[PATCH 1/2] arm64: dts: amlogic: t7: use the real UART pclk

[Lucas Tanure]

uart_a lists the 24MHz crystal for all three of its clocks, because
the T7 clock controller driver did not exist when these boards were
added.

That leaves the real UART bus clock without a user, so the kernel
turns it off when it disables unused clocks at the end of boot, and
the board hangs.

Point uart_a at the real clocks, the way meson-s4.dtsi does, and drop
the placeholders from the two board files.

Fixes: 4fef056588f5 ("arm64: dts: amlogic-t7-a311d2-khadas-vim4: add initial device-tree")
Fixes: 6f048cc7a635 ("arm64: dts: add board AN400")
Signed-off-by: Lucas Tanure <tanure@xxxxxxxxx>
Assisted-by: Claude:claude-fable-5
---
 arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts       | 2 --
 arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts | 2 --
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi                   | 4 ++++
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts
index cab2ee9ea0d3..dcbcd08a78b9 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts
@@ -33,7 +33,5 @@ xtal: xtal-clk {
 };
 
 &uart_a {
-	clocks = <&xtal>, <&xtal>, <&xtal>;
-	clock-names = "xtal", "pclk", "baud";
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index c41525a34b72..677069e58f30 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -266,6 +266,4 @@ &sd_emmc_c {
 
 &uart_a {
 	status = "okay";
-	clocks = <&xtal>, <&xtal>, <&xtal>;
-	clock-names = "xtal", "pclk", "baud";
 };
diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
index cc371fcd1896..7847582e77ed 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
@@ -587,6 +587,10 @@ uart_a: serial@78000 {
 				compatible = "amlogic,t7-uart", "amlogic,meson-s4-uart";
 				reg = <0x0 0x78000 0x0 0x18>;
 				interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+				clocks = <&xtal>,
+					 <&clkc_periphs CLKID_SYS_UART_A>,
+					 <&xtal>;
+				clock-names = "xtal", "pclk", "baud";
 				status = "disabled";
 			};
 
-- 
2.55.0