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-rw-r--r--SOURCES/arm64-tegra-Use-valid-PWM-period-for-VDD_GPU-on-Tegra210.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/SOURCES/arm64-tegra-Use-valid-PWM-period-for-VDD_GPU-on-Tegra210.patch b/SOURCES/arm64-tegra-Use-valid-PWM-period-for-VDD_GPU-on-Tegra210.patch
new file mode 100644
index 0000000..cd37e70
--- /dev/null
+++ b/SOURCES/arm64-tegra-Use-valid-PWM-period-for-VDD_GPU-on-Tegra210.patch
@@ -0,0 +1,48 @@
+From a58d581e212b3acbc65e56384e6bc60bb109f29a Mon Sep 17 00:00:00 2001
+From: Peter Robinson <pbrobinson@gmail.com>
+Date: Fri, 7 Aug 2020 15:51:42 +0100
+Subject: [PATCH] arm64: tegra: Use valid PWM period for VDD_GPU on Tegra210
+
+From: Thierry Reding <treding@nvidia.com>
+
+The PWM on Tegra210 can run at a maximum frequency of 48 MHz and cannot
+reach the minimum period is 5334 ns. The currently configured period of
+4880 ns is not within the valid range, so set it to 8000 ns. This value
+was taken from the downstream DTS files and seems to work fine.
+
+Signed-off-by: Thierry Reding <treding@nvidia.com>
+Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
+---
+ arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 2 +-
+ arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+index cc6ed45a2b485..e2e984a75f601 100644
+--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
++++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+@@ -346,7 +346,7 @@ regulators {
+ vdd_gpu: regulator@100 {
+ compatible = "pwm-regulator";
+ reg = <100>;
+- pwms = <&pwm 1 4880>;
++ pwms = <&pwm 1 8000>;
+ regulator-name = "VDD_GPU";
+ regulator-min-microvolt = <710000>;
+ regulator-max-microvolt = <1320000>;
+diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+index 9bc52fdb393c8..ebaac57853138 100644
+--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
++++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+@@ -789,7 +789,7 @@ vdd_cpu: regulator@5 {
+ vdd_gpu: regulator@6 {
+ compatible = "pwm-regulator";
+ reg = <6>;
+- pwms = <&pwm 1 4880>;
++ pwms = <&pwm 1 8000>;
+ regulator-name = "VDD_GPU";
+ regulator-min-microvolt = <710000>;
+ regulator-max-microvolt = <1320000>;
+--
+2.26.2
+