While handling PRCM IRQs, mask out interrupts that are not enabled in
PRM_IRQENABLE_MPU. If these are not masked out, non-enabled
interrupts are caught, a WARN() is printed due to no 'handler' and the
events are cleared. In addition to being noisy, this can also
interfere with independent polling of this register by SR/VP code.
This was noticed using SmartReflex transitions which cause the VPx_*
interrupts to be handled since they are set in PRM_IRQSTATUS_MPU even
but not enabled in PRM_IRQENABLE_MPU.
Acked-by: Mike Turquette <mturquette@xxxxxx>
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/pm34xx.c | 17 ++++++++++++-----
1 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index ea0000b..a15aa92 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -267,13 +267,16 @@ static int _prcm_int_handle_wakeup(void)
*/
static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
{
- u32 irqstatus_mpu;
+ u32 irqenable_mpu, irqstatus_mpu;
int c = 0;
- do {
- irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
- OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+ irqenable_mpu = prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+ irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+ irqstatus_mpu &= irqenable_mpu;
+ do {
if (irqstatus_mpu & (OMAP3430_WKUP_ST | OMAP3430_IO_ST)) {
c = _prcm_int_handle_wakeup();
@@ -292,7 +295,11 @@ static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
- } while (prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET));
+ irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+ irqstatus_mpu &= irqenable_mpu;
+
+ } while (irqstatus_mpu);
return IRQ_HANDLED;
}
--
1.7.0.2
--
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