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From:   Chen-Yu Tsai <wenst@chromium.org>
To:     Matthias Brugger <matthias.bgg@gmail.com>
Cc:     Chen-Yu Tsai <wenst@chromium.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        =?UTF-8?q?N=C3=ADcolas=20F=20=2E=20R=20=2E=20A=20=2E=20Prado?= 
        <nfraprado@collabora.com>
Subject: [PATCH 4/4] arm64: dts: mediatek: mt8186: Fix systimer 13 MHz clock description
Date:   Thu,  1 Dec 2022 16:42:29 +0800
Message-Id: <20221201084229.3464449-5-wenst@chromium.org>
In-Reply-To: <20221201084229.3464449-1-wenst@chromium.org>
References: <20221201084229.3464449-1-wenst@chromium.org>
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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>
---
 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 4a2f7ad3c6f0..209f26f12dbc 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
@@ -215,10 +215,12 @@ 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";
 	};
 
-- 
2.38.1.584.g0f3c55d4c2-goog