Re: [PATCH] pinctrl: as3722: fix handling of GPIO invert bit

From: Stephen Warren
Date: Wed Apr 16 2014 - 12:21:21 EST


On 04/15/2014 07:25 PM, Andrew Bresticker wrote:
> The AS3722_GPIO_INV bit will always be blindly overwritten by
> as3722_pinctrl_gpio_set_direction() and will be ignored when
> setting the value of the GPIO in as3722_gpio_set() since the
> enable_gpio_invert flag is never set. This will cause an
> initially inverted GPIO to toggle when requested as an output,
> which could be problematic if, for example, the GPIO controls
> a critical regulator.
>
> Instead of setting up the enable_gpio_invert flag, uust leave
> the invert bit alone and check it before setting the GPIO value.

Reviewed-by: Stephen Warren <swarren@xxxxxxxxxx>
Tested-by: Stephen Warren <swarren@xxxxxxxxxx>

(not with a 'scope or anything, but an affected system boots in a stable
fashion with this applied)

Should this be CC: stable?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/