6.4-stable review patch. If anyone has any objections, please let me know.
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From: Jon Hunter jonathanh@nvidia.com
[ Upstream commit 861dbb2b15b1049113887fb95e856f7123eea0cc ]
After commit 71de0a054d0e ("arm64: tegra: Drop serial clock-names and reset-names") was applied, the HSUART failed to probe and the following error is seen:
serial-tegra 3100000.serial: Couldn't get the reset serial-tegra: probe of 3100000.serial failed with error -2
Commit 71de0a054d0e ("arm64: tegra: Drop serial clock-names and reset-names") is correct because the "reset-names" property is not needed for 8250 UARTs. However, the "reset-names" is required for the HSUART and should have been populated as part of commit ff578db7b693 ("arm64: tegra: Enable UART instance on 40-pin header") that enabled the HSUART for Jetson AGX Orin. Fix this by populating the "reset-names" property for the HSUART on Jetson AGX Orin.
Fixes: ff578db7b693 ("arm64: tegra: Enable UART instance on 40-pin header") Signed-off-by: Jon Hunter jonathanh@nvidia.com Signed-off-by: Thierry Reding treding@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts b/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts index caa9e952a149c..a1194c4e15f0e 100644 --- a/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts +++ b/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts @@ -2010,6 +2010,7 @@ interrupt-controller@2a40000 {
serial@3100000 { compatible = "nvidia,tegra194-hsuart"; + reset-names = "serial"; status = "okay"; };