linux-kernel - Re: [PATCH v2 2/7] ARM: tegra: update device trees for USB binding rework

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Message-ID: <515C83FF.10004@wwwdotorg.org>
Date:	Wed, 03 Apr 2013 13:33:19 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Venu Byravarasu <vbyravarasu@...dia.com>
CC:	gregkh@...uxfoundation.org, balbi@...com,
	stern@...land.harvard.edu, linux-tegra@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] ARM: tegra: update device trees for USB binding
 rework

On 04/03/2013 02:41 AM, Venu Byravarasu wrote:
> This patch updates all Tegra board files so that they contain all the
> properties required by the updated USB DT binding. Note that this patch
> only adds the new properties and does not yet remove the old properties,
> in order to maintain bisectability. The old properties will be removed
> once the driver has been updated to assume the new bindings.

> diff --git a/arch/arm/boot/dts/tegra20-colibri-512.dtsi b/arch/arm/boot/dts/tegra20-colibri-512.dtsi
> index cb73e62..af5a7ae 100644
> --- a/arch/arm/boot/dts/tegra20-colibri-512.dtsi
> +++ b/arch/arm/boot/dts/tegra20-colibri-512.dtsi
> @@ -443,6 +443,10 @@
>  		nvidia,phy-reset-gpio = <&gpio 169 0>; /* gpio PV1 */

Another problem here: The code pulses this GPIO low to reset the PHY, so
in other words, the GPIO is active low.

Can you please prepare a separate patch to fix this; you need to change
all existing instances from:

nvidia,phy-reset-gpio = <&gpio 169 0>; /* gpio PV1 */

to:

nvidia,phy-reset-gpio = <&gpio 169 1>; /* gpio PV1, active low */

Insert that new patch before this patch in the series, and then fix this
patch so that any new copies of that property have the correct content
from the start.

Note: I pointed out this problem in my review of V1, but V2 didn't
include a fix for it:-(
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