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arm64: dts: amlogic: t7: use the real UART pclk

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uart_a listed 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.

Update the board DTS files to point uart_a's pclk to CLKID_SYS_UART_A
instead of the dummy crystal clock.

Fixes: 4fef056588 ("arm64: dts: amlogic-t7-a311d2-khadas-vim4: add initial device-tree")
Fixes: 6f048cc7a6 ("arm64: dts: add board AN400")
Signed-off-by: Lucas Tanure <tanure@linux.com>
Assisted-by: Claude:claude-fable-5
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260823115335.102219-2-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Lucas Tanure 2026-08-23 12:53:34 +01:00 committed by Neil Armstrong
parent cee9395acd
commit 882de800bf
2 changed files with 2 additions and 2 deletions
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2
arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-an400.dts
View File

@ -33,7 +33,7 @@ xtal: xtal-clk {
};
&uart_a {
clocks = <&xtal>, <&xtal>, <&xtal>;
clocks = <&xtal>, <&clkc_periphs CLKID_SYS_UART_A>, <&xtal>;
clock-names = "xtal", "pclk", "baud";
status = "okay";
};

2
arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
View File

@ -266,6 +266,6 @@ &sd_emmc_c {
&uart_a {
status = "okay";
clocks = <&xtal>, <&xtal>, <&xtal>;
clocks = <&xtal>, <&clkc_periphs CLKID_SYS_UART_A>, <&xtal>;
clock-names = "xtal", "pclk", "baud";
};