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rtc: m48t59: Use platform_data struct for year offset value

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Instead of hard-coded values and ifdefs, store the year offset in the
platform_data struct.

Tested-by: Daniel Palmer <daniel@0x0f.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/665c3526184a8d0c4a6373297d8e7d9a12591d8b.1731450735.git.fthain@linux-m68k.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Finn Thain 2024-11-13 09:32:15 +11:00 committed by Alexandre Belloni
parent fb1283bfa2
commit a06e4a9306
4 changed files with 9 additions and 22 deletions
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1
arch/sparc/kernel/time_32.c
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@ -255,6 +255,7 @@ static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
static struct m48t59_plat_data m48t59_data = {
.read_byte = mostek_read_byte,
.write_byte = mostek_write_byte,
.yy_offset = 68,
};
/* resource is set at runtime */

1
arch/sparc/kernel/time_64.c
View File

@ -544,6 +544,7 @@ static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
static struct m48t59_plat_data m48t59_data = {
.read_byte = mostek_read_byte,
.write_byte = mostek_write_byte,
.yy_offset = 68,
};
static struct platform_device m48t59_rtc = {

26
drivers/rtc/rtc-m48t59.c
View File

@ -71,7 +71,7 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
/* Issue the READ command */
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR)) + pdata->yy_offset;
/* tm_mon is 0-11 */
tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
tm->tm_mday = bcd2bin(M48T59_READ(M48T59_MDAY));
@ -82,10 +82,6 @@ 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);
@ -106,12 +102,7 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
struct m48t59_private *m48t59 = dev_get_drvdata(dev);
unsigned long flags;
u8 val = 0;
int year = tm->tm_year;
#ifdef CONFIG_SPARC
/* Sun SPARC machines count years since 1968 */
year -= 68;
#endif
int year = tm->tm_year - pdata->yy_offset;
dev_dbg(dev, "RTC set time %04d-%02d-%02d %02d/%02d/%02d\n",
year + 1900, tm->tm_mon, tm->tm_mday,
@ -162,11 +153,7 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
/* Issue the READ command */
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->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR)) + pdata->yy_offset;
/* tm_mon is 0-11 */
tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
@ -197,12 +184,7 @@ 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
int year = tm->tm_year - pdata->yy_offset;
/* If no irq, we don't support ALARM */
if (m48t59->irq == NO_IRQ)

3
include/linux/rtc/m48t59.h
View File

@ -56,6 +56,9 @@ struct m48t59_plat_data {
void __iomem *ioaddr;
/* offset to RTC registers, automatically set according to the type */
unsigned int offset;
/* YY digits (in RTC) are offset, i.e. year is 1900 + yy_offset + YY */
int yy_offset;
};
#endif /* _LINUX_RTC_M48T59_H_ */