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| author | Linus Walleij <linus.walleij@stericsson.com> | 2009-11-14 01:03:24 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-11-16 16:15:49 +0000 |
| commit | 378ce74bee4cb0183489bc0f850790a2264ca975 (patch) | |
| tree | d1999328c0a7ebabf49b0f25909779fa9e7e5966 | |
| parent | 927585f650b51639f0262dad650eafeaf1611197 (diff) | |
| download | kernel_samsung_tuna-378ce74bee4cb0183489bc0f850790a2264ca975.zip kernel_samsung_tuna-378ce74bee4cb0183489bc0f850790a2264ca975.tar.gz kernel_samsung_tuna-378ce74bee4cb0183489bc0f850790a2264ca975.tar.bz2 | |
ARM: 5787/1: U300 COH 901 331 fixes
This will fix some small issues with the COH 901 331 RTC driver:
- Interrupt is disabled after alarm so that we don't fire
multiple interrupts.
- We return 0 from the coh901331_alarm_irq_enable() ridding
a compile warning.
- We alter the name in the U300 device registry to match that
of the driver so they sucessfully resolve.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-u300/core.c | 2 | ||||
| -rw-r--r-- | drivers/rtc/rtc-coh901331.c | 11 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index be60d6d..653e25b 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -408,7 +408,7 @@ static struct platform_device keypad_device = { }; static struct platform_device rtc_device = { - .name = "rtc0", + .name = "rtc-coh901331", .id = -1, .num_resources = ARRAY_SIZE(rtc_resources), .resource = rtc_resources, diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c index 7fe1fa2..03ea530 100644 --- a/drivers/rtc/rtc-coh901331.c +++ b/drivers/rtc/rtc-coh901331.c @@ -58,7 +58,16 @@ static irqreturn_t coh901331_interrupt(int irq, void *data) clk_enable(rtap->clk); /* Ack IRQ */ writel(1, rtap->virtbase + COH901331_IRQ_EVENT); + /* + * Disable the interrupt. This is necessary because + * the RTC lives on a lower-clocked line and will + * not release the IRQ line until after a few (slower) + * clock cycles. The interrupt will be re-enabled when + * a new alarm is set anyway. + */ + writel(0, rtap->virtbase + COH901331_IRQ_MASK); clk_disable(rtap->clk); + /* Set alarm flag */ rtc_update_irq(rtap->rtc, 1, RTC_AF); @@ -128,6 +137,8 @@ static int coh901331_alarm_irq_enable(struct device *dev, unsigned int enabled) else writel(0, rtap->virtbase + COH901331_IRQ_MASK); clk_disable(rtap->clk); + + return 0; } static struct rtc_class_ops coh901331_ops = { |