linux-kernel - [PATCH 2/6] arm64: dts: amlogic: a1: align the mmc clock setup

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Message-Id: <20260114-amlogic-mmc-clocks-followup-v1-2-a999fafbe0aa@baylibre.com>
Date: Wed, 14 Jan 2026 18:08:49 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Kevin Hilman <khilman@...libre.com>, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Xianwei Zhao <xianwei.zhao@...ogic.com>, 
 Yixun Lan <yixun.lan@...ogic.com>, Nan Li <nan.li@...ogic.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH 2/6] arm64: dts: amlogic: a1: align the mmc clock setup

The amlogic MMC driver operate with the assumption that MMC clock
is configured to provide 24MHz. It uses this path for low
rates such as 400kHz.

A1 is particular in the way that is already has the mmc clock set
to 24MHz by forcing the mux to select the board crystal. It works
too, it is just slightly less readable.

Align with what is being done with the other Amlogic platforms.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index 27b68ed85c4c..348411411f3d 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
@@ -674,11 +674,12 @@ sd_emmc: mmc@...00 {
 				clock-names = "core",
 					      "clkin0",
 					      "clkin1";
-				assigned-clocks = <&clkc_periphs CLKID_SD_EMMC_SEL2>;
-				assigned-clock-parents = <&xtal>;
 				resets = <&reset RESET_SD_EMMC_A>;
 				power-domains = <&pwrc PWRC_SD_EMMC_ID>;
 				status = "disabled";
+
+				assigned-clocks = <&clkc_periphs CLKID_SD_EMMC>;
+				assigned-clock-rates = <24000000>;
 			};
 		};
 

-- 
2.47.3