From: Hao Zhang <hao.zhang@coolkit.cn>
To: heiko@sntech.de
Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
tim@feathertop.org, linux-rockchip@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, "hao.zhang" <hao.zhang@coolkit.cn>
Subject: [PATCH 1/2] ARM: dts: rockchip: Sonoff-iHost: adjust SDIO for stability
Date: Fri, 9 May 2025 16:56:56 +0800 [thread overview]
Message-ID: <20250509085657.309934-2-hao.zhang@coolkit.cn> (raw)
In-Reply-To: <20250509085657.309934-1-hao.zhang@coolkit.cn>
From: "hao.zhang" <hao.zhang@coolkit.cn>
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@coolkit.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
next prev parent reply other threads:[~2025-05-09 9:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-09 8:56 [PATCH 0/2] arm: dts: rockchip: Adapt to IO domain and SDIO for Sonoff iHost Hao Zhang
2025-05-09 8:56 ` Hao Zhang [this message]
2025-05-09 9:24 ` [PATCH 1/2] ARM: dts: rockchip: Sonoff-iHost: adjust SDIO for stability Krzysztof Kozlowski
2025-05-09 8:56 ` [PATCH 2/2] ARM: dts: rockchip: Sonoff-iHost: correct IO domain voltages Hao Zhang
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