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-rw-r--r--board/chromebook/snow/linux-4.15-dts-tpm.patch27
1 files changed, 27 insertions, 0 deletions
diff --git a/board/chromebook/snow/linux-4.15-dts-tpm.patch b/board/chromebook/snow/linux-4.15-dts-tpm.patch
new file mode 100644
index 0000000000..c71ff1b584
--- /dev/null
+++ b/board/chromebook/snow/linux-4.15-dts-tpm.patch
@@ -0,0 +1,27 @@
+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 {
+