diff options
| 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 17:15:49 +0100 |
| commit | 378ce74bee4cb0183489bc0f850790a2264ca975 (patch) | |
| tree | d1999328c0a7ebabf49b0f25909779fa9e7e5966 /drivers/rtc | |
| parent | ARM: Fix warning in sa1100-flash.c (diff) | |
| download | linux-378ce74bee4cb0183489bc0f850790a2264ca975.tar.xz linux-378ce74bee4cb0183489bc0f850790a2264ca975.zip | |
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>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-coh901331.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c index 7fe1fa26c52c..03ea530981d1 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 = { |