linux-kernel - Re: [PATCH 0/3] ARM: dt: tegra: cardhu: add entry for regulators

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Date:	Thu, 9 Aug 2012 16:29:08 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	"olof@...om.net" <olof@...om.net>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 0/3] ARM: dt: tegra: cardhu: add entry for regulators

On Wednesday 08 August 2012 10:58 PM, Stephen Warren wrote:
> On 08/08/2012 12:48 AM, Laxman Dewangan wrote:
>> This patch series add the PMIC and fixed regulators for
>> cardhu board. There is multiple versions of cardhu baord named
>> as A01, A02, A03..and so on. Cardhu A01 and A03 are not supported.
>> Cardhu A02 and A04 have different sets of GPIO for regualtors.
>> The cardhu A04 is compatible for A05, A06 and A07 in GPIOs.
>> This patch series split the cardhu dts file to cardhu-a02 and
>> carchu-a04 and then add entry for different fixed regualtors.
> Two more comments on this patch, sorry for the noise...
>
> 1) With this patch, running "reboot" or "shutdown -r now" no longer
> works; the system hangs. Reboot works fine without this patch, in
> next-20120708.

I tested reboot and it worked fine with me on my patch v2 series.

> 2) U-Boot initializes the LCD, and prints to it. This is left running
> when the kernel is booted, and the kernel doesn't reprogram the HW, so
> the LCD continues to scan out some "random" area of memory. Typically,
> this then gets used and so the LCD shows random patterns. In today's
> linux-next it seems to be turned black though; not sure why that's
> happening. Either way, this patch turns the whole LCD completely white.
> Is that an expected change?

The panel power was not ON and hence the white screen. Fixed it in patch 
V2 to make always ON with boot-on.

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