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dolcinir-vignesh
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arm64: dts: ti: am62-verdin: Enable pullup for eMMC data pins
Verdin AM62 board does not have external pullups on eMMC DAT1-DAT7 pins. 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, 10kohm-150kohm per JEDEC), which may exceed the recommended 50kohm max for 1.8V VCCQ - JEDEC JESD84-B51 Table 200 requires host-side pullups (R_DAT, 10kohm-100kohm) on all data lines to prevent bus floating Fixes: 316b802 ("arm64: dts: ti: add verdin am62") Cc: stable@vger.kernel.org Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com> Link: https://patch.msgid.link/20260320073032.10427-1-francesco@dolcini.it Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
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Lines changed: 10 additions & 10 deletions

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arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi

Lines changed: 10 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -572,16 +572,16 @@
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/* On-module eMMC */
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pinctrl_sdhci0: main-mmc0-default-pins {
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pinctrl-single,pins = <
575-
AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
576-
AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
577-
AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
578-
AM62X_IOPAD(0x210, PIN_INPUT, 0) /* (AA1) MMC0_DAT1 */
579-
AM62X_IOPAD(0x20c, PIN_INPUT, 0) /* (AA3) MMC0_DAT2 */
580-
AM62X_IOPAD(0x208, PIN_INPUT, 0) /* (Y4) MMC0_DAT3 */
581-
AM62X_IOPAD(0x204, PIN_INPUT, 0) /* (AB2) MMC0_DAT4 */
582-
AM62X_IOPAD(0x200, PIN_INPUT, 0) /* (AC1) MMC0_DAT5 */
583-
AM62X_IOPAD(0x1fc, PIN_INPUT, 0) /* (AD2) MMC0_DAT6 */
584-
AM62X_IOPAD(0x1f8, PIN_INPUT, 0) /* (AC2) MMC0_DAT7 */
575+
AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
576+
AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
577+
AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
578+
AM62X_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (AA1) MMC0_DAT1 */
579+
AM62X_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (AA3) MMC0_DAT2 */
580+
AM62X_IOPAD(0x208, PIN_INPUT_PULLUP, 0) /* (Y4) MMC0_DAT3 */
581+
AM62X_IOPAD(0x204, PIN_INPUT_PULLUP, 0) /* (AB2) MMC0_DAT4 */
582+
AM62X_IOPAD(0x200, PIN_INPUT_PULLUP, 0) /* (AC1) MMC0_DAT5 */
583+
AM62X_IOPAD(0x1fc, PIN_INPUT_PULLUP, 0) /* (AD2) MMC0_DAT6 */
584+
AM62X_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (AC2) MMC0_DAT7 */
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>;
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};
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