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rtc: s3c: define s3c_rtc structure to remove global variables. 

Define s3c_rtc structure including necessary variables for S3C RTC device
instead of global variables.  This patch improves the readability by
removing global variables.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chanwoo Choi 2014-10-13 15:52:28 -07:00 committed by Linus Torvalds
parent 473b864512
commit 19be09f51d
1 changed files with 216 additions and 215 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

431
drivers/rtc/rtc-s3c.c
View File

@ -43,125 +43,132 @@ struct s3c_rtc_drv_data {
int cpu_type; int cpu_type;
}; };
/* I have yet to find an S3C implementation with more than one struct s3c_rtc {
* of these rtc blocks in */ struct device *dev;
struct rtc_device *rtc;
static struct clk *rtc_clk; void __iomem *base;
static void __iomem *s3c_rtc_base; struct clk *rtc_clk;
static int s3c_rtc_alarmno; bool enabled;
static int s3c_rtc_tickno;
static enum s3c_cpu_type s3c_rtc_cpu_type;
static DEFINE_SPINLOCK(s3c_rtc_pie_lock); enum s3c_cpu_type cpu_type;
static void s3c_rtc_alarm_clk_enable(bool enable) int irq_alarm;
int irq_tick;
spinlock_t pie_lock;
spinlock_t alarm_clk_lock;
int ticnt_save, ticnt_en_save;
bool wake_en;
};
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; 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 (enable) {
if (!alarm_clk_enabled) { if (!info->enabled) {
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
alarm_clk_enabled = true; info->enabled = true;
} }
} else { } else {
if (alarm_clk_enabled) { if (info->enabled) {
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
alarm_clk_enabled = false; info->enabled = false;
} }
} }
spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags); spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
} }
/* IRQ Handlers */ /* IRQ Handlers */
static irqreturn_t s3c_rtc_alarmirq(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); clk_enable(info->rtc_clk);
rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
if (s3c_rtc_cpu_type == TYPE_S3C64XX) if (info->cpu_type == TYPE_S3C64XX)
writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); writeb(S3C2410_INTP_ALM, info->base + S3C2410_INTP);
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
s3c_rtc_alarm_clk_enable(false); s3c_rtc_alarm_clk_enable(info, false);
return IRQ_HANDLED; return IRQ_HANDLED;
} }
static irqreturn_t s3c_rtc_tickirq(int irq, void *id) static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
{ {
struct rtc_device *rdev = id; struct s3c_rtc *info = (struct s3c_rtc *)id;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); rtc_update_irq(info->rtc, 1, RTC_PF | RTC_IRQF);
if (s3c_rtc_cpu_type == TYPE_S3C64XX) if (info->cpu_type == TYPE_S3C64XX)
writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP); writeb(S3C2410_INTP_TIC, info->base + S3C2410_INTP);
clk_disable(info->rtc_clk);
clk_disable(rtc_clk);
return IRQ_HANDLED; return IRQ_HANDLED;
} }
/* Update control registers */ /* Update control registers */
static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
{ {
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int tmp; 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); clk_enable(info->rtc_clk);
tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
if (enabled) if (enabled)
tmp |= S3C2410_RTCALM_ALMEN; tmp |= S3C2410_RTCALM_ALMEN;
writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); writeb(tmp, info->base + S3C2410_RTCALM);
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
s3c_rtc_alarm_clk_enable(enabled); s3c_rtc_alarm_clk_enable(info, enabled);
return 0; return 0;
} }
static int s3c_rtc_setfreq(struct device *dev, int freq) 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; unsigned int tmp = 0;
int val; int val;
if (!is_power_of_2(freq)) if (!is_power_of_2(freq))
return -EINVAL; return -EINVAL;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
spin_lock_irq(&s3c_rtc_pie_lock); spin_lock_irq(&info->pie_lock);
if (s3c_rtc_cpu_type != TYPE_S3C64XX) { if (info->cpu_type != TYPE_S3C64XX) {
tmp = readb(s3c_rtc_base + S3C2410_TICNT); tmp = readb(info->base + S3C2410_TICNT);
tmp &= S3C2410_TICNT_ENABLE; tmp &= S3C2410_TICNT_ENABLE;
} }
val = (rtc_dev->max_user_freq / freq) - 1; val = (info->rtc->max_user_freq / freq) - 1;
if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { if (info->cpu_type == TYPE_S3C2416 || info->cpu_type == TYPE_S3C2443) {
tmp |= S3C2443_TICNT_PART(val); tmp |= S3C2443_TICNT_PART(val);
writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1); writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
if (s3c_rtc_cpu_type == TYPE_S3C2416) if (info->cpu_type == TYPE_S3C2416)
writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2); writel(S3C2416_TICNT2_PART(val),
info->base + S3C2416_TICNT2);
} else { } else {
tmp |= val; tmp |= val;
} }
writel(tmp, s3c_rtc_base + S3C2410_TICNT); writel(tmp, info->base + S3C2410_TICNT);
spin_unlock_irq(&s3c_rtc_pie_lock); spin_unlock_irq(&info->pie_lock);
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
@ -170,17 +177,17 @@ static int s3c_rtc_setfreq(struct device *dev, int freq)
static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) 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; unsigned int have_retried = 0;
void __iomem *base = s3c_rtc_base;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
retry_get_time: retry_get_time:
rtc_tm->tm_min = readb(base + S3C2410_RTCMIN); rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR); rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE); rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
rtc_tm->tm_mon = readb(base + S3C2410_RTCMON); rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON);
rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR); rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
rtc_tm->tm_sec = readb(base + S3C2410_RTCSEC); rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
/* the only way to work out whether the system was mid-update /* 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 * when we read it is to check the second counter, and if it
@ -207,13 +214,14 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
rtc_tm->tm_mon -= 1; rtc_tm->tm_mon -= 1;
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return rtc_valid_tm(rtc_tm); return rtc_valid_tm(rtc_tm);
} }
static int s3c_rtc_settime(struct device *dev, struct rtc_time *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; int year = tm->tm_year - 100;
dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n", dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
@ -227,33 +235,35 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
return -EINVAL; return -EINVAL;
} }
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC);
writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN); writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR); writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE); writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON); writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
writeb(bin2bcd(year), base + S3C2410_RTCYEAR); writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON);
clk_disable(rtc_clk); writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
clk_disable(info->rtc_clk);
return 0; return 0;
} }
static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) 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; struct rtc_time *alm_tm = &alrm->time;
void __iomem *base = s3c_rtc_base;
unsigned int alm_en; unsigned int alm_en;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
alm_tm->tm_sec = readb(base + S3C2410_ALMSEC); alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
alm_tm->tm_min = readb(base + S3C2410_ALMMIN); alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR); alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
alm_tm->tm_mon = readb(base + S3C2410_ALMMON); alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
alm_tm->tm_mday = readb(base + S3C2410_ALMDATE); alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
alm_tm->tm_year = readb(base + S3C2410_ALMYEAR); alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
alm_en = readb(base + S3C2410_RTCALM); alm_en = readb(info->base + S3C2410_RTCALM);
alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
@ -297,65 +307,67 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
else else
alm_tm->tm_year = -1; alm_tm->tm_year = -1;
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) 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; struct rtc_time *tm = &alrm->time;
void __iomem *base = s3c_rtc_base;
unsigned int alrm_en; unsigned int alrm_en;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
alrm->enabled, alrm->enabled,
1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec); tm->tm_hour, tm->tm_min, tm->tm_sec);
alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
writeb(0x00, base + S3C2410_RTCALM); writeb(0x00, info->base + S3C2410_RTCALM);
if (tm->tm_sec < 60 && tm->tm_sec >= 0) { if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
alrm_en |= S3C2410_RTCALM_SECEN; 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) { if (tm->tm_min < 60 && tm->tm_min >= 0) {
alrm_en |= S3C2410_RTCALM_MINEN; 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) { if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
alrm_en |= S3C2410_RTCALM_HOUREN; 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); 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); s3c_rtc_setaie(dev, alrm->enabled);
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{ {
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int ticnt; unsigned int ticnt;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
if (s3c_rtc_cpu_type == TYPE_S3C64XX) { if (info->cpu_type == TYPE_S3C64XX) {
ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt = readw(info->base + S3C2410_RTCCON);
ticnt &= S3C64XX_RTCCON_TICEN; ticnt &= S3C64XX_RTCCON_TICEN;
} else { } else {
ticnt = readb(s3c_rtc_base + S3C2410_TICNT); ticnt = readb(info->base + S3C2410_TICNT);
ticnt &= S3C2410_TICNT_ENABLE; ticnt &= S3C2410_TICNT_ENABLE;
} }
seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
@ -368,63 +380,61 @@ static const struct rtc_class_ops s3c_rtcops = {
.alarm_irq_enable = s3c_rtc_setaie, .alarm_irq_enable = s3c_rtc_setaie,
}; };
static void s3c_rtc_enable(struct platform_device *pdev, int en) static void s3c_rtc_enable(struct s3c_rtc *info, int en)
{ {
void __iomem *base = s3c_rtc_base;
unsigned int tmp; unsigned int tmp;
if (s3c_rtc_base == NULL) clk_enable(info->rtc_clk);
return;
clk_enable(rtc_clk);
if (!en) { if (!en) {
tmp = readw(base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
if (s3c_rtc_cpu_type == TYPE_S3C64XX) if (info->cpu_type == TYPE_S3C64XX)
tmp &= ~S3C64XX_RTCCON_TICEN; tmp &= ~S3C64XX_RTCCON_TICEN;
tmp &= ~S3C2410_RTCCON_RTCEN; tmp &= ~S3C2410_RTCCON_RTCEN;
writew(tmp, base + S3C2410_RTCCON); writew(tmp, info->base + S3C2410_RTCCON);
if (s3c_rtc_cpu_type != TYPE_S3C64XX) { if (info->cpu_type != TYPE_S3C64XX) {
tmp = readb(base + S3C2410_TICNT); tmp = readb(info->base + S3C2410_TICNT);
tmp &= ~S3C2410_TICNT_ENABLE; tmp &= ~S3C2410_TICNT_ENABLE;
writeb(tmp, base + S3C2410_TICNT); writeb(tmp, info->base + S3C2410_TICNT);
} }
} else { } else {
/* re-enable the device, and check it is ok */ /* re-enable the device, and check it is ok */
if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) { if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
dev_info(&pdev->dev, "rtc disabled, re-enabling\n"); dev_info(info->dev, "rtc disabled, re-enabling\n");
tmp = readw(base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp | S3C2410_RTCCON_RTCEN, writew(tmp | S3C2410_RTCCON_RTCEN,
base + S3C2410_RTCCON); info->base + S3C2410_RTCCON);
} }
if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) { if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n"); dev_info(info->dev, "removing RTCCON_CNTSEL\n");
tmp = readw(base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CNTSEL, writew(tmp & ~S3C2410_RTCCON_CNTSEL,
base + S3C2410_RTCCON); info->base + S3C2410_RTCCON);
} }
if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) { if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
dev_info(&pdev->dev, "removing RTCCON_CLKRST\n"); dev_info(info->dev, "removing RTCCON_CLKRST\n");
tmp = readw(base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CLKRST, writew(tmp & ~S3C2410_RTCCON_CLKRST,
base + S3C2410_RTCCON); info->base + S3C2410_RTCCON);
} }
} }
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
} }
static int s3c_rtc_remove(struct platform_device *dev) static int s3c_rtc_remove(struct platform_device *pdev)
{ {
s3c_rtc_setaie(&dev->dev, 0); struct s3c_rtc *info = platform_get_drvdata(pdev);
clk_unprepare(rtc_clk); s3c_rtc_setaie(info->dev, 0);
rtc_clk = NULL;
clk_unprepare(info->rtc_clk);
info->rtc_clk = NULL;
return 0; return 0;
} }
@ -447,73 +457,85 @@ static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
static int s3c_rtc_probe(struct platform_device *pdev) static int s3c_rtc_probe(struct platform_device *pdev)
{ {
struct rtc_device *rtc; struct s3c_rtc *info = NULL;
struct rtc_time rtc_tm; struct rtc_time rtc_tm;
struct resource *res; struct resource *res;
int ret; int ret;
int tmp; 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 */ /* find the IRQs */
info->irq_tick = platform_get_irq(pdev, 1);
s3c_rtc_tickno = platform_get_irq(pdev, 1); if (info->irq_tick < 0) {
if (s3c_rtc_tickno < 0) {
dev_err(&pdev->dev, "no irq for rtc tick\n"); dev_err(&pdev->dev, "no irq for rtc tick\n");
return s3c_rtc_tickno; return info->irq_tick;
} }
s3c_rtc_alarmno = platform_get_irq(pdev, 0); info->dev = &pdev->dev;
if (s3c_rtc_alarmno < 0) { info->cpu_type = s3c_rtc_get_driver_data(pdev);
spin_lock_init(&info->pie_lock);
spin_lock_init(&info->alarm_clk_lock);
platform_set_drvdata(pdev, info);
info->irq_alarm = platform_get_irq(pdev, 0);
if (info->irq_alarm < 0) {
dev_err(&pdev->dev, "no irq for alarm\n"); 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", 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 */ /* get the memory region */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res); info->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(s3c_rtc_base)) if (IS_ERR(info->base))
return PTR_ERR(s3c_rtc_base); return PTR_ERR(info->base);
rtc_clk = devm_clk_get(&pdev->dev, "rtc"); info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
if (IS_ERR(rtc_clk)) { if (IS_ERR(info->rtc_clk)) {
dev_err(&pdev->dev, "failed to find rtc clock source\n"); dev_err(&pdev->dev, "failed to find rtc clock source\n");
ret = PTR_ERR(rtc_clk); return PTR_ERR(info->rtc_clk);
rtc_clk = NULL;
return ret;
} }
clk_prepare_enable(info->rtc_clk);
clk_prepare_enable(rtc_clk);
/* check to see if everything is setup correctly */ /* check to see if everything is setup correctly */
s3c_rtc_enable(info, 1);
s3c_rtc_enable(pdev, 1);
dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", 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); device_init_wakeup(&pdev->dev, 1);
/* register RTC and exit */ /* register RTC and exit */
info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
THIS_MODULE); THIS_MODULE);
if (IS_ERR(info->rtc)) {
if (IS_ERR(rtc)) {
dev_err(&pdev->dev, "cannot attach rtc\n"); dev_err(&pdev->dev, "cannot attach rtc\n");
ret = PTR_ERR(rtc); ret = PTR_ERR(info->rtc);
goto err_nortc; 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;
}
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;
}
/* Check RTC Time */ /* Check RTC Time */
s3c_rtc_gettime(&pdev->dev, &rtc_tm);
s3c_rtc_gettime(NULL, &rtc_tm);
if (rtc_valid_tm(&rtc_tm)) { if (rtc_valid_tm(&rtc_tm)) {
rtc_tm.tm_year = 100; rtc_tm.tm_year = 100;
@ -523,111 +545,90 @@ static int s3c_rtc_probe(struct platform_device *pdev)
rtc_tm.tm_min = 0; rtc_tm.tm_min = 0;
rtc_tm.tm_sec = 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"); dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
} }
if (s3c_rtc_cpu_type != TYPE_S3C2410) if (info->cpu_type != TYPE_S3C2410)
rtc->max_user_freq = 32768; info->rtc->max_user_freq = 32768;
else else
rtc->max_user_freq = 128; info->rtc->max_user_freq = 128;
if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { if (info->cpu_type == TYPE_S3C2416 || info->cpu_type == TYPE_S3C2443) {
tmp = readw(s3c_rtc_base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
tmp |= S3C2443_RTCCON_TICSEL; tmp |= S3C2443_RTCCON_TICSEL;
writew(tmp, s3c_rtc_base + S3C2410_RTCCON); writew(tmp, info->base + S3C2410_RTCCON);
} }
platform_set_drvdata(pdev, rtc); s3c_rtc_setfreq(info, 1);
s3c_rtc_setfreq(&pdev->dev, 1); clk_disable(info->rtc_clk);
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);
return 0; return 0;
err_nortc: err_nortc:
s3c_rtc_enable(pdev, 0); s3c_rtc_enable(info, 0);
clk_disable_unprepare(rtc_clk); clk_disable_unprepare(info->rtc_clk);
return ret; return ret;
} }
#ifdef CONFIG_PM_SLEEP #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) 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(rtc_clk); clk_enable(info->rtc_clk);
/* save TICNT for anyone using periodic interrupts */ /* save TICNT for anyone using periodic interrupts */
if (s3c_rtc_cpu_type == TYPE_S3C64XX) { if (info->cpu_type == TYPE_S3C64XX) {
ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON); info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
ticnt_en_save &= S3C64XX_RTCCON_TICEN; info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
ticnt_save = readl(s3c_rtc_base + S3C2410_TICNT); info->ticnt_save = readl(info->base + S3C2410_TICNT);
} else { } else {
ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); info->ticnt_save = readb(info->base + S3C2410_TICNT);
} }
s3c_rtc_enable(pdev, 0); s3c_rtc_enable(info, 0);
if (device_may_wakeup(dev) && !wake_en) { if (device_may_wakeup(dev) && !info->wake_en) {
if (enable_irq_wake(s3c_rtc_alarmno) == 0) if (enable_irq_wake(info->irq_alarm) == 0)
wake_en = true; info->wake_en = true;
else else
dev_err(dev, "enable_irq_wake failed\n"); dev_err(dev, "enable_irq_wake failed\n");
} }
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
static int s3c_rtc_resume(struct device *dev) static int s3c_rtc_resume(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev); struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int tmp; unsigned int tmp;
clk_enable(rtc_clk); clk_enable(info->rtc_clk);
s3c_rtc_enable(pdev, 1); s3c_rtc_enable(info, 1);
if (s3c_rtc_cpu_type == TYPE_S3C64XX) { if (info->cpu_type == TYPE_S3C64XX) {
writel(ticnt_save, s3c_rtc_base + S3C2410_TICNT); writel(info->ticnt_save, info->base + S3C2410_TICNT);
if (ticnt_en_save) { if (info->ticnt_en_save) {
tmp = readw(s3c_rtc_base + S3C2410_RTCCON); tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp | ticnt_en_save, writew(tmp | info->ticnt_en_save,
s3c_rtc_base + S3C2410_RTCCON); info->base + S3C2410_RTCCON);
} }
} else { } else {
writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); writeb(info->ticnt_save, info->base + S3C2410_TICNT);
} }
if (device_may_wakeup(dev) && wake_en) { if (device_may_wakeup(dev) && info->wake_en) {
disable_irq_wake(s3c_rtc_alarmno); disable_irq_wake(info->irq_alarm);
wake_en = false; info->wake_en = false;
} }
clk_disable(rtc_clk); clk_disable(info->rtc_clk);
return 0; return 0;
} }
#endif #endif
static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume); static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
#ifdef CONFIG_OF #ifdef CONFIG_OF