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Date: Tue, 10 Aug 2021 19:29:58 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Oleksandr Suvorov <oleksandr.suvorov@...adex.com>, Fabio Estevam <festevam@...il.com>, Shawn Guo <shawnguo@...nel.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.19 04/54] ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz From: Oleksandr Suvorov <oleksandr.suvorov@...adex.com> [ Upstream commit 828db68f4ff1ab6982a36a56522b585160dc8c8e ] NXP and AzureWave don't recommend using SDIO bus mode 3.3V@...Hz due to noise affecting the wireless throughput. Colibri iMX6ULL uses only 3.3V signaling for Wi-Fi module AW-CM276NF. Limit the SDIO Clock on Colibri iMX6ULL to 25MHz. Fixes: c2e4987e0e02 ("ARM: dts: imx6ull: add Toradex Colibri iMX6ULL support") Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com> Reviewed-by: Fabio Estevam <festevam@...il.com> Signed-off-by: Shawn Guo <shawnguo@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi b/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi index 038d8c90f6df..621396884c31 100644 --- a/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi +++ b/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi @@ -43,6 +43,7 @@ assigned-clock-rates = <0>, <198000000>; cap-power-off-card; keep-power-in-suspend; + max-frequency = <25000000>; mmc-pwrseq = <&wifi_pwrseq>; no-1-8-v; non-removable; -- 2.30.2
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