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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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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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charset="utf-8" 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 */ >; 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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 61NNbVXt1677488; 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 2/3] arm64: dts: ti: k3-am62l-evm: Disable MMC1 internal pulls on data pins Date: Mon, 23 Feb 2026 17:37:30 -0600 Message-ID: <20260223233731.2690472-3-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A103:EE_|IA1PR10MB6218:EE_ X-MS-Office365-Filtering-Correlation-Id: 12429152-cdae-4e75-13b0-08de73348442 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|82310400026|1800799024; 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charset="utf-8" AM62L EVM has external 47K 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 (~24.2K) creates a ~2x mismatch vs DAT0 (47K external only). Removing internal pullups results in DAT1-3 matching DAT0 at 47K - 47K external alone is within the recommended range for 1.8V signaling (10K min, 50K recommended max) - both internal and external pullups enabled equals unnecessary power consumption Fixes: 00fb4c73b67d ("arm64: dts: ti: k3-am62l: add initial reference board= file") [0] https://www.ti.com/lit/zip/SPRCAL6 Signed-off-by: Judith Mendez Reviewed-by: Moteen Shah --- arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts= /ti/k3-am62l3-evm.dts index cae04cce33736..bd876c68aa347 100644 --- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts @@ -272,9 +272,9 @@ mmc1_pins_default: mmc1-default-pins { AM62LX_IOPAD(0x0230, PIN_INPUT, 0) /* (Y3) MMC1_CMD */ AM62LX_IOPAD(0x0228, PIN_OUTPUT, 0) /* (Y2) MMC1_CLK */ AM62LX_IOPAD(0x0224, PIN_INPUT, 0) /* (AA1) MMC1_DAT0 */ - AM62LX_IOPAD(0x0220, PIN_INPUT_PULLUP, 0) /* (Y4) MMC1_DAT1 */ - AM62LX_IOPAD(0x021c, PIN_INPUT_PULLUP, 0) /* (AA2) MMC1_DAT2 */ - AM62LX_IOPAD(0x0218, PIN_INPUT_PULLUP, 0) /* (AB2) MMC1_DAT3 */ + AM62LX_IOPAD(0x0220, PIN_INPUT, 0) /* (Y4) MMC1_DAT1 */ + AM62LX_IOPAD(0x021c, PIN_INPUT, 0) /* (AA2) MMC1_DAT2 */ + AM62LX_IOPAD(0x0218, PIN_INPUT, 0) /* (AB2) MMC1_DAT3 */ AM62LX_IOPAD(0x0234, PIN_INPUT, 0) /* (B6) MMC1_SDCD */ >; 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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 61NNbVXu1677488; 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 3/3] arm64: dts: ti: k3-am62-lp-sk: Enable internal pulls for MMC0 data pins Date: Mon, 23 Feb 2026 17:37:31 -0600 Message-ID: <20260223233731.2690472-4-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00036F43:EE_|DSVPR10MB997798:EE_ X-MS-Office365-Filtering-Correlation-Id: 4bfde66a-25ad-4fb9-9e7d-08de733484b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; 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charset="utf-8" AM62 LP SK board does not have external pullups on MMC0 DAT1-DAT7 pins [0]. Enable internal pullups on DAT1-DAT7 considering: - without a host-side pullup, these lines rely solely on the eMMC device's internal pullup (R_int, 10-150K per JEDEC), which may exceed the recommended 50K max for 1.8V VCCQ - JEDEC JESD84-B51 Table 200 requires host-side pullups (R_DAT, 10K-100K) on all data lines to prevent bus floating Fixes: a0b8da04153e ("arm64: dts: ti: k3-am62*: Move eMMC pinmux to top lev= el board file") [0] https://www.ti.com/lit/zip/SPRR471 Signed-off-by: Judith Mendez Reviewed-by: Moteen Shah --- arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts= /ti/k3-am62-lp-sk.dts index 3e2d8f6695351..8a556fbbe08b7 100644 --- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts +++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts @@ -88,13 +88,13 @@ main_mmc0_pins_default: main-mmc0-default-pins { AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (V3) MMC0_CMD */ AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (Y1) MMC0_CLK */ AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (V2) MMC0_DAT0 */ - AM62X_IOPAD(0x210, PIN_INPUT, 0) /* (V1) MMC0_DAT1 */ - AM62X_IOPAD(0x20c, PIN_INPUT, 0) /* (W2) MMC0_DAT2 */ - AM62X_IOPAD(0x208, PIN_INPUT, 0) /* (W1) MMC0_DAT3 */ - AM62X_IOPAD(0x204, PIN_INPUT, 0) /* (Y2) MMC0_DAT4 */ - AM62X_IOPAD(0x200, PIN_INPUT, 0) /* (W3) MMC0_DAT5 */ - AM62X_IOPAD(0x1fc, PIN_INPUT, 0) /* (W4) MMC0_DAT6 */ - AM62X_IOPAD(0x1f8, PIN_INPUT, 0) /* (V4) MMC0_DAT7 */ + AM62X_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (V1) MMC0_DAT1 */ + AM62X_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (W2) MMC0_DAT2 */ + AM62X_IOPAD(0x208, PIN_INPUT_PULLUP, 0) /* (W1) MMC0_DAT3 */ + AM62X_IOPAD(0x204, PIN_INPUT_PULLUP, 0) /* (Y2) MMC0_DAT4 */ + AM62X_IOPAD(0x200, PIN_INPUT_PULLUP, 0) /* (W3) MMC0_DAT5 */ + AM62X_IOPAD(0x1fc, PIN_INPUT_PULLUP, 0) /* (W4) MMC0_DAT6 */ + AM62X_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (V4) MMC0_DAT7 */ >; }; =20 --=20 2.52.0