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There are a few issues with the GPU regulator defined for Jetson Nano
which are:
1. The GPU regulator is a PWM based regulator and not a fixed voltage
regulator.
2. The output voltages for the GPU regulator are not correct.
3. The regulator enable ramp delay is too short for the regulator and
needs to be increased. 2ms should be sufficient.
4. This is the same regulator used on Jetson TX1 and so make the ramp
delay and settling time the same as Jetson TX1.
Cc: stable@vger.kernel.org
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Fixes: 6772cd0eacc8 ("arm64: tegra: Add NVIDIA Jetson Nano Developer Kit support")
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Signed-off-by: Thierry Reding <treding@nvidia.com>
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Jetson Nano implements CPU sleep via PSCI, much like any of the other
Tegra X1 platforms. Enable the sleep states to allow the CPU to go into
lower power states when idle.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The Jetson Nano has two ID EEPROMs, one for the module and another for
the carrier board. Add both to the device tree so that they can be read
from at runtime.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The Jetson Nano Developer Kit is a Tegra X1 based development board. It
is similar to Jetson TX1 but it is not pin compatible. It features 4 GB
of LPDDR4, an SPI NOR flash for early boot firmware and an SD card slot
used for storage.
HDMI 2.0 or DP 1.2 are available for display, four USB ports (3 USB 2.0
and 1 USB 3.0) can be used to attach a variety of peripherals and a PCI
Ethernet controller provides onboard network connectivity. An M.2 Key-E
slot with PCIe x1 adds additional possibilities.
A 40-pin header on the board can be used to extend the capabilities and
exposed interfaces of the Jetson Nano.
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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