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ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz

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[ Upstream commit 828db68f4ff1ab6982a36a56522b585160dc8c8e ]

NXP and AzureWave don't recommend using SDIO bus mode 3.3V@50MHz 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: c2e4987e0e ("ARM: dts: imx6ull: add Toradex Colibri iMX6ULL support")
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Oleksandr Suvorov 2021-07-13 23:21:07 +03:00 • committed by Greg Kroah-Hartman
commit aecff98c3e
1 changed files with 1 additions and 0 deletions
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arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi
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@ -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;