alarm_irq_enabled(struct device *dev)
+{
+ struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
+
+ return readl(pdata->csr_base + RTC_CCR) & RTC_CCR_IE ? 1 : 0;
+}
+
static int xgene_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
- unsigned long rtc_time;
unsigned long alarm_time;
- rtc_time = readl(pdata->csr_base + RTC_CCVR);
rtc_tm_to_time(&alrm->time, &alarm_time);
-
pdata->alarm_time = alarm_time;
writel((u32) pdata->alarm_time, pdata->csr_base + RTC_CMR);
@@ -180,12 +185,18 @@
dev_err(&pdev->dev, "Couldn't get the clock for RTC\n");
return -ENODEV;
}
- clk_prepare_enable(pdata->clk);
+ ret = clk_prepare_enable(pdata->clk);
+ if (ret)
+ return ret;
/* Turn on the clock and the crystal */
writel(RTC_CCR_EN, pdata->csr_base + RTC_CCR);
- device_init_wakeup(&pdev->dev, 1);
+ ret = device_init_wakeup(&pdev->dev, 1);
+ if (ret) {
+ clk_disable_unprepare(pdata->clk);
+ return ret;
+ }
pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&xgene_rtc_ops, THIS_MODULE);
@@ -210,45 +221,55 @@
return 0;
}
-#ifdef CONFIG_PM_SLEEP
-static int xgene_rtc_suspend(struct device *dev)
+static int __maybe_unused xgene_rtc_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev);
int irq;
irq = platform_get_irq(pdev, 0);
+
+ /*
+ * If this RTC alarm will be used for waking the system up,
+ * don't disable it of course. Else we just disable the alarm
+ * and await suspension.
+ */
if (device_may_wakeup(&pdev->dev)) {
if (!enable_irq_wake(irq))
pdata->irq_wake = 1;
} else {
+ pdata->irq_enabled = xgene_rtc_alarm_irq_enabled(dev);
xgene_rtc_alarm_irq_enable(dev, 0);
- clk_disable(pdata->clk);
+ clk_disable_unprepare(pdata->clk);
}
-
return 0;
}
-static int xgene_rtc_resume(struct device *dev)
+static int __maybe_unused xgene_rtc_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev);
int irq;
+ int rc;
irq = platform_get_irq(pdev, 0);
+
if (device_may_wakeup(&pdev->dev)) {
if (pdata->irq_wake) {
disable_irq_wake(irq);
pdata->irq_wake = 0;
}
} else {
- clk_enable(pdata->clk);
- xgene_rtc_alarm_irq_enable(dev, 1);
+ rc = clk_prepare_enable(pdata->clk);
+ if (rc) {
+ dev_err(dev, "Unable to enable clock error %d\n", rc);
+ return rc;
+ }
+ xgene_rtc_alarm_irq_enable(dev, pdata->irq_enabled);
}
return 0;
}
-#endif
static SIMPLE_DEV_PM_OPS(xgene_rtc_pm_ops, xgene_rtc_suspend, xgene_rtc_resume);