arm64: tegra: Use valid PWM period for VDD_GPU on Tegra210

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>

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
index 6a4b50aaa25d4c86860693b674f5fe8255defd41..85ee7e6b71ac6faf2c729c04bca290d596f72be0 100644 (file)
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
@@ -337,7 +337,7 @@
 
        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 553a5585edaca2305eee3f54268b1f55c8e800fb..c55716c336c10634805c18791dfdedda5a3d64be 100644 (file)
--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
@@ -821,7 +821,7 @@
 
        vdd_gpu: regulator@6 {
                compatible = "pwm-regulator";
-               pwms = <&pwm 1 4880>;
+               pwms = <&pwm 1 8000>;
 
                regulator-name = "VDD_GPU";
                regulator-min-microvolt = <710000>;