mfd: iqs62x: Increase interrupt handler return delay

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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/iqs62x.c b/drivers/mfd/iqs62x.c
index 7a1ff7c78801b2f5466a8b9ed7fbe61dddf52ce1..07c97253171566e94d28054b207383868eb82333 100644 (file)
--- 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;
 }