From: Chen-Yu Tsai <wenst@chromium.org>
Date: Thu, 1 Dec 2022 16:42:29 +0800
Subject: [PATCH] arm64: dts: mediatek: mt8186: Fix systimer 13 MHz clock
 description
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: b391efba57ff085233d5ead5e01817bf4b71d999

[ 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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm64/boot/dts/mediatek/mt8186.dtsi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8186.dtsi b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
index c326aeb3..857b0c22 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
@@ -214,10 +214,12 @@ l3_0: l3-cache {
 		};
 	};
 
-	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";
 	};
 
-- 
2.35.3