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Subject[PATCH 4/6] mfd: iqs62x: Increase interrupt handler return delay
Date
The time the device takes to deassert its RDY output following an
I2C stop condition scales with the core clock frequency.

To prevent level-triggered interrupts from being reasserted after
the interrupt handler returns, increase the time before returning
to account for the worst-case delay (~90 us) plus margin.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
---
drivers/mfd/iqs62x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/iqs62x.c b/drivers/mfd/iqs62x.c
index 7a1ff7c..07c9725 100644
--- a/drivers/mfd/iqs62x.c
+++ b/drivers/mfd/iqs62x.c
@@ -533,7 +533,7 @@ static irqreturn_t iqs62x_irq(int irq, void *context)
* ensure the device's RDY output has been deasserted by the time the
* interrupt handler returns.
*/
- usleep_range(50, 100);
+ usleep_range(150, 200);

return IRQ_HANDLED;
}
--
2.7.4
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