#include <asm/irq.h>
#include "rtc-s3c.h"
-enum s3c_cpu_type {
- TYPE_S3C2410,
- TYPE_S3C2416,
- TYPE_S3C2443,
- TYPE_S3C64XX,
-};
+struct s3c_rtc {
+ struct device *dev;
+ struct rtc_device *rtc;
-struct s3c_rtc_drv_data {
- int cpu_type;
-};
+ void __iomem *base;
+ struct clk *rtc_clk;
+ struct clk *rtc_src_clk;
+ bool enabled;
+
+ struct s3c_rtc_data *data;
-/* I have yet to find an S3C implementation with more than one
- * of these rtc blocks in */
+ int irq_alarm;
+ int irq_tick;
-static struct clk *rtc_clk;
-static void __iomem *s3c_rtc_base;
-static int s3c_rtc_alarmno;
-static int s3c_rtc_tickno;
-static enum s3c_cpu_type s3c_rtc_cpu_type;
+ spinlock_t pie_lock;
+ spinlock_t alarm_clk_lock;
-static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
+ int ticnt_save, ticnt_en_save;
+ bool wake_en;
+};
+
+struct s3c_rtc_data {
+ int max_user_freq;
+ bool needs_src_clk;
+
+ void (*irq_handler) (struct s3c_rtc *info, int mask);
+ void (*set_freq) (struct s3c_rtc *info, int freq);
+ void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq);
+ void (*select_tick_clk) (struct s3c_rtc *info);
+ void (*save_tick_cnt) (struct s3c_rtc *info);
+ void (*restore_tick_cnt) (struct s3c_rtc *info);
+ void (*enable) (struct s3c_rtc *info);
+ void (*disable) (struct s3c_rtc *info);
+};
-static void s3c_rtc_alarm_clk_enable(bool enable)
+static void s3c_rtc_alarm_clk_enable(struct s3c_rtc *info, 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);
+ spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
if (enable) {
- if (!alarm_clk_enabled) {
- clk_enable(rtc_clk);
- alarm_clk_enabled = true;
+ if (!info->enabled) {
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ info->enabled = true;
}
} else {
- if (alarm_clk_enabled) {
- clk_disable(rtc_clk);
- alarm_clk_enabled = false;
+ if (info->enabled) {
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+ info->enabled = false;
}
}
- spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
+ spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
}
/* IRQ Handlers */
-
-static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
+static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
{
- 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);
+ struct s3c_rtc *info = (struct s3c_rtc *)id;
- s3c_rtc_alarm_clk_enable(false);
+ if (info->data->irq_handler)
+ info->data->irq_handler(info, S3C2410_INTP_TIC);
return IRQ_HANDLED;
}
-static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
+static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
{
- struct rtc_device *rdev = id;
+ struct s3c_rtc *info = (struct s3c_rtc *)id;
- clk_enable(rtc_clk);
- rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+ if (info->data->irq_handler)
+ info->data->irq_handler(info, S3C2410_INTP_ALM);
- 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 int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
{
+ struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int tmp;
- dev_dbg(dev, "%s: aie=%d\n", __func__, enabled);
+ dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
- clk_enable(rtc_clk);
- tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
if (enabled)
tmp |= S3C2410_RTCALM_ALMEN;
- writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
- clk_disable(rtc_clk);
+ writeb(tmp, info->base + S3C2410_RTCALM);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
- s3c_rtc_alarm_clk_enable(enabled);
+ s3c_rtc_alarm_clk_enable(info, enabled);
return 0;
}
-static int s3c_rtc_setfreq(struct device *dev, int freq)
+/* Set RTC frequency */
+static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
- unsigned int tmp = 0;
- int val;
-
if (!is_power_of_2(freq))
return -EINVAL;
- clk_enable(rtc_clk);
- spin_lock_irq(&s3c_rtc_pie_lock);
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ spin_lock_irq(&info->pie_lock);
- if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
- tmp = readb(s3c_rtc_base + S3C2410_TICNT);
- tmp &= S3C2410_TICNT_ENABLE;
- }
+ if (info->data->set_freq)
+ info->data->set_freq(info, freq);
- val = (rtc_dev->max_user_freq / freq) - 1;
-
- if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
- tmp |= S3C2443_TICNT_PART(val);
- writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1);
-
- if (s3c_rtc_cpu_type == TYPE_S3C2416)
- writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2);
- } else {
- tmp |= val;
- }
-
- writel(tmp, s3c_rtc_base + S3C2410_TICNT);
- spin_unlock_irq(&s3c_rtc_pie_lock);
- clk_disable(rtc_clk);
+ spin_unlock_irq(&info->pie_lock);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
return 0;
}
/* Time read/write */
-
static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
{
+ struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int have_retried = 0;
- void __iomem *base = s3c_rtc_base;
- clk_enable(rtc_clk);
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
retry_get_time:
- rtc_tm->tm_min = readb(base + S3C2410_RTCMIN);
- rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
- rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE);
- rtc_tm->tm_mon = readb(base + S3C2410_RTCMON);
- rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR);
- rtc_tm->tm_sec = readb(base + S3C2410_RTCSEC);
+ rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
+ rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
+ rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
+ rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON);
+ rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
+ rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
/* the only way to work out whether the system was mid-update
* when we read it is to check the second counter, and if it
rtc_tm->tm_mon -= 1;
- clk_disable(rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->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;
+ struct s3c_rtc *info = dev_get_drvdata(dev);
int year = tm->tm_year - 100;
dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
return -EINVAL;
}
- 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);
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
+ writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
+ writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
+ writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
+ writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
+ writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON);
+ writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
return 0;
}
static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
+ struct s3c_rtc *info = dev_get_drvdata(dev);
struct rtc_time *alm_tm = &alrm->time;
- 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);
- alm_tm->tm_mon = readb(base + S3C2410_ALMMON);
- alm_tm->tm_mday = readb(base + S3C2410_ALMDATE);
- alm_tm->tm_year = readb(base + S3C2410_ALMYEAR);
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
- alm_en = readb(base + S3C2410_RTCALM);
+ alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
+ alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
+ alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
+ alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
+ alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
+ alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
+
+ alm_en = readb(info->base + S3C2410_RTCALM);
alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
else
alm_tm->tm_year = -1;
- clk_disable(rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+
return 0;
}
static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
+ struct s3c_rtc *info = dev_get_drvdata(dev);
struct rtc_time *tm = &alrm->time;
- void __iomem *base = s3c_rtc_base;
unsigned int alrm_en;
- clk_enable(rtc_clk);
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
alrm->enabled,
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);
+ alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
+ writeb(0x00, info->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), info->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), info->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), info->base + S3C2410_ALMHOUR);
}
dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
- writeb(alrm_en, base + S3C2410_RTCALM);
+ writeb(alrm_en, info->base + S3C2410_RTCALM);
s3c_rtc_setaie(dev, alrm->enabled);
- clk_disable(rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+
return 0;
}
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
- unsigned int ticnt;
+ struct s3c_rtc *info = dev_get_drvdata(dev);
- 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;
- }
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
+ if (info->data->enable_tick)
+ info->data->enable_tick(info, seq);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
- seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
- clk_disable(rtc_clk);
return 0;
}
.alarm_irq_enable = s3c_rtc_setaie,
};
-static void s3c_rtc_enable(struct platform_device *pdev, int en)
+static void s3c24xx_rtc_enable(struct s3c_rtc *info)
{
- void __iomem *base = s3c_rtc_base;
- unsigned int tmp;
+ unsigned int con, tmp;
- if (s3c_rtc_base == NULL)
- return;
-
- clk_enable(rtc_clk);
- if (!en) {
- 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_S3C64XX) {
- tmp = readb(base + S3C2410_TICNT);
- tmp &= ~S3C2410_TICNT_ENABLE;
- writeb(tmp, base + S3C2410_TICNT);
- }
- } else {
- /* re-enable the device, and check it is ok */
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
- if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
- dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+ con = readw(info->base + S3C2410_RTCCON);
+ /* re-enable the device, and check it is ok */
+ if ((con & S3C2410_RTCCON_RTCEN) == 0) {
+ dev_info(info->dev, "rtc disabled, re-enabling\n");
- tmp = readw(base + S3C2410_RTCCON);
- writew(tmp | S3C2410_RTCCON_RTCEN,
- base + S3C2410_RTCCON);
- }
+ tmp = readw(info->base + S3C2410_RTCCON);
+ writew(tmp | S3C2410_RTCCON_RTCEN,
+ info->base + S3C2410_RTCCON);
+ }
- if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
- dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
+ if (con & S3C2410_RTCCON_CNTSEL) {
+ dev_info(info->dev, "removing RTCCON_CNTSEL\n");
- tmp = readw(base + S3C2410_RTCCON);
- writew(tmp & ~S3C2410_RTCCON_CNTSEL,
- base + S3C2410_RTCCON);
- }
+ tmp = readw(info->base + S3C2410_RTCCON);
+ writew(tmp & ~S3C2410_RTCCON_CNTSEL,
+ info->base + S3C2410_RTCCON);
+ }
- if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
- dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
+ if (con & S3C2410_RTCCON_CLKRST) {
+ dev_info(info->dev, "removing RTCCON_CLKRST\n");
- tmp = readw(base + S3C2410_RTCCON);
- writew(tmp & ~S3C2410_RTCCON_CLKRST,
- base + S3C2410_RTCCON);
- }
+ tmp = readw(info->base + S3C2410_RTCCON);
+ writew(tmp & ~S3C2410_RTCCON_CLKRST,
+ info->base + S3C2410_RTCCON);
}
- clk_disable(rtc_clk);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
}
-static int s3c_rtc_remove(struct platform_device *dev)
+static void s3c24xx_rtc_disable(struct s3c_rtc *info)
{
- s3c_rtc_setaie(&dev->dev, 0);
+ unsigned int con;
+
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
+ con = readw(info->base + S3C2410_RTCCON);
+ con &= ~S3C2410_RTCCON_RTCEN;
+ writew(con, info->base + S3C2410_RTCCON);
- clk_unprepare(rtc_clk);
- rtc_clk = NULL;
+ con = readb(info->base + S3C2410_TICNT);
+ con &= ~S3C2410_TICNT_ENABLE;
+ writeb(con, info->base + S3C2410_TICNT);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+}
+
+static void s3c6410_rtc_disable(struct s3c_rtc *info)
+{
+ unsigned int con;
+
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+
+ con = readw(info->base + S3C2410_RTCCON);
+ con &= ~S3C64XX_RTCCON_TICEN;
+ con &= ~S3C2410_RTCCON_RTCEN;
+ writew(con, info->base + S3C2410_RTCCON);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+}
+
+static int s3c_rtc_remove(struct platform_device *pdev)
+{
+ struct s3c_rtc *info = platform_get_drvdata(pdev);
+
+ s3c_rtc_setaie(info->dev, 0);
+
+ clk_unprepare(info->rtc_clk);
+ info->rtc_clk = NULL;
return 0;
}
static const struct of_device_id s3c_rtc_dt_match[];
-static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
+static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
{
-#ifdef CONFIG_OF
- struct s3c_rtc_drv_data *data;
- if (pdev->dev.of_node) {
- const struct of_device_id *match;
- match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
- data = (struct s3c_rtc_drv_data *) match->data;
- return data->cpu_type;
- }
-#endif
- return platform_get_device_id(pdev)->driver_data;
+ const struct of_device_id *match;
+
+ match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
+ return (struct s3c_rtc_data *)match->data;
}
static int s3c_rtc_probe(struct platform_device *pdev)
{
- struct rtc_device *rtc;
+ struct s3c_rtc *info = NULL;
struct rtc_time rtc_tm;
struct resource *res;
int ret;
- int tmp;
- dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev);
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
/* find the IRQs */
-
- s3c_rtc_tickno = platform_get_irq(pdev, 1);
- if (s3c_rtc_tickno < 0) {
+ info->irq_tick = platform_get_irq(pdev, 1);
+ if (info->irq_tick < 0) {
dev_err(&pdev->dev, "no irq for rtc tick\n");
- return s3c_rtc_tickno;
+ return info->irq_tick;
+ }
+
+ info->dev = &pdev->dev;
+ info->data = s3c_rtc_get_data(pdev);
+ if (!info->data) {
+ dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
+ return -EINVAL;
}
+ spin_lock_init(&info->pie_lock);
+ spin_lock_init(&info->alarm_clk_lock);
+
+ platform_set_drvdata(pdev, info);
- s3c_rtc_alarmno = platform_get_irq(pdev, 0);
- if (s3c_rtc_alarmno < 0) {
+ info->irq_alarm = platform_get_irq(pdev, 0);
+ if (info->irq_alarm < 0) {
dev_err(&pdev->dev, "no irq for alarm\n");
- return s3c_rtc_alarmno;
+ return info->irq_alarm;
}
dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
- s3c_rtc_tickno, s3c_rtc_alarmno);
+ info->irq_tick, info->irq_alarm);
/* get the memory region */
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(s3c_rtc_base))
- return PTR_ERR(s3c_rtc_base);
-
- rtc_clk = devm_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;
- return ret;
+ info->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->base))
+ return PTR_ERR(info->base);
+
+ info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
+ if (IS_ERR(info->rtc_clk)) {
+ dev_err(&pdev->dev, "failed to find rtc clock\n");
+ return PTR_ERR(info->rtc_clk);
}
+ clk_prepare_enable(info->rtc_clk);
- clk_prepare_enable(rtc_clk);
+ info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
+ if (IS_ERR(info->rtc_src_clk)) {
+ dev_err(&pdev->dev, "failed to find rtc source clock\n");
+ return PTR_ERR(info->rtc_src_clk);
+ }
+ clk_prepare_enable(info->rtc_src_clk);
- /* check to see if everything is setup correctly */
- s3c_rtc_enable(pdev, 1);
+ /* check to see if everything is setup correctly */
+ if (info->data->enable)
+ info->data->enable(info);
dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
- readw(s3c_rtc_base + S3C2410_RTCCON));
+ readw(info->base + S3C2410_RTCCON));
device_init_wakeup(&pdev->dev, 1);
/* register RTC and exit */
-
- rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
+ info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
THIS_MODULE);
-
- if (IS_ERR(rtc)) {
+ if (IS_ERR(info->rtc)) {
dev_err(&pdev->dev, "cannot attach rtc\n");
- ret = PTR_ERR(rtc);
+ ret = PTR_ERR(info->rtc);
goto err_nortc;
}
- s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev);
+ ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
+ 0, "s3c2410-rtc alarm", info);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
+ goto err_nortc;
+ }
- /* Check RTC Time */
+ ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq,
+ 0, "s3c2410-rtc tick", info);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret);
+ goto err_nortc;
+ }
- s3c_rtc_gettime(NULL, &rtc_tm);
+ /* Check RTC Time */
+ s3c_rtc_gettime(&pdev->dev, &rtc_tm);
if (rtc_valid_tm(&rtc_tm)) {
rtc_tm.tm_year = 100;
rtc_tm.tm_min = 0;
rtc_tm.tm_sec = 0;
- s3c_rtc_settime(NULL, &rtc_tm);
+ s3c_rtc_settime(&pdev->dev, &rtc_tm);
dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
}
- if (s3c_rtc_cpu_type != TYPE_S3C2410)
- rtc->max_user_freq = 32768;
- else
- rtc->max_user_freq = 128;
-
- if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
- tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
- tmp |= S3C2443_RTCCON_TICSEL;
- writew(tmp, s3c_rtc_base + S3C2410_RTCCON);
- }
+ if (info->data->select_tick_clk)
+ info->data->select_tick_clk(info);
- platform_set_drvdata(pdev, rtc);
+ s3c_rtc_setfreq(info, 1);
- s3c_rtc_setfreq(&pdev->dev, 1);
-
- ret = devm_request_irq(&pdev->dev, s3c_rtc_alarmno, s3c_rtc_alarmirq,
- 0, "s3c2410-rtc alarm", rtc);
- if (ret) {
- dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
- goto err_nortc;
- }
-
- ret = devm_request_irq(&pdev->dev, s3c_rtc_tickno, s3c_rtc_tickirq,
- 0, "s3c2410-rtc tick", rtc);
- if (ret) {
- dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
- goto err_nortc;
- }
-
- clk_disable(rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
return 0;
err_nortc:
- s3c_rtc_enable(pdev, 0);
- clk_disable_unprepare(rtc_clk);
+ if (info->data->disable)
+ info->data->disable(info);
+ clk_disable_unprepare(info->rtc_clk);
return ret;
}
#ifdef CONFIG_PM_SLEEP
-/* RTC Power management control */
-
-static int ticnt_save, ticnt_en_save;
-static bool wake_en;
static int s3c_rtc_suspend(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
+ struct s3c_rtc *info = dev_get_drvdata(dev);
+
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
- clk_enable(rtc_clk);
/* save TICNT for anyone using periodic interrupts */
- if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
- ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
- ticnt_en_save &= S3C64XX_RTCCON_TICEN;
- ticnt_save = readl(s3c_rtc_base + S3C2410_TICNT);
- } else {
- ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
- }
- s3c_rtc_enable(pdev, 0);
+ if (info->data->save_tick_cnt)
+ info->data->save_tick_cnt(info);
+
+ if (info->data->disable)
+ info->data->disable(info);
- if (device_may_wakeup(dev) && !wake_en) {
- if (enable_irq_wake(s3c_rtc_alarmno) == 0)
- wake_en = true;
+ if (device_may_wakeup(dev) && !info->wake_en) {
+ if (enable_irq_wake(info->irq_alarm) == 0)
+ info->wake_en = true;
else
dev_err(dev, "enable_irq_wake failed\n");
}
- clk_disable(rtc_clk);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
return 0;
}
static int s3c_rtc_resume(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- unsigned int tmp;
+ struct s3c_rtc *info = dev_get_drvdata(dev);
- clk_enable(rtc_clk);
- s3c_rtc_enable(pdev, 1);
- if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
- writel(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
- if (ticnt_en_save) {
- tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
- writew(tmp | ticnt_en_save,
- s3c_rtc_base + S3C2410_RTCCON);
- }
- } else {
- writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
- }
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
- if (device_may_wakeup(dev) && wake_en) {
- disable_irq_wake(s3c_rtc_alarmno);
- wake_en = false;
+ if (info->data->enable)
+ info->data->enable(info);
+
+ if (info->data->restore_tick_cnt)
+ info->data->restore_tick_cnt(info);
+
+ if (device_may_wakeup(dev) && info->wake_en) {
+ disable_irq_wake(info->irq_alarm);
+ info->wake_en = false;
}
- clk_disable(rtc_clk);
+
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
return 0;
}
#endif
-
static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
-#ifdef CONFIG_OF
-static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
- [TYPE_S3C2410] = { TYPE_S3C2410 },
- [TYPE_S3C2416] = { TYPE_S3C2416 },
- [TYPE_S3C2443] = { TYPE_S3C2443 },
- [TYPE_S3C64XX] = { TYPE_S3C64XX },
+static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
+{
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+
+ s3c_rtc_alarm_clk_enable(info, false);
+}
+
+static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
+{
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
+ writeb(mask, info->base + S3C2410_INTP);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+
+ s3c_rtc_alarm_clk_enable(info, false);
+}
+
+static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+ unsigned int tmp = 0;
+ int val;
+
+ tmp = readb(info->base + S3C2410_TICNT);
+ tmp &= S3C2410_TICNT_ENABLE;
+
+ val = (info->rtc->max_user_freq / freq) - 1;
+ tmp |= val;
+
+ writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+ unsigned int tmp = 0;
+ int val;
+
+ tmp = readb(info->base + S3C2410_TICNT);
+ tmp &= S3C2410_TICNT_ENABLE;
+
+ val = (info->rtc->max_user_freq / freq) - 1;
+
+ tmp |= S3C2443_TICNT_PART(val);
+ writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
+
+ writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
+
+ writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+ unsigned int tmp = 0;
+ int val;
+
+ tmp = readb(info->base + S3C2410_TICNT);
+ tmp &= S3C2410_TICNT_ENABLE;
+
+ val = (info->rtc->max_user_freq / freq) - 1;
+
+ tmp |= S3C2443_TICNT_PART(val);
+ writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
+
+ writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+ int val;
+
+ val = (info->rtc->max_user_freq / freq) - 1;
+ writel(val, info->base + S3C2410_TICNT);
+}
+
+static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
+{
+ unsigned int ticnt;
+
+ ticnt = readb(info->base + S3C2410_TICNT);
+ ticnt &= S3C2410_TICNT_ENABLE;
+
+ seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
+}
+
+static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
+{
+ unsigned int con;
+
+ con = readw(info->base + S3C2410_RTCCON);
+ con |= S3C2443_RTCCON_TICSEL;
+ writew(con, info->base + S3C2410_RTCCON);
+}
+
+static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
+{
+ unsigned int ticnt;
+
+ ticnt = readw(info->base + S3C2410_RTCCON);
+ ticnt &= S3C64XX_RTCCON_TICEN;
+
+ seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
+}
+
+static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
+{
+ info->ticnt_save = readb(info->base + S3C2410_TICNT);
+}
+
+static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
+{
+ writeb(info->ticnt_save, info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
+{
+ info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
+ info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
+ info->ticnt_save = readl(info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
+{
+ unsigned int con;
+
+ writel(info->ticnt_save, info->base + S3C2410_TICNT);
+ if (info->ticnt_en_save) {
+ con = readw(info->base + S3C2410_RTCCON);
+ writew(con | info->ticnt_en_save,
+ info->base + S3C2410_RTCCON);
+ }
+}
+
+static struct s3c_rtc_data const s3c2410_rtc_data = {
+ .max_user_freq = 128,
+ .irq_handler = s3c24xx_rtc_irq,
+ .set_freq = s3c2410_rtc_setfreq,
+ .enable_tick = s3c24xx_rtc_enable_tick,
+ .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
+ .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
+ .enable = s3c24xx_rtc_enable,
+ .disable = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c2416_rtc_data = {
+ .max_user_freq = 32768,
+ .irq_handler = s3c24xx_rtc_irq,
+ .set_freq = s3c2416_rtc_setfreq,
+ .enable_tick = s3c24xx_rtc_enable_tick,
+ .select_tick_clk = s3c2416_rtc_select_tick_clk,
+ .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
+ .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
+ .enable = s3c24xx_rtc_enable,
+ .disable = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c2443_rtc_data = {
+ .max_user_freq = 32768,
+ .irq_handler = s3c24xx_rtc_irq,
+ .set_freq = s3c2443_rtc_setfreq,
+ .enable_tick = s3c24xx_rtc_enable_tick,
+ .select_tick_clk = s3c2416_rtc_select_tick_clk,
+ .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
+ .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
+ .enable = s3c24xx_rtc_enable,
+ .disable = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c6410_rtc_data = {
+ .max_user_freq = 32768,
+ .irq_handler = s3c6410_rtc_irq,
+ .set_freq = s3c6410_rtc_setfreq,
+ .enable_tick = s3c6410_rtc_enable_tick,
+ .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
+ .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
+ .enable = s3c24xx_rtc_enable,
+ .disable = s3c6410_rtc_disable,
+};
+
+static struct s3c_rtc_data const exynos3250_rtc_data = {
+ .max_user_freq = 32768,
+ .needs_src_clk = true,
+ .irq_handler = s3c6410_rtc_irq,
+ .set_freq = s3c6410_rtc_setfreq,
+ .enable_tick = s3c6410_rtc_enable_tick,
+ .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
+ .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
+ .enable = s3c24xx_rtc_enable,
+ .disable = s3c6410_rtc_disable,
};
static const struct of_device_id s3c_rtc_dt_match[] = {
{
.compatible = "samsung,s3c2410-rtc",
- .data = &s3c_rtc_drv_data_array[TYPE_S3C2410],
+ .data = (void *)&s3c2410_rtc_data,
}, {
.compatible = "samsung,s3c2416-rtc",
- .data = &s3c_rtc_drv_data_array[TYPE_S3C2416],
+ .data = (void *)&s3c2416_rtc_data,
}, {
.compatible = "samsung,s3c2443-rtc",
- .data = &s3c_rtc_drv_data_array[TYPE_S3C2443],
+ .data = (void *)&s3c2443_rtc_data,
}, {
.compatible = "samsung,s3c6410-rtc",
- .data = &s3c_rtc_drv_data_array[TYPE_S3C64XX],
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
-#endif
-
-static struct platform_device_id s3c_rtc_driver_ids[] = {
- {
- .name = "s3c2410-rtc",
- .driver_data = TYPE_S3C2410,
- }, {
- .name = "s3c2416-rtc",
- .driver_data = TYPE_S3C2416,
- }, {
- .name = "s3c2443-rtc",
- .driver_data = TYPE_S3C2443,
+ .data = (void *)&s3c6410_rtc_data,
}, {
- .name = "s3c64xx-rtc",
- .driver_data = TYPE_S3C64XX,
+ .compatible = "samsung,exynos3250-rtc",
+ .data = (void *)&exynos3250_rtc_data,
},
- { }
+ { /* sentinel */ },
};
-
-MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
+MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
static struct platform_driver s3c_rtc_driver = {
.probe = s3c_rtc_probe,
.remove = s3c_rtc_remove,
- .id_table = s3c_rtc_driver_ids,
.driver = {
.name = "s3c-rtc",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(s3c_rtc_dt_match),
},
};
-
module_platform_driver(s3c_rtc_driver);
MODULE_DESCRIPTION("Samsung S3C RTC Driver");
projects / cascardo / linux.git / blobdiff