[PATCH v3 1/2] ARM: dts: Add mask-tpm-reset to the device tree
dianders at chromium.org
Tue Jul 15 09:19:12 PDT 2014
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.
Reviewed-by: Doug Anderson <dianders at chromium.org>
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