kumquat-buildroot/board/chromebook/snow/linux-4.15-dts-tpm.patch
Alex Suykov 842138aaa5 chromebook snow: bump kernel to 4.15
No other changes necessary, 4.15 builds and boots fine.

Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2018-03-05 23:19:33 +01:00

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Diff

Some versions of u-boot for this Chromebook check for tpm node
in the device tree and fail badly (reboot) if it is not found.
While not exactly correct, it is much easier to patch the mainline
device tree to match u-boot expectations than to fix u-boot on
this device.
See https://code.google.com/p/chromium/issues/detail?id=220169
and https://lkml.org/lkml/2013/3/4/242
Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
--- a/arch/arm/boot/dts/exynos5250-snow-common.dtsi
+++ b/arch/arm/boot/dts/exynos5250-snow-common.dtsi
@@ -466,6 +466,11 @@
status = "okay";
samsung,i2c-sda-delay = <100>;
samsung,i2c-max-bus-freq = <66000>;
+
+ tpm {
+ compatible = "infineon,slb9635tt";
+ reg = <0x20>;
+ };
};
&i2c_5 {