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authorAlexandre Courbot <acourbot@nvidia.com>2016-12-02 22:57:55 +0300
committerArnd Bergmann <arnd@arndb.de>2016-12-08 02:23:33 +0300
commit5e6b9a89afceadb1ee45472098f7d20af260335c (patch)
treeb50ab07b35d9fc97a1cdab7c437339a4d62c0b04 /arch/arm64/boot
parent253e80651ed814cc2eab76280d5595c9d3a35aef (diff)
downloadlinux-5e6b9a89afceadb1ee45472098f7d20af260335c.tar.xz
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: 336f79c7b6d7 ("arm64: tegra: Add NVIDIA Jetson TX1 Developer Kit support") Cc: stable@vger.kernel.org #v4.5+ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/boot')
-rw-r--r--arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
index 5fda583351d7..906fb836d241 100644
--- 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>;
+ };
+ };
};