arm64: dts: mediatek: mt8186: Fix systimer 13 MHz clock description

[ Upstream commit b391efba57ff085233d5ead5e01817bf4b71d999 ]

The systimer block derives its 13 MHz clock by dividing the main 26 MHz
oscillator clock by 2 internally. The 13 MHz clock is not a separate
oscillator.

Fix this by making the 13 MHz clock a divide-by-2 fixed factor clock,
taking its input from the main 26 MHz oscillator.

Fixes: 2e78620b1350 ("arm64: dts: Add MediaTek MT8186 dts and evaluation board and Makefile")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221201084229.3464449-5-wenst@chromium.org
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm64/boot/dts/mediatek/mt8186.dtsi b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
index 64693c1..fb32e3e 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8186.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
@@ -211,10 +211,12 @@
                };
        };
 
-       clk13m: oscillator-13m {
-               compatible = "fixed-clock";
+       clk13m: fixed-factor-clock-13m {
+               compatible = "fixed-factor-clock";
                #clock-cells = <0>;
-               clock-frequency = <13000000>;
+               clocks = <&clk26m>;
+               clock-div = <2>;
+               clock-mult = <1>;
                clock-output-names = "clk13m";
        };