4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexandre Courbot <acourbot@xxxxxxxxxx>
commit 5e6b9a89afceadb1ee45472098f7d20af260335c upstream.
Add the VDD_GPU regulator (a GPIO-enabled PWM regulator) to the Jetson
TX1 board. This addition allows the GPU to be used provided the
bootloader properly enabled the GPU node.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
[as pointed out by Thierry on IRC, nobody has reported a bug
in the field, but using a new bootloader with a .dtb that
has the incorrect data, it will crash on boot]
Fixes: 336f79c7b6d7 ("arm64: tegra: Add NVIDIA Jetson TX1 Developer Kit support")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
@@ -21,6 +21,10 @@
reg = <0x0 0x80000000 0x1 0x0>;
};
+ gpu@57000000 {
+ vdd-supply = <&vdd_gpu>;
+ };
+
/* debug port */
serial@70006000 {
status = "okay";
@@ -291,4 +295,18 @@
clock-frequency = <32768>;
};
};
+
+ regulators {
+ vdd_gpu: regulator@100 {
+ compatible = "pwm-regulator";
+ reg = <100>;
+ pwms = <&pwm 1 4880>;
+ regulator-name = "VDD_GPU";
+ regulator-min-microvolt = <710000>;
+ regulator-max-microvolt = <1320000>;
+ enable-gpios = <&pmic 6 GPIO_ACTIVE_HIGH>;
+ regulator-ramp-delay = <80>;
+ regulator-enable-ramp-delay = <1000>;
+ };
+ };
};
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