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

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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>
This commit is contained in:
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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29
arch/sparc64/kernel/time.c
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@@ -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);
}