Commit 12a9ee3c authored by Krzysztof Helt's avatar Krzysztof Helt Committed by David S. Miller
Browse files

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: default avatarKrzysztof Helt <krzysztof.h1@wp.pl>
Tested-by: Alexander Beregalov
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent be376649

arch/sparc/kernel/time.c

+4 −23
Original line number Diff line number Diff line
@@ -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 = {

arch/sparc64/kernel/time.c

+5 −28
Original line number Diff line number Diff line
@@ -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;



	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;

	}

	void __iomem *regs = (void __iomem *) pdev->resource[0].start;



	writeb(val, regs + ofs);

}

drivers/rtc/rtc-m48t59.c

+30 −4
Original line number Diff line number Diff line
@@ -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;

}