[PATCH v3 1/2] ARM: dts: Add mask-tpm-reset to the device tree

Kukjin Kim kgene.kim at samsung.com
Tue Jul 15 10:35:56 PDT 2014

On 07/16/14 01:19, Doug Anderson wrote:
> Vikas,
> On Tue, Jul 15, 2014 at 3:31 AM, Vikas Sajjan<vikas.sajjan at samsung.com>  wrote:
>> From: Doug Anderson<dianders at 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 at chromium.org>
>> Signed-off-by: Vikas Sajjan<vikas.sajjan at 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 at chromium.org>
I've applied this series, thanks.

- Kukjin

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