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arm64: tegra: Add VDD_GPU regulator to Jetson TX1 

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@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
[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: 336f79c7b6 ("arm64: tegra: Add NVIDIA Jetson TX1 Developer Kit support")
Cc: stable@vger.kernel.org #v4.5+
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
hifive-unleashed-5.1
Alexandre Courbot 2016-12-02 20:57:55 +01:00 committed by Arnd Bergmann
parent 253e80651e
commit 5e6b9a89af
1 changed files with 18 additions and 0 deletions
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18
arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
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@ -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>;
};
};
};