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sparc64: fix wrong m48t59 RTC year

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Correctly calculate offset to the year register for
Mostek RTC.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krzysztof Helt 2008-09-07 18:12:59 -07:00 committed by David S. Miller
parent 1aa0365f27
commit 3baca76f56
1 changed files with 4 additions and 2 deletions
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6
arch/sparc64/kernel/time.c
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@ -500,6 +500,7 @@ 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;
@ -507,7 +508,7 @@ static unsigned char mostek_read_byte(struct device *dev, u32 ofs)
val = readb(regs + ofs);
/* the year 0 is 1968 */
if (ofs == M48T59_YEAR) {
if (ofs == pdata->offset + M48T59_YEAR) {
val += 0x68;
if ((val & 0xf) > 9)
val += 6;
@ -518,10 +519,11 @@ static unsigned char mostek_read_byte(struct device *dev, u32 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;
regs = (void __iomem *) pdev->resource[0].start;
if (ofs == M48T59_YEAR) {
if (ofs == pdata->offset + M48T59_YEAR) {
if (val < 0x68)
val += 0x32;
else