From f61ae6711d69717558e882a78487527705603a74 Mon Sep 17 00:00:00 2001 From: Changhwan Youn Date: Wed, 27 Oct 2010 15:33:06 -0700 Subject: [PATCH] rtc: rtc-s3c: fix access unit from byte to word on RTCCON S3C2410_RTCCON of TYPE_S3C64XX RTC should be read/written by readw and writew, because TYPE_S3C64XX RTC uses bit 8 and 9. And TYPE_S3C2410 RTC also can access it by readw and writew. [atul.dahiya@samsung.com: tested on smdk2416] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Changhwan Youn Signed-off-by: Kukjin Kim Tested-by: Atul Dahiya Cc: Ben Dooks Cc: Wan ZongShun Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/rtc-s3c.c | 39 +++++++++++++++++++++------------------ 1 file changed, 21 insertions(+), 18 deletions(-) diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index f57a87f..a87982d 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -100,7 +100,7 @@ static int s3c_rtc_setpie(struct device *dev, int enabled) spin_lock_irq(&s3c_rtc_pie_lock); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - tmp = readb(s3c_rtc_base + S3C2410_RTCCON); + tmp = readw(s3c_rtc_base + S3C2410_RTCCON); tmp &= ~S3C64XX_RTCCON_TICEN; if (enabled) @@ -318,7 +318,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) unsigned int ticnt; if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - ticnt = readb(s3c_rtc_base + S3C2410_RTCCON); + ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt &= S3C64XX_RTCCON_TICEN; } else { ticnt = readb(s3c_rtc_base + S3C2410_TICNT); @@ -391,11 +391,11 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) return; if (!en) { - tmp = readb(base + S3C2410_RTCCON); + tmp = readw(base + S3C2410_RTCCON); if (s3c_rtc_cpu_type == TYPE_S3C64XX) tmp &= ~S3C64XX_RTCCON_TICEN; tmp &= ~S3C2410_RTCCON_RTCEN; - writeb(tmp, base + S3C2410_RTCCON); + writew(tmp, base + S3C2410_RTCCON); if (s3c_rtc_cpu_type == TYPE_S3C2410) { tmp = readb(base + S3C2410_TICNT); @@ -405,25 +405,28 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) } else { /* re-enable the device, and check it is ok */ - if ((readb(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){ + if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) { dev_info(&pdev->dev, "rtc disabled, re-enabling\n"); - tmp = readb(base + S3C2410_RTCCON); - writeb(tmp|S3C2410_RTCCON_RTCEN, base+S3C2410_RTCCON); + tmp = readw(base + S3C2410_RTCCON); + writew(tmp | S3C2410_RTCCON_RTCEN, + base + S3C2410_RTCCON); } - if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){ + if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) { dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n"); - tmp = readb(base + S3C2410_RTCCON); - writeb(tmp& ~S3C2410_RTCCON_CNTSEL, base+S3C2410_RTCCON); + tmp = readw(base + S3C2410_RTCCON); + writew(tmp & ~S3C2410_RTCCON_CNTSEL, + base + S3C2410_RTCCON); } - if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){ + if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) { dev_info(&pdev->dev, "removing RTCCON_CLKRST\n"); - tmp = readb(base + S3C2410_RTCCON); - writeb(tmp & ~S3C2410_RTCCON_CLKRST, base+S3C2410_RTCCON); + tmp = readw(base + S3C2410_RTCCON); + writew(tmp & ~S3C2410_RTCCON_CLKRST, + base + S3C2410_RTCCON); } } } @@ -514,8 +517,8 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) s3c_rtc_enable(pdev, 1); - pr_debug("s3c2410_rtc: RTCCON=%02x\n", - readb(s3c_rtc_base + S3C2410_RTCCON)); + pr_debug("s3c2410_rtc: RTCCON=%02x\n", + readw(s3c_rtc_base + S3C2410_RTCCON)); device_init_wakeup(&pdev->dev, 1); @@ -578,7 +581,7 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) /* save TICNT for anyone using periodic interrupts */ ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - ticnt_en_save = readb(s3c_rtc_base + S3C2410_RTCCON); + ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt_en_save &= S3C64XX_RTCCON_TICEN; } s3c_rtc_enable(pdev, 0); @@ -596,8 +599,8 @@ static int s3c_rtc_resume(struct platform_device *pdev) s3c_rtc_enable(pdev, 1); writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) { - tmp = readb(s3c_rtc_base + S3C2410_RTCCON); - writeb(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); + tmp = readw(s3c_rtc_base + S3C2410_RTCCON); + writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); } if (device_may_wakeup(&pdev->dev)) -- 2.7.4