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Tue, 13 Jul 2021 20:21:20 +0000 From: Oleksandr Suvorov To: linux-next@vger.kernel.org Cc: Oleksandr Suvorov , Fabio Estevam , NXP Linux Team , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , Stefan Agner , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz Date: Tue, 13 Jul 2021 23:21:07 +0300 Message-Id: <20210713202108.449831-1-oleksandr.suvorov@toradex.com> X-Mailer: git-send-email 2.31.1 X-ClientProxiedBy: PR1P264CA0026.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:19f::13) 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 PR1P264CA0026.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:19f::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Tue, 13 Jul 2021 20:21:19 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e0583060-6179-498d-adad-08d9463bc6d6 X-MS-TrafficTypeDiagnostic: PA4PR05MB7885: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: toradex.com X-MS-Exchange-CrossTenant-Network-Message-Id: e0583060-6179-498d-adad-08d9463bc6d6 X-MS-Exchange-CrossTenant-AuthSource: PAXPR05MB8285.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jul 2021 20:21:20.4131 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: d9995866-0d9b-4251-8315-093f062abab4 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: nm2Ll/AMWQYue68x+K6Hfuj2gYXRADgbkj1OetNT6wWtjs7bGUfHJocULD4w78zHMAUxLv0ydEMdBuj0X4H0Y9jAMNvcemBmDufFJ1pr48Y= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR05MB7885 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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: c2e4987e0e02 ("ARM: dts: imx6ull: add Toradex Colibri iMX6ULL support") Signed-off-by: Oleksandr Suvorov Reviewed-by: Fabio Estevam --- Changes in v2: - add Fixes field - add Reviewed-by taken from Fabio END 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 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;