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authorDoug Anderson <dianders@chromium.org>2014-07-16 02:38:39 +0900
committerKukjin Kim <kgene.kim@samsung.com>2014-07-16 02:39:18 +0900
commitac5ce09e140c0238a8fb61d1c198ce9945e8be47 (patch)
tree08cef643e86306b997be0099c2090faed22ce5a5 /arch/arm/boot/dts/exynos5420-peach-pit.dts
parenta8d80b6be83a45c80295cac6e9b9f4d6a279321f (diff)
downloadop-kernel-dev-ac5ce09e140c0238a8fb61d1c198ce9945e8be47.zip
op-kernel-dev-ac5ce09e140c0238a8fb61d1c198ce9945e8be47.tar.gz
ARM: dts: Add mask-tpm-reset node in exynos5420-peach-pit
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> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/boot/dts/exynos5420-peach-pit.dts')
-rw-r--r--arch/arm/boot/dts/exynos5420-peach-pit.dts12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index 6c7cab0..c7b2bba 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -211,6 +211,9 @@
&pinctrl_0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&mask_tpm_reset>;
+
max98090_irq: max98090-irq {
samsung,pins = "gpx0-2";
samsung,pin-function = <0>;
@@ -218,6 +221,15 @@
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>;
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