| /* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * 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/module.h> |
| #include <linux/init.h> |
| #include <linux/rtc.h> |
| #include <linux/pm.h> |
| #include <linux/slab.h> |
| #include <linux/idr.h> |
| #include <linux/of_device.h> |
| #include <linux/spmi.h> |
| #include <linux/spinlock.h> |
| #include <linux/spmi.h> |
| |
| /* RTC/ALARM Register offsets */ |
| #define REG_OFFSET_ALARM_RW 0x40 |
| #define REG_OFFSET_ALARM_CTRL1 0x46 |
| #define REG_OFFSET_ALARM_CTRL2 0x48 |
| #define REG_OFFSET_RTC_WRITE 0x40 |
| #define REG_OFFSET_RTC_CTRL 0x46 |
| #define REG_OFFSET_RTC_READ 0x48 |
| #define REG_OFFSET_PERP_SUBTYPE 0x05 |
| |
| /* RTC_CTRL register bit fields */ |
| #define BIT_RTC_ENABLE BIT(7) |
| #define BIT_RTC_ALARM_ENABLE BIT(7) |
| #define BIT_RTC_ABORT_ENABLE BIT(0) |
| #define BIT_RTC_ALARM_CLEAR BIT(0) |
| |
| /* RTC/ALARM peripheral subtype values */ |
| #define RTC_PERPH_SUBTYPE 0x1 |
| #define ALARM_PERPH_SUBTYPE 0x3 |
| |
| #define NUM_8_BIT_RTC_REGS 0x4 |
| |
| #define TO_SECS(arr) (arr[0] | (arr[1] << 8) | (arr[2] << 16) | \ |
| (arr[3] << 24)) |
| |
| /* Module parameter to control power-on-alarm */ |
| static bool poweron_alarm; |
| module_param(poweron_alarm, bool, 0644); |
| MODULE_PARM_DESC(poweron_alarm, "Enable/Disable power-on alarm"); |
| |
| /* rtc driver internal structure */ |
| struct qpnp_rtc { |
| u8 rtc_ctrl_reg; |
| u8 alarm_ctrl_reg1; |
| u16 rtc_base; |
| u16 alarm_base; |
| u32 rtc_write_enable; |
| u32 rtc_alarm_powerup; |
| int rtc_alarm_irq; |
| struct device *rtc_dev; |
| struct rtc_device *rtc; |
| struct spmi_device *spmi; |
| spinlock_t alarm_ctrl_lock; |
| }; |
| |
| static int qpnp_read_wrapper(struct qpnp_rtc *rtc_dd, u8 *rtc_val, |
| u16 base, int count) |
| { |
| int rc; |
| struct spmi_device *spmi = rtc_dd->spmi; |
| |
| rc = spmi_ext_register_readl(spmi->ctrl, spmi->sid, base, rtc_val, |
| count); |
| if (rc) { |
| dev_err(rtc_dd->rtc_dev, "SPMI read failed\n"); |
| return rc; |
| } |
| return 0; |
| } |
| |
| static int qpnp_write_wrapper(struct qpnp_rtc *rtc_dd, u8 *rtc_val, |
| u16 base, int count) |
| { |
| int rc; |
| struct spmi_device *spmi = rtc_dd->spmi; |
| |
| rc = spmi_ext_register_writel(spmi->ctrl, spmi->sid, base, rtc_val, |
| count); |
| if (rc) { |
| dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| qpnp_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| { |
| int rc; |
| unsigned long secs, irq_flags; |
| u8 value[4], reg = 0, alarm_enabled = 0, ctrl_reg; |
| u8 rtc_disabled = 0, rtc_ctrl_reg; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); |
| |
| rtc_tm_to_time(tm, &secs); |
| |
| value[0] = secs & 0xFF; |
| value[1] = (secs >> 8) & 0xFF; |
| value[2] = (secs >> 16) & 0xFF; |
| value[3] = (secs >> 24) & 0xFF; |
| |
| dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); |
| |
| spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| ctrl_reg = rtc_dd->alarm_ctrl_reg1; |
| |
| if (ctrl_reg & BIT_RTC_ALARM_ENABLE) { |
| alarm_enabled = 1; |
| ctrl_reg &= ~BIT_RTC_ALARM_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(dev, "Write to ALARM ctrl reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| } else |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| |
| /* |
| * 32 bit seconds value is coverted to four 8 bit values |
| * |<------ 32 bit time value in seconds ------>| |
| * <- 8 bit ->|<- 8 bit ->|<- 8 bit ->|<- 8 bit ->| |
| * ---------------------------------------------- |
| * | BYTE[3] | BYTE[2] | BYTE[1] | BYTE[0] | |
| * ---------------------------------------------- |
| * |
| * RTC has four 8 bit registers for writting time in seconds: |
| * WDATA[3], WDATA[2], WDATA[1], WDATA[0] |
| * |
| * Write to the RTC registers should be done in following order |
| * Clear WDATA[0] register |
| * |
| * Write BYTE[1], BYTE[2] and BYTE[3] of time to |
| * RTC WDATA[3], WDATA[2], WDATA[1] registers |
| * |
| * Write BYTE[0] of time to RTC WDATA[0] register |
| * |
| * Clearing BYTE[0] and writting in the end will prevent any |
| * unintentional overflow from WDATA[0] to higher bytes during the |
| * write operation |
| */ |
| |
| /* Disable RTC H/w before writing on RTC register*/ |
| rtc_ctrl_reg = rtc_dd->rtc_ctrl_reg; |
| if (rtc_ctrl_reg & BIT_RTC_ENABLE) { |
| rtc_disabled = 1; |
| rtc_ctrl_reg &= ~BIT_RTC_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, &rtc_ctrl_reg, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); |
| if (rc) { |
| dev_err(dev, |
| "Disabling of RTC control reg failed" |
| " with error:%d\n", rc); |
| goto rtc_rw_fail; |
| } |
| rtc_dd->rtc_ctrl_reg = rtc_ctrl_reg; |
| } |
| |
| /* Clear WDATA[0] */ |
| reg = 0x0; |
| rc = qpnp_write_wrapper(rtc_dd, ®, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE, 1); |
| if (rc) { |
| dev_err(dev, "Write to RTC reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| /* Write to WDATA[3], WDATA[2] and WDATA[1] */ |
| rc = qpnp_write_wrapper(rtc_dd, &value[1], |
| rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE + 1, 3); |
| if (rc) { |
| dev_err(dev, "Write to RTC reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| /* Write to WDATA[0] */ |
| rc = qpnp_write_wrapper(rtc_dd, value, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE, 1); |
| if (rc) { |
| dev_err(dev, "Write to RTC reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| /* Enable RTC H/w after writing on RTC register*/ |
| if (rtc_disabled) { |
| rtc_ctrl_reg |= BIT_RTC_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, &rtc_ctrl_reg, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); |
| if (rc) { |
| dev_err(dev, |
| "Enabling of RTC control reg failed" |
| " with error:%d\n", rc); |
| goto rtc_rw_fail; |
| } |
| rtc_dd->rtc_ctrl_reg = rtc_ctrl_reg; |
| } |
| |
| if (alarm_enabled) { |
| ctrl_reg |= BIT_RTC_ALARM_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(dev, "Write to ALARM ctrl reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| } |
| |
| rtc_dd->alarm_ctrl_reg1 = ctrl_reg; |
| |
| rtc_rw_fail: |
| if (alarm_enabled) |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| |
| return rc; |
| } |
| |
| static int |
| qpnp_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| { |
| int rc; |
| u8 value[4], reg; |
| unsigned long secs; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); |
| |
| rc = qpnp_read_wrapper(rtc_dd, value, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_READ, |
| NUM_8_BIT_RTC_REGS); |
| if (rc) { |
| dev_err(dev, "Read from RTC reg failed\n"); |
| return rc; |
| } |
| |
| /* |
| * Read the LSB again and check if there has been a carry over |
| * If there is, redo the read operation |
| */ |
| rc = qpnp_read_wrapper(rtc_dd, ®, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_READ, 1); |
| if (rc) { |
| dev_err(dev, "Read from RTC reg failed\n"); |
| return rc; |
| } |
| |
| if (reg < value[0]) { |
| rc = qpnp_read_wrapper(rtc_dd, value, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_READ, |
| NUM_8_BIT_RTC_REGS); |
| if (rc) { |
| dev_err(dev, "Read from RTC reg failed\n"); |
| return rc; |
| } |
| } |
| |
| secs = TO_SECS(value); |
| |
| rtc_time_to_tm(secs, tm); |
| |
| rc = rtc_valid_tm(tm); |
| if (rc) { |
| dev_err(dev, "Invalid time read from RTC\n"); |
| return rc; |
| } |
| |
| dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n", |
| secs, tm->tm_hour, tm->tm_min, tm->tm_sec, |
| tm->tm_mday, tm->tm_mon, tm->tm_year); |
| |
| return 0; |
| } |
| |
| static int |
| qpnp_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
| { |
| int rc; |
| u8 value[4], ctrl_reg; |
| unsigned long secs, secs_rtc, irq_flags; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); |
| struct rtc_time rtc_tm; |
| |
| rtc_tm_to_time(&alarm->time, &secs); |
| |
| /* |
| * Read the current RTC time and verify if the alarm time is in the |
| * past. If yes, return invalid |
| */ |
| rc = qpnp_rtc_read_time(dev, &rtc_tm); |
| if (rc) { |
| dev_err(dev, "Unable to read RTC time\n"); |
| return -EINVAL; |
| } |
| |
| rtc_tm_to_time(&rtc_tm, &secs_rtc); |
| if (secs < secs_rtc) { |
| dev_err(dev, "Trying to set alarm in the past\n"); |
| return -EINVAL; |
| } |
| |
| value[0] = secs & 0xFF; |
| value[1] = (secs >> 8) & 0xFF; |
| value[2] = (secs >> 16) & 0xFF; |
| value[3] = (secs >> 24) & 0xFF; |
| |
| spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| |
| rc = qpnp_write_wrapper(rtc_dd, value, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, |
| NUM_8_BIT_RTC_REGS); |
| if (rc) { |
| dev_err(dev, "Write to ALARM reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| ctrl_reg = (alarm->enabled) ? |
| (rtc_dd->alarm_ctrl_reg1 | BIT_RTC_ALARM_ENABLE) : |
| (rtc_dd->alarm_ctrl_reg1 & ~BIT_RTC_ALARM_ENABLE); |
| |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(dev, "Write to ALARM cntrol reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| rtc_dd->alarm_ctrl_reg1 = ctrl_reg; |
| |
| dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", |
| alarm->time.tm_hour, alarm->time.tm_min, |
| alarm->time.tm_sec, alarm->time.tm_mday, |
| alarm->time.tm_mon, alarm->time.tm_year); |
| rtc_rw_fail: |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| return rc; |
| } |
| |
| static int |
| qpnp_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
| { |
| int rc; |
| u8 value[4]; |
| unsigned long secs; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); |
| |
| rc = qpnp_read_wrapper(rtc_dd, value, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, |
| NUM_8_BIT_RTC_REGS); |
| if (rc) { |
| dev_err(dev, "Read from ALARM reg failed\n"); |
| return rc; |
| } |
| |
| secs = TO_SECS(value); |
| rtc_time_to_tm(secs, &alarm->time); |
| |
| rc = rtc_valid_tm(&alarm->time); |
| if (rc) { |
| dev_err(dev, "Invalid time read from RTC\n"); |
| return rc; |
| } |
| |
| dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", |
| alarm->time.tm_hour, alarm->time.tm_min, |
| alarm->time.tm_sec, alarm->time.tm_mday, |
| alarm->time.tm_mon, alarm->time.tm_year); |
| |
| return 0; |
| } |
| |
| |
| static int |
| qpnp_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
| { |
| int rc; |
| unsigned long irq_flags; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); |
| u8 ctrl_reg; |
| |
| spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| ctrl_reg = rtc_dd->alarm_ctrl_reg1; |
| ctrl_reg = enabled ? (ctrl_reg | BIT_RTC_ALARM_ENABLE) : |
| (ctrl_reg & ~BIT_RTC_ALARM_ENABLE); |
| |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(dev, "Write to ALARM control reg failed\n"); |
| goto rtc_rw_fail; |
| } |
| |
| rtc_dd->alarm_ctrl_reg1 = ctrl_reg; |
| |
| rtc_rw_fail: |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| return rc; |
| } |
| |
| static struct rtc_class_ops qpnp_rtc_ops = { |
| .read_time = qpnp_rtc_read_time, |
| .set_alarm = qpnp_rtc_set_alarm, |
| .read_alarm = qpnp_rtc_read_alarm, |
| .alarm_irq_enable = qpnp_rtc_alarm_irq_enable, |
| }; |
| |
| static irqreturn_t qpnp_alarm_trigger(int irq, void *dev_id) |
| { |
| struct qpnp_rtc *rtc_dd = dev_id; |
| u8 ctrl_reg; |
| int rc; |
| unsigned long irq_flags; |
| |
| rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); |
| |
| spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| |
| /* Clear the alarm enable bit */ |
| ctrl_reg = rtc_dd->alarm_ctrl_reg1; |
| ctrl_reg &= ~BIT_RTC_ALARM_ENABLE; |
| |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| dev_err(rtc_dd->rtc_dev, |
| "Write to ALARM control reg failed\n"); |
| goto rtc_alarm_handled; |
| } |
| |
| rtc_dd->alarm_ctrl_reg1 = ctrl_reg; |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| |
| /* Set ALARM_CLR bit */ |
| ctrl_reg = 0x1; |
| rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL2, 1); |
| if (rc) |
| dev_err(rtc_dd->rtc_dev, |
| "Write to ALARM control reg failed\n"); |
| |
| rtc_alarm_handled: |
| return IRQ_HANDLED; |
| } |
| |
| static int __devinit qpnp_rtc_probe(struct spmi_device *spmi) |
| { |
| int rc; |
| u8 subtype; |
| struct qpnp_rtc *rtc_dd; |
| struct resource *resource; |
| struct spmi_resource *spmi_resource; |
| |
| rtc_dd = devm_kzalloc(&spmi->dev, sizeof(*rtc_dd), GFP_KERNEL); |
| if (rtc_dd == NULL) { |
| dev_err(&spmi->dev, "Unable to allocate memory!\n"); |
| return -ENOMEM; |
| } |
| |
| /* Get the rtc write property */ |
| rc = of_property_read_u32(spmi->dev.of_node, "qcom,qpnp-rtc-write", |
| &rtc_dd->rtc_write_enable); |
| if (rc && rc != -EINVAL) { |
| dev_err(&spmi->dev, |
| "Error reading rtc_write_enable property %d\n", rc); |
| return rc; |
| } |
| |
| rc = of_property_read_u32(spmi->dev.of_node, |
| "qcom,qpnp-rtc-alarm-pwrup", |
| &rtc_dd->rtc_alarm_powerup); |
| if (rc && rc != -EINVAL) { |
| dev_err(&spmi->dev, |
| "Error reading rtc_alarm_powerup property %d\n", rc); |
| return rc; |
| } |
| |
| /* Initialise spinlock to protect RTC control register */ |
| spin_lock_init(&rtc_dd->alarm_ctrl_lock); |
| |
| rtc_dd->rtc_dev = &(spmi->dev); |
| rtc_dd->spmi = spmi; |
| |
| /* Get RTC/ALARM resources */ |
| spmi_for_each_container_dev(spmi_resource, spmi) { |
| if (!spmi_resource) { |
| dev_err(&spmi->dev, |
| "%s: rtc_alarm: spmi resource absent!\n", |
| __func__); |
| rc = -ENXIO; |
| goto fail_rtc_enable; |
| } |
| |
| resource = spmi_get_resource(spmi, spmi_resource, |
| IORESOURCE_MEM, 0); |
| if (!(resource && resource->start)) { |
| dev_err(&spmi->dev, |
| "%s: node %s IO resource absent!\n", |
| __func__, spmi->dev.of_node->full_name); |
| rc = -ENXIO; |
| goto fail_rtc_enable; |
| } |
| |
| rc = qpnp_read_wrapper(rtc_dd, &subtype, |
| resource->start + REG_OFFSET_PERP_SUBTYPE, 1); |
| if (rc) { |
| dev_err(&spmi->dev, |
| "Peripheral subtype read failed\n"); |
| goto fail_rtc_enable; |
| } |
| |
| switch (subtype) { |
| case RTC_PERPH_SUBTYPE: |
| rtc_dd->rtc_base = resource->start; |
| break; |
| case ALARM_PERPH_SUBTYPE: |
| rtc_dd->alarm_base = resource->start; |
| rtc_dd->rtc_alarm_irq = |
| spmi_get_irq(spmi, spmi_resource, 0); |
| if (rtc_dd->rtc_alarm_irq < 0) { |
| dev_err(&spmi->dev, "ALARM IRQ absent\n"); |
| rc = -ENXIO; |
| goto fail_rtc_enable; |
| } |
| break; |
| default: |
| dev_err(&spmi->dev, "Invalid peripheral subtype\n"); |
| rc = -EINVAL; |
| goto fail_rtc_enable; |
| } |
| } |
| |
| rc = qpnp_read_wrapper(rtc_dd, &rtc_dd->rtc_ctrl_reg, |
| rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); |
| if (rc) { |
| dev_err(&spmi->dev, |
| "Read from RTC control reg failed\n"); |
| goto fail_rtc_enable; |
| } |
| |
| if (!(rtc_dd->rtc_ctrl_reg & BIT_RTC_ENABLE)) { |
| dev_err(&spmi->dev, |
| "RTC h/w disabled, rtc not registered\n"); |
| goto fail_rtc_enable; |
| } |
| |
| rc = qpnp_read_wrapper(rtc_dd, &rtc_dd->alarm_ctrl_reg1, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(&spmi->dev, |
| "Read from Alarm control reg failed\n"); |
| goto fail_rtc_enable; |
| } |
| /* Enable abort enable feature */ |
| rtc_dd->alarm_ctrl_reg1 |= BIT_RTC_ABORT_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, &rtc_dd->alarm_ctrl_reg1, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(&spmi->dev, "SPMI write failed!\n"); |
| goto fail_rtc_enable; |
| } |
| |
| if (rtc_dd->rtc_write_enable == true) |
| qpnp_rtc_ops.set_time = qpnp_rtc_set_time; |
| |
| dev_set_drvdata(&spmi->dev, rtc_dd); |
| |
| /* Register the RTC device */ |
| rtc_dd->rtc = rtc_device_register("qpnp_rtc", &spmi->dev, |
| &qpnp_rtc_ops, THIS_MODULE); |
| if (IS_ERR(rtc_dd->rtc)) { |
| dev_err(&spmi->dev, "%s: RTC registration failed (%ld)\n", |
| __func__, PTR_ERR(rtc_dd->rtc)); |
| rc = PTR_ERR(rtc_dd->rtc); |
| goto fail_rtc_enable; |
| } |
| |
| /* Request the alarm IRQ */ |
| rc = request_any_context_irq(rtc_dd->rtc_alarm_irq, |
| qpnp_alarm_trigger, IRQF_TRIGGER_RISING, |
| "qpnp_rtc_alarm", rtc_dd); |
| if (rc) { |
| dev_err(&spmi->dev, "Request IRQ failed (%d)\n", rc); |
| goto fail_req_irq; |
| } |
| |
| device_init_wakeup(&spmi->dev, 1); |
| enable_irq_wake(rtc_dd->rtc_alarm_irq); |
| |
| dev_dbg(&spmi->dev, "Probe success !!\n"); |
| |
| return 0; |
| |
| fail_req_irq: |
| rtc_device_unregister(rtc_dd->rtc); |
| fail_rtc_enable: |
| dev_set_drvdata(&spmi->dev, NULL); |
| |
| return rc; |
| } |
| |
| static int __devexit qpnp_rtc_remove(struct spmi_device *spmi) |
| { |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(&spmi->dev); |
| |
| device_init_wakeup(&spmi->dev, 0); |
| free_irq(rtc_dd->rtc_alarm_irq, rtc_dd); |
| rtc_device_unregister(rtc_dd->rtc); |
| dev_set_drvdata(&spmi->dev, NULL); |
| |
| return 0; |
| } |
| |
| static void qpnp_rtc_shutdown(struct spmi_device *spmi) |
| { |
| u8 value[4] = {0}; |
| u8 reg; |
| int rc; |
| unsigned long irq_flags; |
| struct qpnp_rtc *rtc_dd = dev_get_drvdata(&spmi->dev); |
| bool rtc_alarm_powerup = rtc_dd->rtc_alarm_powerup; |
| |
| if (!rtc_alarm_powerup && !poweron_alarm) { |
| spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| dev_dbg(&spmi->dev, "Disabling alarm interrupts\n"); |
| |
| /* Disable RTC alarms */ |
| reg = rtc_dd->alarm_ctrl_reg1; |
| reg &= ~BIT_RTC_ALARM_ENABLE; |
| rc = qpnp_write_wrapper(rtc_dd, ®, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); |
| if (rc) { |
| dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); |
| goto fail_alarm_disable; |
| } |
| |
| /* Clear Alarm register */ |
| rc = qpnp_write_wrapper(rtc_dd, value, |
| rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, |
| NUM_8_BIT_RTC_REGS); |
| if (rc) |
| dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); |
| |
| fail_alarm_disable: |
| spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); |
| } |
| } |
| |
| static struct of_device_id spmi_match_table[] = { |
| { |
| .compatible = "qcom,qpnp-rtc", |
| }, |
| {} |
| }; |
| |
| static struct spmi_driver qpnp_rtc_driver = { |
| .probe = qpnp_rtc_probe, |
| .remove = __devexit_p(qpnp_rtc_remove), |
| .shutdown = qpnp_rtc_shutdown, |
| .driver = { |
| .name = "qcom,qpnp-rtc", |
| .owner = THIS_MODULE, |
| .of_match_table = spmi_match_table, |
| }, |
| }; |
| |
| static int __init qpnp_rtc_init(void) |
| { |
| return spmi_driver_register(&qpnp_rtc_driver); |
| } |
| module_init(qpnp_rtc_init); |
| |
| static void __exit qpnp_rtc_exit(void) |
| { |
| spmi_driver_unregister(&qpnp_rtc_driver); |
| } |
| module_exit(qpnp_rtc_exit); |
| |
| MODULE_DESCRIPTION("SMPI PMIC RTC driver"); |
| MODULE_LICENSE("GPL V2"); |