/* drivers/rtc/rtc-s3c.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
*
* Copyright (c) 2004,2006 Simtec Electronics
* Ben Dooks, <ben@simtec.co.uk>
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/clk.h>
+#include <linux/log2.h>
+#include <linux/slab.h>
-#include <asm/hardware.h>
+#include <mach/hardware.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
-#include <asm/rtc.h>
-
-#include <asm/mach/time.h>
+#include <plat/regs-rtc.h>
-#include <asm/plat-s3c/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 */
static struct resource *s3c_rtc_mem;
+static struct clk *rtc_clk;
static void __iomem *s3c_rtc_base;
static int s3c_rtc_alarmno = NO_IRQ;
static int s3c_rtc_tickno = NO_IRQ;
-static int s3c_rtc_freq = 1;
+static bool wake_en;
+static enum s3c_cpu_type s3c_rtc_cpu_type;
static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
-static unsigned int tick_count;
+
+static void s3c_rtc_alarm_clk_enable(bool enable)
+{
+ static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock);
+ static bool alarm_clk_enabled;
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags);
+ if (enable) {
+ if (!alarm_clk_enabled) {
+ clk_enable(rtc_clk);
+ alarm_clk_enabled = true;
+ }
+ } else {
+ if (alarm_clk_enabled) {
+ clk_disable(rtc_clk);
+ alarm_clk_enabled = false;
+ }
+ }
+ spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
+}
/* IRQ Handlers */
{
struct rtc_device *rdev = id;
+ clk_enable(rtc_clk);
rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
+
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
+
+ clk_disable(rtc_clk);
+
+ s3c_rtc_alarm_clk_enable(false);
+
return IRQ_HANDLED;
}
{
struct rtc_device *rdev = id;
- rtc_update_irq(rdev, tick_count++, RTC_PF | RTC_IRQF);
+ clk_enable(rtc_clk);
+ rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
+
+ clk_disable(rtc_clk);
return IRQ_HANDLED;
}
/* Update control registers */
-static void s3c_rtc_setaie(int to)
+static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
{
unsigned int tmp;
- pr_debug("%s: aie=%d\n", __FUNCTION__, to);
+ pr_debug("%s: aie=%d\n", __func__, enabled);
+ clk_enable(rtc_clk);
tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
- if (to)
+ if (enabled)
tmp |= S3C2410_RTCALM_ALMEN;
writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
-}
+ clk_disable(rtc_clk);
-static void s3c_rtc_setpie(int to)
-{
- unsigned int tmp;
-
- pr_debug("%s: pie=%d\n", __FUNCTION__, to);
-
- spin_lock_irq(&s3c_rtc_pie_lock);
- tmp = readb(s3c_rtc_base + S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
+ s3c_rtc_alarm_clk_enable(enabled);
- if (to)
- tmp |= S3C2410_TICNT_ENABLE;
-
- writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
- spin_unlock_irq(&s3c_rtc_pie_lock);
+ return 0;
}
-static void s3c_rtc_setfreq(int freq)
+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;
+ clk_enable(rtc_clk);
spin_lock_irq(&s3c_rtc_pie_lock);
- tmp = readb(s3c_rtc_base + S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
- s3c_rtc_freq = freq;
+ if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+ tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+ tmp &= S3C2410_TICNT_ENABLE;
+ }
- tmp |= (128 / freq)-1;
+ tmp |= (rtc_dev->max_user_freq / freq)-1;
- writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
+ writel(tmp, s3c_rtc_base + S3C2410_TICNT);
spin_unlock_irq(&s3c_rtc_pie_lock);
+ clk_disable(rtc_clk);
+
+ return 0;
}
/* Time read/write */
unsigned int have_retried = 0;
void __iomem *base = s3c_rtc_base;
+ clk_enable(rtc_clk);
retry_get_time:
rtc_tm->tm_min = readb(base + S3C2410_RTCMIN);
rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
goto retry_get_time;
}
- pr_debug("read time %02x.%02x.%02x %02x/%02x/%02x\n",
- rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
- rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
-
- BCD_TO_BIN(rtc_tm->tm_sec);
- BCD_TO_BIN(rtc_tm->tm_min);
- BCD_TO_BIN(rtc_tm->tm_hour);
- BCD_TO_BIN(rtc_tm->tm_mday);
- BCD_TO_BIN(rtc_tm->tm_mon);
- BCD_TO_BIN(rtc_tm->tm_year);
+ rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
+ rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
+ rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
+ rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
+ rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
+ rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
rtc_tm->tm_year += 100;
+
+ pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
+ 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
+ rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
+
rtc_tm->tm_mon -= 1;
- return 0;
+ clk_disable(rtc_clk);
+ return rtc_valid_tm(rtc_tm);
}
static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
void __iomem *base = s3c_rtc_base;
int year = tm->tm_year - 100;
- pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
- tm->tm_year, tm->tm_mon, tm->tm_mday,
+ pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
+ 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
/* we get around y2k by simply not supporting it */
return -EINVAL;
}
- writeb(BIN2BCD(tm->tm_sec), base + S3C2410_RTCSEC);
- writeb(BIN2BCD(tm->tm_min), base + S3C2410_RTCMIN);
- writeb(BIN2BCD(tm->tm_hour), base + S3C2410_RTCHOUR);
- writeb(BIN2BCD(tm->tm_mday), base + S3C2410_RTCDATE);
- writeb(BIN2BCD(tm->tm_mon + 1), base + S3C2410_RTCMON);
- writeb(BIN2BCD(year), base + S3C2410_RTCYEAR);
+ clk_enable(rtc_clk);
+ writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC);
+ writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN);
+ writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
+ writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE);
+ writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON);
+ writeb(bin2bcd(year), base + S3C2410_RTCYEAR);
+ clk_disable(rtc_clk);
return 0;
}
void __iomem *base = s3c_rtc_base;
unsigned int alm_en;
+ clk_enable(rtc_clk);
alm_tm->tm_sec = readb(base + S3C2410_ALMSEC);
alm_tm->tm_min = readb(base + S3C2410_ALMMIN);
alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR);
alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
- pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
+ pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
alm_en,
- alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
+ 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
/* decode the alarm enable field */
if (alm_en & S3C2410_RTCALM_SECEN)
- BCD_TO_BIN(alm_tm->tm_sec);
+ alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
else
- alm_tm->tm_sec = 0xff;
+ alm_tm->tm_sec = -1;
if (alm_en & S3C2410_RTCALM_MINEN)
- BCD_TO_BIN(alm_tm->tm_min);
+ alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
else
- alm_tm->tm_min = 0xff;
+ alm_tm->tm_min = -1;
if (alm_en & S3C2410_RTCALM_HOUREN)
- BCD_TO_BIN(alm_tm->tm_hour);
+ alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
else
- alm_tm->tm_hour = 0xff;
+ alm_tm->tm_hour = -1;
if (alm_en & S3C2410_RTCALM_DAYEN)
- BCD_TO_BIN(alm_tm->tm_mday);
+ alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
else
- alm_tm->tm_mday = 0xff;
+ alm_tm->tm_mday = -1;
if (alm_en & S3C2410_RTCALM_MONEN) {
- BCD_TO_BIN(alm_tm->tm_mon);
+ alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
alm_tm->tm_mon -= 1;
} else {
- alm_tm->tm_mon = 0xff;
+ alm_tm->tm_mon = -1;
}
if (alm_en & S3C2410_RTCALM_YEAREN)
- BCD_TO_BIN(alm_tm->tm_year);
+ alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
else
- alm_tm->tm_year = 0xffff;
+ alm_tm->tm_year = -1;
+ clk_disable(rtc_clk);
return 0;
}
void __iomem *base = s3c_rtc_base;
unsigned int alrm_en;
- pr_debug("s3c_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
+ clk_enable(rtc_clk);
+ pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
alrm->enabled,
- tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff,
- tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
-
+ 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec);
alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
writeb(0x00, base + S3C2410_RTCALM);
if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
alrm_en |= S3C2410_RTCALM_SECEN;
- writeb(BIN2BCD(tm->tm_sec), base + S3C2410_ALMSEC);
+ writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC);
}
if (tm->tm_min < 60 && tm->tm_min >= 0) {
alrm_en |= S3C2410_RTCALM_MINEN;
- writeb(BIN2BCD(tm->tm_min), base + S3C2410_ALMMIN);
+ writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN);
}
if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
alrm_en |= S3C2410_RTCALM_HOUREN;
- writeb(BIN2BCD(tm->tm_hour), base + S3C2410_ALMHOUR);
+ writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR);
}
pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
writeb(alrm_en, base + S3C2410_RTCALM);
- if (0) {
- alrm_en = readb(base + S3C2410_RTCALM);
- alrm_en &= ~S3C2410_RTCALM_ALMEN;
- writeb(alrm_en, base + S3C2410_RTCALM);
- disable_irq_wake(s3c_rtc_alarmno);
- }
-
- if (alrm->enabled)
- enable_irq_wake(s3c_rtc_alarmno);
- else
- disable_irq_wake(s3c_rtc_alarmno);
+ s3c_rtc_setaie(dev, alrm->enabled);
+ clk_disable(rtc_clk);
return 0;
}
-static int s3c_rtc_ioctl(struct device *dev,
- unsigned int cmd, unsigned long arg)
-{
- unsigned int ret = -ENOIOCTLCMD;
-
- switch (cmd) {
- case RTC_AIE_OFF:
- case RTC_AIE_ON:
- s3c_rtc_setaie((cmd == RTC_AIE_ON) ? 1 : 0);
- ret = 0;
- break;
-
- case RTC_PIE_OFF:
- case RTC_PIE_ON:
- tick_count = 0;
- s3c_rtc_setpie((cmd == RTC_PIE_ON) ? 1 : 0);
- ret = 0;
- break;
-
- case RTC_IRQP_READ:
- ret = put_user(s3c_rtc_freq, (unsigned long __user *)arg);
- break;
-
- case RTC_IRQP_SET:
- /* check for power of 2 */
-
- if ((arg & (arg-1)) != 0 || arg < 1) {
- ret = -EINVAL;
- goto exit;
- }
-
- pr_debug("s3c2410_rtc: setting frequency %ld\n", arg);
-
- s3c_rtc_setfreq(arg);
- ret = 0;
- break;
-
- case RTC_UIE_ON:
- case RTC_UIE_OFF:
- ret = -EINVAL;
- }
-
- exit:
- return ret;
-}
-
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
- unsigned int ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
-
- seq_printf(seq, "periodic_IRQ\t: %s\n",
- (ticnt & S3C2410_TICNT_ENABLE) ? "yes" : "no" );
-
- seq_printf(seq, "periodic_freq\t: %d\n", s3c_rtc_freq);
-
- return 0;
-}
-
-static int s3c_rtc_open(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
- int ret;
+ unsigned int ticnt;
- ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
- IRQF_DISABLED, "s3c2410-rtc alarm", rtc_dev);
-
- if (ret) {
- dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
- return ret;
- }
-
- ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
- IRQF_DISABLED, "s3c2410-rtc tick", rtc_dev);
-
- if (ret) {
- dev_err(dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
- goto tick_err;
+ clk_enable(rtc_clk);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+ ticnt = readw(s3c_rtc_base + S3C2410_RTCCON);
+ ticnt &= S3C64XX_RTCCON_TICEN;
+ } else {
+ ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
+ ticnt &= S3C2410_TICNT_ENABLE;
}
- return ret;
-
- tick_err:
- free_irq(s3c_rtc_alarmno, rtc_dev);
- return ret;
-}
-
-static void s3c_rtc_release(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
-
- /* do not clear AIE here, it may be needed for wake */
-
- s3c_rtc_setpie(0);
- free_irq(s3c_rtc_alarmno, rtc_dev);
- free_irq(s3c_rtc_tickno, rtc_dev);
+ seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
+ clk_disable(rtc_clk);
+ return 0;
}
static const struct rtc_class_ops s3c_rtcops = {
- .open = s3c_rtc_open,
- .release = s3c_rtc_release,
- .ioctl = s3c_rtc_ioctl,
.read_time = s3c_rtc_gettime,
.set_time = s3c_rtc_settime,
.read_alarm = s3c_rtc_getalarm,
.set_alarm = s3c_rtc_setalarm,
- .proc = s3c_rtc_proc,
+ .proc = s3c_rtc_proc,
+ .alarm_irq_enable = s3c_rtc_setaie,
};
static void s3c_rtc_enable(struct platform_device *pdev, int en)
if (s3c_rtc_base == NULL)
return;
+ clk_enable(rtc_clk);
if (!en) {
- tmp = readb(base + S3C2410_RTCCON);
- writeb(tmp & ~S3C2410_RTCCON_RTCEN, base + S3C2410_RTCCON);
-
- tmp = readb(base + S3C2410_TICNT);
- writeb(tmp & ~S3C2410_TICNT_ENABLE, base + S3C2410_TICNT);
+ tmp = readw(base + S3C2410_RTCCON);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ tmp &= ~S3C64XX_RTCCON_TICEN;
+ tmp &= ~S3C2410_RTCCON_RTCEN;
+ writew(tmp, base + S3C2410_RTCCON);
+
+ 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 */
- if ((readb(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){
+ if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
- tmp = readb(base + S3C2410_RTCCON);
- writeb(tmp|S3C2410_RTCCON_RTCEN, base+S3C2410_RTCCON);
+ tmp = readw(base + S3C2410_RTCCON);
+ writew(tmp | S3C2410_RTCCON_RTCEN,
+ base + S3C2410_RTCCON);
}
- if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){
+ if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
- tmp = readb(base + S3C2410_RTCCON);
- writeb(tmp& ~S3C2410_RTCCON_CNTSEL, base+S3C2410_RTCCON);
+ tmp = readw(base + S3C2410_RTCCON);
+ writew(tmp & ~S3C2410_RTCCON_CNTSEL,
+ base + S3C2410_RTCCON);
}
- if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){
+ if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
- tmp = readb(base + S3C2410_RTCCON);
- writeb(tmp & ~S3C2410_RTCCON_CLKRST, base+S3C2410_RTCCON);
+ tmp = readw(base + S3C2410_RTCCON);
+ writew(tmp & ~S3C2410_RTCCON_CLKRST,
+ base + S3C2410_RTCCON);
}
}
+ clk_disable(rtc_clk);
}
-static int s3c_rtc_remove(struct platform_device *dev)
+static int __devexit s3c_rtc_remove(struct platform_device *dev)
{
struct rtc_device *rtc = platform_get_drvdata(dev);
+ free_irq(s3c_rtc_alarmno, rtc);
+ free_irq(s3c_rtc_tickno, rtc);
+
platform_set_drvdata(dev, NULL);
rtc_device_unregister(rtc);
- s3c_rtc_setpie(0);
- s3c_rtc_setaie(0);
+ s3c_rtc_setaie(&dev->dev, 0);
+
+ clk_put(rtc_clk);
+ rtc_clk = NULL;
iounmap(s3c_rtc_base);
release_resource(s3c_rtc_mem);
return 0;
}
-static int s3c_rtc_probe(struct platform_device *pdev)
+static int __devinit s3c_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
+ struct rtc_time rtc_tm;
struct resource *res;
int ret;
- pr_debug("%s: probe=%p\n", __FUNCTION__, pdev);
+ pr_debug("%s: probe=%p\n", __func__, pdev);
/* find the IRQs */
return -ENOENT;
}
- s3c_rtc_mem = request_mem_region(res->start,
- res->end-res->start+1,
+ s3c_rtc_mem = request_mem_region(res->start, resource_size(res),
pdev->name);
if (s3c_rtc_mem == NULL) {
goto err_nores;
}
- s3c_rtc_base = ioremap(res->start, res->end - res->start + 1);
+ s3c_rtc_base = ioremap(res->start, resource_size(res));
if (s3c_rtc_base == NULL) {
dev_err(&pdev->dev, "failed ioremap()\n");
ret = -EINVAL;
goto err_nomap;
}
+ rtc_clk = clk_get(&pdev->dev, "rtc");
+ if (IS_ERR(rtc_clk)) {
+ dev_err(&pdev->dev, "failed to find rtc clock source\n");
+ ret = PTR_ERR(rtc_clk);
+ rtc_clk = NULL;
+ goto err_clk;
+ }
+
+ clk_enable(rtc_clk);
+
/* check to see if everything is setup correctly */
s3c_rtc_enable(pdev, 1);
- pr_debug("s3c2410_rtc: RTCCON=%02x\n",
- readb(s3c_rtc_base + S3C2410_RTCCON));
+ pr_debug("s3c2410_rtc: RTCCON=%02x\n",
+ readw(s3c_rtc_base + S3C2410_RTCCON));
- s3c_rtc_setfreq(s3c_rtc_freq);
+ device_init_wakeup(&pdev->dev, 1);
/* register RTC and exit */
goto err_nortc;
}
- rtc->max_user_freq = 128;
+ s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
+
+ /* Check RTC Time */
+
+ s3c_rtc_gettime(NULL, &rtc_tm);
+
+ if (rtc_valid_tm(&rtc_tm)) {
+ rtc_tm.tm_year = 100;
+ rtc_tm.tm_mon = 0;
+ rtc_tm.tm_mday = 1;
+ rtc_tm.tm_hour = 0;
+ rtc_tm.tm_min = 0;
+ rtc_tm.tm_sec = 0;
+
+ s3c_rtc_settime(NULL, &rtc_tm);
+
+ dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
+ }
+
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+ rtc->max_user_freq = 32768;
+ else
+ rtc->max_user_freq = 128;
platform_set_drvdata(pdev, rtc);
+
+ s3c_rtc_setfreq(&pdev->dev, 1);
+
+ ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
+ IRQF_DISABLED, "s3c2410-rtc alarm", rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
+ goto err_alarm_irq;
+ }
+
+ ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
+ IRQF_DISABLED, "s3c2410-rtc tick", rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
+ free_irq(s3c_rtc_alarmno, rtc);
+ goto err_tick_irq;
+ }
+
+ clk_disable(rtc_clk);
+
return 0;
+ err_tick_irq:
+ free_irq(s3c_rtc_alarmno, rtc);
+
+ err_alarm_irq:
+ platform_set_drvdata(pdev, NULL);
+ rtc_device_unregister(rtc);
+
err_nortc:
s3c_rtc_enable(pdev, 0);
+ clk_disable(rtc_clk);
+ clk_put(rtc_clk);
+
+ err_clk:
iounmap(s3c_rtc_base);
err_nomap:
/* RTC Power management control */
-static struct timespec s3c_rtc_delta;
-
-static int ticnt_save;
+static int ticnt_save, ticnt_en_save;
static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
{
+ clk_enable(rtc_clk);
/* 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 = readw(s3c_rtc_base + S3C2410_RTCCON);
+ ticnt_en_save &= S3C64XX_RTCCON_TICEN;
+ }
s3c_rtc_enable(pdev, 0);
+
+ if (device_may_wakeup(&pdev->dev) && !wake_en) {
+ if (enable_irq_wake(s3c_rtc_alarmno) == 0)
+ wake_en = true;
+ else
+ dev_err(&pdev->dev, "enable_irq_wake failed\n");
+ }
+ clk_disable(rtc_clk);
+
return 0;
}
static int s3c_rtc_resume(struct platform_device *pdev)
{
+ unsigned int tmp;
+
+ clk_enable(rtc_clk);
s3c_rtc_enable(pdev, 1);
writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
+ if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
+ tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
+ writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
+ }
+
+ if (device_may_wakeup(&pdev->dev) && wake_en) {
+ disable_irq_wake(s3c_rtc_alarmno);
+ wake_en = false;
+ }
+ clk_disable(rtc_clk);
+
return 0;
}
#else
#define s3c_rtc_resume NULL
#endif
-static struct platform_driver s3c2410_rtcdrv = {
+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 = s3c_rtc_remove,
+ .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,
},
};
static int __init s3c_rtc_init(void)
{
printk(banner);
- return platform_driver_register(&s3c2410_rtcdrv);
+ return platform_driver_register(&s3c_rtc_driver);
}
static void __exit s3c_rtc_exit(void)
{
- platform_driver_unregister(&s3c2410_rtcdrv);
+ platform_driver_unregister(&s3c_rtc_driver);
}
module_init(s3c_rtc_init);
MODULE_DESCRIPTION("Samsung S3C RTC Driver");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c2410-rtc");
Code Review / linux-2.6.git / blobdiff