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ARM: 5787/1: U300 COH 901 331 fixes

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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>
This commit is contained in:
Linus Walleij 2009-11-14 01:03:24 +01:00 committed by Russell King
parent 927585f650
commit 378ce74bee
2 changed files with 12 additions and 1 deletions
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2
arch/arm/mach-u300/core.c
View File

@ -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,

11
drivers/rtc/rtc-coh901331.c
View File

@ -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 = {