[PATCH 6.5 251/739] arm64: tegra: Fix HSUART for Jetson AGX Orin

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6.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jon Hunter <jonathanh@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 cd13cf2381dde..513cc2cd0b668 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";
 		};
 
-- 
2.40.1






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