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From a267434b15bc06c72708327fb1110bf565577a15 Mon Sep 17 00:00:00 2001
From: Peter Robinson <pbrobinson@gmail.com>
Date: Tue, 3 Nov 2020 16:53:02 +0000
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 6a4b50aaa25d..85ee7e6b71ac 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
@@ -337,7 +337,7 @@ psci {
vdd_gpu: regulator@100 {
compatible = "pwm-regulator";
- 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 2282ea1c6279..195a43e2356b 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
@@ -818,7 +818,7 @@ vdd_cpu: regulator@5 {
vdd_gpu: regulator@6 {
compatible = "pwm-regulator";
- pwms = <&pwm 1 4880>;
+ pwms = <&pwm 1 8000>;
regulator-name = "VDD_GPU";
regulator-min-microvolt = <710000>;
--
2.28.0
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