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[ARM] mmp2: add handling on PMIC IRQ

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Since PMIC INT pin is a special pin of CPU, the status of PMIC INT pin needs
to be cleared after PMIC IRQ occured. Now append the clear operation in
irq chip handler.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Haojian Zhuang 2010-02-03 10:01:18 -05:00 committed by Eric Miao
parent ce0ac42359
commit df0c382436
3 changed files with 22 additions and 1 deletions
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1
arch/arm/mach-mmp/common.h
View file

@ -3,6 +3,7 @@
struct sys_timer;
extern void timer_init(int irq);
extern void mmp2_clear_pmic_int(void);
extern struct sys_timer pxa168_timer;
extern struct sys_timer pxa910_timer;

12
arch/arm/mach-mmp/irq-mmp2.c
View file

@ -42,6 +42,12 @@ static struct irq_chip icu_irq_chip = {
.unmask = icu_unmask_irq,
};
static void pmic_irq_ack(unsigned int irq)
{
if (irq == IRQ_MMP2_PMIC)
mmp2_clear_pmic_int();
}
#define SECOND_IRQ_MASK(_name_, irq_base, prefix) \
static void _name_##_mask_irq(unsigned int irq) \
{ \
@ -82,7 +88,6 @@ SECOND_IRQ_DEMUX(_name_, irq_base, prefix) \
static struct irq_chip _name_##_irq_chip = { \
.name = #_name_, \
.mask = _name_##_mask_irq, \
.mask_ack = _name_##_mask_irq, \
.unmask = _name_##_unmask_irq, \
}
@ -126,6 +131,11 @@ void __init mmp2_init_icu(void)
}
}
/* NOTE: IRQ_MMP2_PMIC requires the PMIC MFPR register
* to be written to clear the interrupt
*/
pmic_irq_chip.ack = pmic_irq_ack;
init_mux_irq(&pmic_irq_chip, IRQ_MMP2_PMIC_BASE, 2);
init_mux_irq(&rtc_irq_chip, IRQ_MMP2_RTC_BASE, 2);
init_mux_irq(&twsi_irq_chip, IRQ_MMP2_TWSI_BASE, 5);

10
arch/arm/mach-mmp/mmp2.c
View file

@ -37,6 +37,16 @@ static struct mfp_addr_map mmp2_addr_map[] __initdata = {
MFP_ADDR_END,
};
void mmp2_clear_pmic_int(void)
{
unsigned long mfpr_pmic, data;
mfpr_pmic = APB_VIRT_BASE + 0x1e000 + 0x2c4;
data = __raw_readl(mfpr_pmic);
__raw_writel(data | (1 << 6), mfpr_pmic);
__raw_writel(data, mfpr_pmic);
}
static void __init mmp2_init_gpio(void)
{
int i;