s3c rtc driver: add support for S3C64xx
Add support for the S3C64xx SoC to the generic S3C RTC driver.
Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Cc: Frans Pop <elendil@planet.nl>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 4969b60..e5972b2 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -29,6 +29,11 @@
#include <asm/irq.h>
#include <plat/regs-rtc.h>
+enum s3c_cpu_type {
+ TYPE_S3C2410,
+ TYPE_S3C64XX,
+};
+
/* I have yet to find an S3C implementation with more than one
* of these rtc blocks in */
@@ -37,6 +42,7 @@
static void __iomem *s3c_rtc_base;
static int s3c_rtc_alarmno = NO_IRQ;
static int s3c_rtc_tickno = NO_IRQ;
+static enum s3c_cpu_type s3c_rtc_cpu_type;
static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
@@ -80,12 +86,25 @@
pr_debug("%s: pie=%d\n", __func__, enabled);
spin_lock_irq(&s3c_rtc_pie_lock);
- tmp = readb(s3c_rtc_base + S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
- if (enabled)
- tmp |= S3C2410_TICNT_ENABLE;
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+ tmp = readb(s3c_rtc_base + S3C2410_RTCCON);
+ tmp &= ~S3C64XX_RTCCON_TICEN;
- writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
+ if (enabled)
+ tmp |= S3C64XX_RTCCON_TICEN;
+
+ writeb(tmp, s3c_rtc_base + S3C2410_RTCCON);
+ } else {
+ tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+ tmp &= ~S3C2410_TICNT_ENABLE;
+
+ if (enabled)
+ tmp |= S3C2410_TICNT_ENABLE;
+
+ writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
+ }
+
spin_unlock_irq(&s3c_rtc_pie_lock);
return 0;
@@ -93,15 +112,21 @@
static int s3c_rtc_setfreq(struct device *dev, int freq)
{
- unsigned int tmp;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
+ unsigned int tmp = 0;
if (!is_power_of_2(freq))
return -EINVAL;
spin_lock_irq(&s3c_rtc_pie_lock);
- tmp = readb(s3c_rtc_base + S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
- tmp |= (128 / freq)-1;
+ if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+ tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+ tmp &= S3C2410_TICNT_ENABLE;
+ }
+
+ tmp |= (rtc_dev->max_user_freq / freq)-1;
writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
spin_unlock_irq(&s3c_rtc_pie_lock);
@@ -283,10 +308,17 @@
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
- unsigned int ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
+ unsigned int ticnt;
- seq_printf(seq, "periodic_IRQ\t: %s\n",
- (ticnt & S3C2410_TICNT_ENABLE) ? "yes" : "no" );
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+ ticnt = readb(s3c_rtc_base + S3C2410_RTCCON);
+ ticnt &= S3C64XX_RTCCON_TICEN;
+ } else {
+ ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
+ ticnt &= S3C2410_TICNT_ENABLE;
+ }
+
+ seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
return 0;
}
@@ -353,10 +385,16 @@
if (!en) {
tmp = readb(base + S3C2410_RTCCON);
- writeb(tmp & ~S3C2410_RTCCON_RTCEN, base + S3C2410_RTCCON);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ tmp &= ~S3C64XX_RTCCON_TICEN;
+ tmp &= ~S3C2410_RTCCON_RTCEN;
+ writeb(tmp, base + S3C2410_RTCCON);
- tmp = readb(base + S3C2410_TICNT);
- writeb(tmp & ~S3C2410_TICNT_ENABLE, base + S3C2410_TICNT);
+ if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+ tmp = readb(base + S3C2410_TICNT);
+ tmp &= ~S3C2410_TICNT_ENABLE;
+ writeb(tmp, base + S3C2410_TICNT);
+ }
} else {
/* re-enable the device, and check it is ok */
@@ -472,7 +510,12 @@
goto err_nortc;
}
- rtc->max_user_freq = 128;
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ rtc->max_user_freq = 32768;
+ else
+ rtc->max_user_freq = 128;
+
+ s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
platform_set_drvdata(pdev, rtc);
return 0;
@@ -492,20 +535,30 @@
/* RTC Power management control */
-static int ticnt_save;
+static int ticnt_save, ticnt_en_save;
static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
{
/* save TICNT for anyone using periodic interrupts */
ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+ ticnt_en_save = readb(s3c_rtc_base + S3C2410_RTCCON);
+ ticnt_en_save &= S3C64XX_RTCCON_TICEN;
+ }
s3c_rtc_enable(pdev, 0);
return 0;
}
static int s3c_rtc_resume(struct platform_device *pdev)
{
+ unsigned int tmp;
+
s3c_rtc_enable(pdev, 1);
writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
+ tmp = readb(s3c_rtc_base + S3C2410_RTCCON);
+ writeb(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
+ }
return 0;
}
#else
@@ -513,13 +566,27 @@
#define s3c_rtc_resume NULL
#endif
-static struct platform_driver s3c2410_rtc_driver = {
+static struct platform_device_id s3c_rtc_driver_ids[] = {
+ {
+ .name = "s3c2410-rtc",
+ .driver_data = TYPE_S3C2410,
+ }, {
+ .name = "s3c64xx-rtc",
+ .driver_data = TYPE_S3C64XX,
+ },
+ { }
+};
+
+MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
+
+static struct platform_driver s3c_rtc_driver = {
.probe = s3c_rtc_probe,
.remove = __devexit_p(s3c_rtc_remove),
.suspend = s3c_rtc_suspend,
.resume = s3c_rtc_resume,
+ .id_table = s3c_rtc_driver_ids,
.driver = {
- .name = "s3c2410-rtc",
+ .name = "s3c-rtc",
.owner = THIS_MODULE,
},
};
@@ -529,12 +596,12 @@
static int __init s3c_rtc_init(void)
{
printk(banner);
- return platform_driver_register(&s3c2410_rtc_driver);
+ return platform_driver_register(&s3c_rtc_driver);
}
static void __exit s3c_rtc_exit(void)
{
- platform_driver_unregister(&s3c2410_rtc_driver);
+ platform_driver_unregister(&s3c_rtc_driver);
}
module_init(s3c_rtc_init);