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From: Kukjin Kim <kgene.kim@samsung.com>
To: Doug Anderson <dianders@chromium.org>
Cc: Vikas Sajjan <vikas.sajjan@samsung.com>,
	Vikas Sajjan <sajjan.linux@gmail.com>,
	Kukjin Kim <kgene.kim@samsung.com>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	sunil joshi <joshi@samsung.com>,
	linux-samsung-soc <linux-samsung-soc@vger.kernel.org>,
	Thomas P Abraham <thomas.ab@samsung.com>,
	Olof Johansson <olof@lixom.net>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3 1/2] ARM: dts: Add mask-tpm-reset to the device tree
Date: Wed, 16 Jul 2014 02:35:56 +0900	[thread overview]
Message-ID: <53C5667C.9070207@samsung.com> (raw)
In-Reply-To: <CAD=FV=XJD=Dt8z5Vmy2wXs4_FWqiW3=AhVw=sSZXFxv31+FHhA@mail.gmail.com>

On 07/16/14 01:19, Doug Anderson wrote:
> Vikas,
>
> On Tue, Jul 15, 2014 at 3:31 AM, Vikas Sajjan<vikas.sajjan@samsung.com>  wrote:
>> From: Doug Anderson<dianders@chromium.org>
>>
>> The mask-tpm-reset GPIO is used by the kernel to prevent the TPM from
>> being reset across sleep/wake.  If we don't set it to anything then
>> the TPM will be reset.  U-Boot will detect this as invalid
>> and will reset the system on resume time. This GPIO can always be low
>> and not hurt anything.  It will get pulled back high again during a
>> normal warm reset when it will default back to an input.
>>
>> To properly preserve the TPM state across suspend/resume and to make
>> the chrome U-Boot happy, properly set the GPIO to mask the
>> reset to the TPM.
>>
>> Signed-off-by: Doug Anderson<dianders@chromium.org>
>> Signed-off-by: Vikas Sajjan<vikas.sajjan@samsung.com>
>> ---
>>   arch/arm/boot/dts/exynos5420-peach-pit.dts |   12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>
> Looks good to me.  I'll assume Kukjin will add the words
> "exynos5420-peach-pit" into the patch description when applying.
>
Yes :)

> Reviewed-by: Doug Anderson<dianders@chromium.org>
>
I've applied this series, thanks.

- Kukjin

  reply	other threads:[~2014-07-15 17:36 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-15 10:31 [PATCH v3 0/2] Add mask-tpm-reset DT node to the exynos5 Vikas Sajjan
2014-07-15 10:31 ` [PATCH v3 1/2] ARM: dts: Add mask-tpm-reset to the device tree Vikas Sajjan
2014-07-15 16:19   ` Doug Anderson
2014-07-15 17:35     ` Kukjin Kim [this message]
2014-07-15 10:31 ` [PATCH v3 2/2] ARM: dts: Add mask-tpm-reset DT node to the exynos5800-peach-pi Vikas Sajjan
2014-07-15 16:19   ` Doug Anderson

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