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Commit 9a654518 authored by Ben Dooks's avatar Ben Dooks Committed by Linus Torvalds
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[PATCH] drivers/rtc: fix rtc-s3c.c 

In the cleanups of drivers/rtc/s3c-rtc.c, the base address for the
registers got broken.  This patch fixes that by ensuring the readb/writeb
are all prefixed with the base returned from ioremap()ing the registers.

Also fix check for valid year range, which was the wrong way around.
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 66a377c5
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Showing with 68 additions and 55 deletions
drivers/rtc/rtc-s3c.c
View file @ 9a654518
......@@ -69,12 +69,12 @@ static void s3c_rtc_setaie(int to)
pr_debug("%s: aie=%d\n", __FUNCTION__, to);
tmp = readb(S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
if (to)
tmp |= S3C2410_RTCALM_ALMEN;
writeb(tmp, S3C2410_RTCALM);
writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
}
static void s3c_rtc_setpie(int to)
......@@ -84,12 +84,12 @@ static void s3c_rtc_setpie(int to)
pr_debug("%s: pie=%d\n", __FUNCTION__, to);
spin_lock_irq(&s3c_rtc_pie_lock);
tmp = readb(S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
tmp = readb(s3c_rtc_base + S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
if (to)
tmp |= S3C2410_TICNT_ENABLE;
writeb(tmp, S3C2410_TICNT);
writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
spin_unlock_irq(&s3c_rtc_pie_lock);
}
......@@ -98,13 +98,13 @@ static void s3c_rtc_setfreq(int freq)
unsigned int tmp;
spin_lock_irq(&s3c_rtc_pie_lock);
tmp = readb(S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
tmp = readb(s3c_rtc_base + S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
s3c_rtc_freq = freq;
tmp |= (128 / freq)-1;
writeb(tmp, S3C2410_TICNT);
writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
spin_unlock_irq(&s3c_rtc_pie_lock);
}
......@@ -113,14 +113,15 @@ static void s3c_rtc_setfreq(int freq)
static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
{
unsigned int have_retried = 0;
void __iomem *base = s3c_rtc_base;
retry_get_time:
rtc_tm->tm_min = readb(S3C2410_RTCMIN);
rtc_tm->tm_hour = readb(S3C2410_RTCHOUR);
rtc_tm->tm_mday = readb(S3C2410_RTCDATE);
rtc_tm->tm_mon = readb(S3C2410_RTCMON);
rtc_tm->tm_year = readb(S3C2410_RTCYEAR);
rtc_tm->tm_sec = readb(S3C2410_RTCSEC);
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);
/* the only way to work out wether the system was mid-update
* when we read it is to check the second counter, and if it
......@@ -151,17 +152,25 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
{
void __iomem *base = s3c_rtc_base;
/* the rtc gets round the y2k problem by just not supporting it */
if (tm->tm_year < 100)
if (tm->tm_year > 100) {
dev_err(dev, "rtc only supports 100 years\n");
return -EINVAL;
}
pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
tm->tm_year, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
writeb(BIN2BCD(tm->tm_sec), S3C2410_RTCSEC);
writeb(BIN2BCD(tm->tm_min), S3C2410_RTCMIN);
writeb(BIN2BCD(tm->tm_hour), S3C2410_RTCHOUR);
writeb(BIN2BCD(tm->tm_mday), S3C2410_RTCDATE);
writeb(BIN2BCD(tm->tm_mon + 1), S3C2410_RTCMON);
writeb(BIN2BCD(tm->tm_year - 100), S3C2410_RTCYEAR);
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(tm->tm_year - 100), base + S3C2410_RTCYEAR);
return 0;
}
......@@ -169,16 +178,17 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rtc_time *alm_tm = &alrm->time;
void __iomem *base = s3c_rtc_base;
unsigned int alm_en;
alm_tm->tm_sec = readb(S3C2410_ALMSEC);
alm_tm->tm_min = readb(S3C2410_ALMMIN);
alm_tm->tm_hour = readb(S3C2410_ALMHOUR);
alm_tm->tm_mon = readb(S3C2410_ALMMON);
alm_tm->tm_mday = readb(S3C2410_ALMDATE);
alm_tm->tm_year = readb(S3C2410_ALMYEAR);
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);
alm_en = readb(S3C2410_RTCALM);
alm_en = readb(base + S3C2410_RTCALM);
pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
alm_en,
......@@ -226,6 +236,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rtc_time *tm = &alrm->time;
void __iomem *base = s3c_rtc_base;
unsigned int alrm_en;
pr_debug("s3c_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
......@@ -234,32 +245,32 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
alrm_en = readb(S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
writeb(0x00, S3C2410_RTCALM);
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), 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), 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), S3C2410_ALMHOUR);
writeb(BIN2BCD(tm->tm_hour), base + S3C2410_ALMHOUR);
}
pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
writeb(alrm_en, S3C2410_RTCALM);
writeb(alrm_en, base + S3C2410_RTCALM);
if (0) {
alrm_en = readb(S3C2410_RTCALM);
alrm_en = readb(base + S3C2410_RTCALM);
alrm_en &= ~S3C2410_RTCALM_ALMEN;
writeb(alrm_en, S3C2410_RTCALM);
writeb(alrm_en, base + S3C2410_RTCALM);
disable_irq_wake(s3c_rtc_alarmno);
}
......@@ -319,8 +330,8 @@ static int s3c_rtc_ioctl(struct device *dev,
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
unsigned int rtcalm = readb(S3C2410_RTCALM);
unsigned int ticnt = readb (S3C2410_TICNT);
unsigned int rtcalm = readb(s3c_rtc_base + S3C2410_RTCALM);
unsigned int ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
seq_printf(seq, "alarm_IRQ\t: %s\n",
(rtcalm & S3C2410_RTCALM_ALMEN) ? "yes" : "no" );
......@@ -387,39 +398,40 @@ static struct rtc_class_ops s3c_rtcops = {
static void s3c_rtc_enable(struct platform_device *pdev, int en)
{
void __iomem *base = s3c_rtc_base;
unsigned int tmp;
if (s3c_rtc_base == NULL)
return;
if (!en) {
tmp = readb(S3C2410_RTCCON);
writeb(tmp & ~S3C2410_RTCCON_RTCEN, S3C2410_RTCCON);
tmp = readb(base + S3C2410_RTCCON);
writeb(tmp & ~S3C2410_RTCCON_RTCEN, base + S3C2410_RTCCON);
tmp = readb(S3C2410_TICNT);
writeb(tmp & ~S3C2410_TICNT_ENABLE, S3C2410_TICNT);
tmp = readb(base + S3C2410_TICNT);
writeb(tmp & ~S3C2410_TICNT_ENABLE, base + S3C2410_TICNT);
} else {
/* re-enable the device, and check it is ok */
if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){
if ((readb(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){
dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
tmp = readb(S3C2410_RTCCON);
writeb(tmp | S3C2410_RTCCON_RTCEN , S3C2410_RTCCON);
tmp = readb(base + S3C2410_RTCCON);
writeb(tmp|S3C2410_RTCCON_RTCEN, base+S3C2410_RTCCON);
}
if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){
if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){
dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
tmp = readb(S3C2410_RTCCON);
writeb(tmp& ~S3C2410_RTCCON_CNTSEL , S3C2410_RTCCON);
tmp = readb(base + S3C2410_RTCCON);
writeb(tmp& ~S3C2410_RTCCON_CNTSEL, base+S3C2410_RTCCON);
}
if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){
if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){
dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
tmp = readb(S3C2410_RTCCON);
writeb(tmp & ~S3C2410_RTCCON_CLKRST, S3C2410_RTCCON);
tmp = readb(base + S3C2410_RTCCON);
writeb(tmp & ~S3C2410_RTCCON_CLKRST, base+S3C2410_RTCCON);
}
}
}
......@@ -475,8 +487,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
}
s3c_rtc_mem = request_mem_region(res->start,
res->end-res->start+1,
pdev->name);
res->end-res->start+1,
pdev->name);
if (s3c_rtc_mem == NULL) {
dev_err(&pdev->dev, "failed to reserve memory region\n");
......@@ -495,7 +507,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
s3c_rtc_enable(pdev, 1);
pr_debug("s3c2410_rtc: RTCCON=%02x\n", readb(S3C2410_RTCCON));
pr_debug("s3c2410_rtc: RTCCON=%02x\n",
readb(s3c_rtc_base + S3C2410_RTCCON));
s3c_rtc_setfreq(s3c_rtc_freq);
......@@ -543,7 +556,7 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
/* save TICNT for anyone using periodic interrupts */
ticnt_save = readb(S3C2410_TICNT);
ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
/* calculate time delta for suspend */
......@@ -567,7 +580,7 @@ static int s3c_rtc_resume(struct platform_device *pdev)
rtc_tm_to_time(&tm, &time.tv_sec);
restore_time_delta(&s3c_rtc_delta, &time);
writeb(ticnt_save, S3C2410_TICNT);
writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
return 0;
}
#else
......
include/asm-arm/arch-s3c2410/regs-rtc.h
View file @ 9a654518
......@@ -18,7 +18,7 @@
#ifndef __ASM_ARCH_REGS_RTC_H
#define __ASM_ARCH_REGS_RTC_H __FILE__
#define S3C2410_RTCREG(x) ((x) + S3C24XX_VA_RTC)
#define S3C2410_RTCREG(x) (x)
#define S3C2410_RTCCON S3C2410_RTCREG(0x40)
#define S3C2410_RTCCON_RTCEN (1<<0)
......
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