github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: dts: ti: am62-verdin: Enable pullup for eMMC data pins

Browse Source 
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: 316b80246b ("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>
This commit is contained in:
Francesco Dolcini 2026-03-20 08:30:30 +01:00 committed by Vignesh Raghavendra
parent 6ee0792d83
commit d532581081
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
View File

@ -572,16 +572,16 @@ AM62X_IOPAD(0x15c, PIN_INPUT, 0) /* (AB22) MDIO0_MDIO */ /* ETH_1_MDIO, SODIMM
/* On-module eMMC */
pinctrl_sdhci0: main-mmc0-default-pins {
pinctrl-single,pins = <
AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
AM62X_IOPAD(0x210, PIN_INPUT, 0) /* (AA1) MMC0_DAT1 */
AM62X_IOPAD(0x20c, PIN_INPUT, 0) /* (AA3) MMC0_DAT2 */
AM62X_IOPAD(0x208, PIN_INPUT, 0) /* (Y4) MMC0_DAT3 */
AM62X_IOPAD(0x204, PIN_INPUT, 0) /* (AB2) MMC0_DAT4 */
AM62X_IOPAD(0x200, PIN_INPUT, 0) /* (AC1) MMC0_DAT5 */
AM62X_IOPAD(0x1fc, PIN_INPUT, 0) /* (AD2) MMC0_DAT6 */
AM62X_IOPAD(0x1f8, PIN_INPUT, 0) /* (AC2) MMC0_DAT7 */
AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
AM62X_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (AA1) MMC0_DAT1 */
AM62X_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (AA3) MMC0_DAT2 */
AM62X_IOPAD(0x208, PIN_INPUT_PULLUP, 0) /* (Y4) MMC0_DAT3 */
AM62X_IOPAD(0x204, PIN_INPUT_PULLUP, 0) /* (AB2) MMC0_DAT4 */
AM62X_IOPAD(0x200, PIN_INPUT_PULLUP, 0) /* (AC1) MMC0_DAT5 */
AM62X_IOPAD(0x1fc, PIN_INPUT_PULLUP, 0) /* (AD2) MMC0_DAT6 */
AM62X_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (AC2) MMC0_DAT7 */
>;
};