linux-kernel - Re: [PATCH v2 1/1] gpio: twl4030: Fix regression for twl gpio LED output

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Date:	Tue, 10 Dec 2013 13:16:38 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Roger Quadros <rogerq@...com>
Cc:	ext Tony Lindgren <tony@...mide.com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Nishanth Menon <nm@...com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Felipe Balbi <balbi@...com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-OMAP <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/1] gpio: twl4030: Fix regression for twl gpio LED output

On Thu, Dec 5, 2013 at 10:23 AM, Roger Quadros <rogerq@...com> wrote:

> Commit 0b2aa8be introduced a regression that causes failure
> in setting LED GPO direction to OUT.
>
> This causes USB host probe failures for Beagleboard C4.
>
> [    2.075469] platform usb_phy_gen_xceiv.2: Driver usb_phy_gen_xceiv requests probe deferral
> [    2.090454] hsusb2_vcc: Failed to request enable GPIO510: -22
> [    2.100982] reg-fixed-voltage reg-fixed-voltage.0.auto: Failed to register regulator: -22
> [    2.109954] reg-fixed-voltage: probe of reg-fixed-voltage.0.auto failed with error -22
>
> direction_out/direction_in must return 0 if the operation succeeded.
>
> Also, don't update direction flag and output data if twl4030_set_gpio_direction()
> failed inside twl_direction_out();
>
> Signed-off-by: Roger Quadros <rogerq@...com>

Patch applied for fixes with Tony's ACK.

Thanks!
Linus Walleij
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