| Message ID | 20210713195416.277153-1-oleksandr.suvorov@toradex.com |
|---|---|
| State | Accepted |
| Commit | 828db68f4ff1ab6982a36a56522b585160dc8c8e |
| Headers | show
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Tue, 13 Jul 2021 19:54:45 +0000 From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> To: linux-next@vger.kernel.org Cc: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>, Fabio Estevam <festevam@gmail.com>, NXP Linux Team <linux-imx@nxp.com>, Pengutronix Kernel Team <kernel@pengutronix.de>, Rob Herring <robh+dt@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Shawn Guo <shawnguo@kernel.org>, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz Date: Tue, 13 Jul 2021 22:54:16 +0300 Message-Id: <20210713195416.277153-1-oleksandr.suvorov@toradex.com> X-Mailer: git-send-email 2.31.1 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: FR3P281CA0044.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:4a::7) To PAXPR05MB8285.eurprd05.prod.outlook.com (2603:10a6:102:dd::24) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from cryobook.toradex.int (82.193.109.226) by FR3P281CA0044.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:4a::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.12 via Frontend Transport; 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ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz
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diff --git a/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi b/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi index a0545431b3dc..9f1e38282bee 100644 --- a/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi +++ b/arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi @@ -43,6 +43,7 @@ &usdhc2 { 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;
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. Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> --- arch/arm/boot/dts/imx6ull-colibri-wifi.dtsi | 1 + 1 file changed, 1 insertion(+)