mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

ARM: dts: Add mask-tpm-reset node in exynos5800-peach-pi 

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: Vikas Sajjan <vikas.sajjan@samsung.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Vikas Sajjan 2014-07-16 02:38:44 +09:00 committed by Kukjin Kim
parent ac5ce09e14
commit 73a9bb2e7a
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/arm/boot/dts/exynos5800-peach-pi.dts
View File

@ -209,6 +209,9 @@
&pinctrl_0 {
pinctrl-names = "default";
pinctrl-0 = <&mask_tpm_reset>;
max98091_irq: max98091-irq {
samsung,pins = "gpx0-2";
samsung,pin-function = <0>;
@ -216,6 +219,15 @@
samsung,pin-drv = <0>;
};
/* We need GPX0_6 to be low at sleep time; just keep it low always */
mask_tpm_reset: mask-tpm-reset {
samsung,pins = "gpx0-6";
samsung,pin-function = <1>;
samsung,pin-pud = <0>;
samsung,pin-drv = <0>;
samsung,pin-val = <0>;
};
tpm_irq: tpm-irq {
samsung,pins = "gpx1-0";
samsung,pin-function = <0>;