From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 18 Jan 2021 03:57:06 +0000 (-0600)
Subject: mfd: iqs62x: Increase interrupt handler return delay
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a3a06ea17437814f47691282d9d6f6bcf62a8a9e;p=linux.git

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 7a1ff7c78801b..07c9725317156 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;
 }