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arm64: tegra: Update Jetson TX1 GPU regulator timings

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commit ece6031ece upstream.

The GPU regulator enable ramp delay for Jetson TX1 is set to 1ms which
not sufficient because the enable ramp delay has been measured to be
greater than 1ms. Furthermore, the downstream kernels released by NVIDIA
for Jetson TX1 are using a enable ramp delay 2ms and a settling delay of
160us. Update the GPU regulator enable ramp delay for Jetson TX1 to be
2ms and add a settling delay of 160us.

Cc: stable@vger.kernel.org
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Fixes: 5e6b9a89af ("arm64: tegra: Add VDD_GPU regulator to Jetson TX1")
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jon Hunter 2019-06-20 09:17:01 +01:00 committed by Greg Kroah-Hartman
parent 042451b921
commit 7ebddd5fe2
1 changed files with 2 additions and 1 deletions
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arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
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@ -330,7 +330,8 @@ vdd_gpu: regulator@100 {
regulator-max-microvolt = <1320000>;
enable-gpios = <&pmic 6 GPIO_ACTIVE_HIGH>;
regulator-ramp-delay = <80>;
regulator-enable-ramp-delay = <1000>;
regulator-enable-ramp-delay = <2000>;
regulator-settling-time-us = <160>;
};
};
};