Re: [PATCH v1 1/2] gpio: gpio-wcove: fix GPIO irq status mask

From: sathyanarayanan kuppuswamy
Date: Thu Apr 20 2017 - 20:56:03 EST


Hi Andy,

Thanks for the review.


On 04/19/2017 01:41 PM, Andy Shevchenko wrote:
On Fri, Apr 14, 2017 at 8:29 PM,
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>

According to Whiskey cove PMIC spec, bit 7 of GPIOIRQ0_REG belongs to
cove -> Cove
Will fix it in next version.

battery IO. So we should skip this bit when checking for GPIO irq pending
irq -> IRQ
Ditto.

status. Otherwise, wcove_gpio_irq_handler() might go into the infinite
loop until irq "pending" status becomes 0. This patch fixes this issue.
Ditto.

+#define GPIO_IRQ0_MASK 0x7f
+#define GPIO_IRQ1_MASK 0x3f
GENMASK()
Ditto.

- pending = p[0] | (p[1] << 8);
+ pending = (p[0] & GPIO_IRQ0_MASK) |
+ ((p[1] & GPIO_IRQ1_MASK) << 7);
I would leave this on one line despite 80 characters limit (actually
how long is it?).
It comes to 84 characters. Should I leave it as it is ?


--
Sathyanarayanan Kuppuswamy
Android kernel developer