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rtc-m48t59: shift zero year to 1968 on sparc (rev 2) 

Shift the first year to 1968 for Sun SPARC machines.

Move this logic from platform specific files to rtc driver
as this fixes problems with calculating a century bit.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Tested-by: Alexander Beregalov
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Krzysztof Helt 2008-10-29 15:35:24 -07:00 committed by David S. Miller
parent be37664934
commit 12a9ee3cce
3 changed files with 35 additions and 51 deletions
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23
arch/sparc/kernel/time.c
View File

@ -119,35 +119,16 @@ static unsigned char mostek_read_byte(struct device *dev, u32 ofs)
{
struct platform_device *pdev = to_platform_device(dev);
struct m48t59_plat_data *pdata = pdev->dev.platform_data;
void __iomem *regs = pdata->ioaddr;
unsigned char val = readb(regs + ofs);
/* the year 0 is 1968 */
if (ofs == pdata->offset + M48T59_YEAR) {
val += 0x68;
if ((val & 0xf) > 9)
val += 6;
}
return val;
return readb(pdata->ioaddr + ofs);
}
static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
{
struct platform_device *pdev = to_platform_device(dev);
struct m48t59_plat_data *pdata = pdev->dev.platform_data;
void __iomem *regs = pdata->ioaddr;
if (ofs == pdata->offset + M48T59_YEAR) {
if (val < 0x68)
val += 0x32;
else
val -= 0x68;
if ((val & 0xf) > 9)
val += 6;
if ((val & 0xf0) > 0x9A)
val += 0x60;
}
writeb(val, regs + ofs);
writeb(val, pdata->ioaddr + ofs);
}
static struct m48t59_plat_data m48t59_data = {

29
arch/sparc64/kernel/time.c
View File

@ -503,39 +503,16 @@ static struct of_platform_driver bq4802_driver = {
static unsigned char mostek_read_byte(struct device *dev, u32 ofs)
{
struct platform_device *pdev = to_platform_device(dev);
struct m48t59_plat_data *pdata = pdev->dev.platform_data;
void __iomem *regs;
unsigned char val;
void __iomem *regs = (void __iomem *) pdev->resource[0].start;
regs = (void __iomem *) pdev->resource[0].start;
val = readb(regs + ofs);
/* the year 0 is 1968 */
if (ofs == pdata->offset + M48T59_YEAR) {
val += 0x68;
if ((val & 0xf) > 9)
val += 6;
}
return val;
return readb(regs + ofs);
}
static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
{
struct platform_device *pdev = to_platform_device(dev);
struct m48t59_plat_data *pdata = pdev->dev.platform_data;
void __iomem *regs;
void __iomem *regs = (void __iomem *) pdev->resource[0].start;
regs = (void __iomem *) pdev->resource[0].start;
if (ofs == pdata->offset + M48T59_YEAR) {
if (val < 0x68)
val += 0x32;
else
val -= 0x68;
if ((val & 0xf) > 9)
val += 6;
if ((val & 0xf0) > 0x9A)
val += 0x60;
}
writeb(val, regs + ofs);
}

34
drivers/rtc/rtc-m48t59.c
View File

@ -87,6 +87,10 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
dev_dbg(dev, "Century bit is enabled\n");
tm->tm_year += 100; /* one century */
}
#ifdef CONFIG_SPARC
/* Sun SPARC machines count years since 1968 */
tm->tm_year += 68;
#endif
tm->tm_wday = bcd2bin(val & 0x07);
tm->tm_hour = bcd2bin(M48T59_READ(M48T59_HOUR) & 0x3F);
@ -110,11 +114,20 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
struct m48t59_private *m48t59 = platform_get_drvdata(pdev);
unsigned long flags;
u8 val = 0;
int year = tm->tm_year;
#ifdef CONFIG_SPARC
/* Sun SPARC machines count years since 1968 */
year -= 68;
#endif
dev_dbg(dev, "RTC set time %04d-%02d-%02d %02d/%02d/%02d\n",
tm->tm_year + 1900, tm->tm_mon, tm->tm_mday,
year + 1900, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
if (year < 0)
return -EINVAL;
spin_lock_irqsave(&m48t59->lock, flags);
/* Issue the WRITE command */
M48T59_SET_BITS(M48T59_CNTL_WRITE, M48T59_CNTL);
@ -125,9 +138,9 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
M48T59_WRITE((bin2bcd(tm->tm_mday) & 0x3F), M48T59_MDAY);
/* tm_mon is 0-11 */
M48T59_WRITE((bin2bcd(tm->tm_mon + 1) & 0x1F), M48T59_MONTH);
M48T59_WRITE(bin2bcd(tm->tm_year % 100), M48T59_YEAR);
M48T59_WRITE(bin2bcd(year % 100), M48T59_YEAR);
if (pdata->type == M48T59RTC_TYPE_M48T59 && (tm->tm_year / 100))
if (pdata->type == M48T59RTC_TYPE_M48T59 && (year / 100))
val = (M48T59_WDAY_CEB | M48T59_WDAY_CB);
val |= (bin2bcd(tm->tm_wday) & 0x07);
M48T59_WRITE(val, M48T59_WDAY);
@ -159,6 +172,10 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
#ifdef CONFIG_SPARC
/* Sun SPARC machines count years since 1968 */
tm->tm_year += 68;
#endif
/* tm_mon is 0-11 */
tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
@ -192,11 +209,20 @@ static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
struct rtc_time *tm = &alrm->time;
u8 mday, hour, min, sec;
unsigned long flags;
int year = tm->tm_year;
#ifdef CONFIG_SPARC
/* Sun SPARC machines count years since 1968 */
year -= 68;
#endif
/* If no irq, we don't support ALARM */
if (m48t59->irq == NO_IRQ)
return -EIO;
if (year < 0)
return -EINVAL;
/*
* 0xff means "always match"
*/
@ -228,7 +254,7 @@ static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
spin_unlock_irqrestore(&m48t59->lock, flags);
dev_dbg(dev, "RTC set alarm time %04d-%02d-%02d %02d/%02d/%02d\n",
tm->tm_year + 1900, tm->tm_mon, tm->tm_mday,
year + 1900, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
return 0;
}