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Message-Id: <20250509101419.460473-2-hao.zhang@coolkit.cn>
Date: Fri,  9 May 2025 18:14:18 +0800
From: Hao Zhang <hao.zhang@...lkit.cn>
To: heiko@...ech.de
Cc: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	tim@...thertop.org,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hao Zhang <hao.zhang@...lkit.cn>
Subject: [PATCH v2 1/2] ARM: dts: rockchip: Sonoff-iHost: adjust SDIO for stability

Reduce max-frequency from 50MHz to 25MHz to improve WiFi module stability
on some Sonoff iHost units. Remove unsupported or redundant properties,
and keep only minimal, validated configuration.

Signed-off-by: Hao Zhang <hao.zhang@...lkit.cn>
---
 arch/arm/boot/dts/rockchip/rv1126-sonoff-ihost.dtsi | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/rockchip/rv1126-sonoff-ihost.dtsi b/arch/arm/boot/dts/rockchip/rv1126-sonoff-ihost.dtsi
index 9a87dc0d5f66..088a069bb1a8 100644
--- a/arch/arm/boot/dts/rockchip/rv1126-sonoff-ihost.dtsi
+++ b/arch/arm/boot/dts/rockchip/rv1126-sonoff-ihost.dtsi
@@ -342,16 +342,14 @@ &saradc {
 
 &sdio {
 	bus-width = <4>;
-	cap-sd-highspeed;
 	cap-sdio-irq;
 	keep-power-in-suspend;
-	max-frequency = <50000000>;
+	max-frequency = <25000000>;
 	mmc-pwrseq = <&sdio_pwrseq>;
 	non-removable;
 	pinctrl-names = "default";
 	pinctrl-0 = <&sdmmc1_clk &sdmmc1_cmd &sdmmc1_bus4>;
 	rockchip,default-sample-phase = <90>;
-	sd-uhs-sdr50;
 	vmmc-supply = <&vcc3v3_sd>;
 	vqmmc-supply = <&vcc_1v8>;
 	status = "okay";
-- 
2.34.1


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