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Mon, 23 Feb 2026 17:37:31 -0600 Received: from judy-hp.dhcp.ti.com (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 61NNbVXs1677488; Mon, 23 Feb 2026 17:37:31 -0600 From: Judith Mendez To: Judith Mendez , Nishanth Menon , Vignesh Raghavendra CC: Tero Kristo , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , , , , Moteen Shah , Andrew Davis Subject: [PATCH v2 1/3] arm64: dts: ti: k3-am62p5-sk: Disable MMC1 internal pulls on data pins Date: Mon, 23 Feb 2026 17:37:29 -0600 Message-ID: <20260223233731.2690472-2-jm@ti.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260223233731.2690472-1-jm@ti.com> References: <20260223233731.2690472-1-jm@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A103:EE_|DSWPR10MB997825:EE_ X-MS-Office365-Filtering-Correlation-Id: 84d180e4-3109-4032-01f0-08de733483d2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|36860700013; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org AM62P SK has external 10K pullups on MMC1 DAT1-DAT3 pins [0]. Disable internal pullups on DAT1-DAT3 so that each line has a single pullup source: - with both pullups enabled, the effective parallel resistance on DAT1-3 (~8.33K) drops below the 10K minimum pullup requirement for data lines (per SD Physical Layer Specification) - removing internal pullups makes DAT1-3 match DAT0 10K external pullup so its consistent and within spec - both internal and external pullups enabled equals unnecessary power consumption Fixes: c00504ea42c0 ("arm64: dts: ti: k3-am62p5-sk: Updates for SK EVM") [0] https://www.ti.com/lit/zip/SPRR487 Signed-off-by: Judith Mendez Reviewed-by: Moteen Shah --- arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts index 4f7f6f95b02ef..35baa777b9121 100644 --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts @@ -271,9 +271,9 @@ main_mmc1_pins_default: main-mmc1-default-pins { AM62PX_IOPAD(0x023c, PIN_INPUT, 0) /* (H20) MMC1_CMD */ AM62PX_IOPAD(0x0234, PIN_OUTPUT, 0) /* (J24) MMC1_CLK */ AM62PX_IOPAD(0x0230, PIN_INPUT, 0) /* (H21) MMC1_DAT0 */ - AM62PX_IOPAD(0x022c, PIN_INPUT_PULLUP, 0) /* (H23) MMC1_DAT1 */ - AM62PX_IOPAD(0x0228, PIN_INPUT_PULLUP, 0) /* (H22) MMC1_DAT2 */ - AM62PX_IOPAD(0x0224, PIN_INPUT_PULLUP, 0) /* (H25) MMC1_DAT3 */ + AM62PX_IOPAD(0x022c, PIN_INPUT, 0) /* (H23) MMC1_DAT1 */ + AM62PX_IOPAD(0x0228, PIN_INPUT, 0) /* (H22) MMC1_DAT2 */ + AM62PX_IOPAD(0x0224, PIN_INPUT, 0) /* (H25) MMC1_DAT3 */ AM62PX_IOPAD(0x0240, PIN_INPUT, 0) /* (D23) MMC1_SDCD */ >; bootph-all; -- 2.52.0