diff mbox series

[1/3] arm64: dts: imx93-11x11-evk: set SION for cmd and data pad of USDHC

Message ID 20231017065048.1304294-1-haibo.chen@nxp.com
State Accepted
Commit bb89601282fc660d2bd312ac6e2baab0fe9e922c
Headers show
Series [1/3] arm64: dts: imx93-11x11-evk: set SION for cmd and data pad of USDHC | expand

Commit Message

Bough Chen Oct. 17, 2023, 6:50 a.m. UTC 
From: Haibo Chen <haibo.chen@nxp.com>

imx93 pad integrate has one issue, refer to ERR052021:

ERR052021 uSDHC: Sometimes uSDHC does not work under VDD_SOC low
		 drive mode and nominal mode
Description:
uSDHC PADs have one integration issue.
When CMD/DATA lines direction change from output to input, uSDHC
controller begin sampling, the integration issue will make input
enable signal from uSDHC propagated to the PAD with a long delay,
thus the new input value on the pad comes to uSDHC lately. The
uSDHC sampled the old input value and the sampling result is wrong.

Workaround:
Set uSDHC CMD/DATA PADs iomux register SION bit to 1, then PADs will
propagate input to uSDHC with no delay, so correct value is sampled.

This issue will wrongly trigger the start bit when sample the USDHC
command response, cause the USDHC trigger command CRC/index/endbit
error, which will finally impact the tuning pass window, espically
will impact the standard tuning logic, and can't find a correct delay
cell to get the best timing.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 .../boot/dts/freescale/imx93-11x11-evk.dts    | 30 ++++++++++---------
 1 file changed, 16 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
index 2b9d47716f75..021caf471bf6 100644
--- a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
@@ -237,18 +237,19 @@  MX93_PAD_DAP_TCLK_SWCLK__LPUART5_CTS_B		0x31e
 		>;
 	};
 
+	/* need to config the SION for data and cmd pad, refer to ERR052021 */
 	pinctrl_usdhc1: usdhc1grp {
 		fsl,pins = <
 			MX93_PAD_SD1_CLK__USDHC1_CLK		0x15fe
-			MX93_PAD_SD1_CMD__USDHC1_CMD		0x13fe
-			MX93_PAD_SD1_DATA0__USDHC1_DATA0	0x13fe
-			MX93_PAD_SD1_DATA1__USDHC1_DATA1	0x13fe
-			MX93_PAD_SD1_DATA2__USDHC1_DATA2	0x13fe
-			MX93_PAD_SD1_DATA3__USDHC1_DATA3	0x13fe
-			MX93_PAD_SD1_DATA4__USDHC1_DATA4	0x13fe
-			MX93_PAD_SD1_DATA5__USDHC1_DATA5	0x13fe
-			MX93_PAD_SD1_DATA6__USDHC1_DATA6	0x13fe
-			MX93_PAD_SD1_DATA7__USDHC1_DATA7	0x13fe
+			MX93_PAD_SD1_CMD__USDHC1_CMD		0x400013fe
+			MX93_PAD_SD1_DATA0__USDHC1_DATA0	0x400013fe
+			MX93_PAD_SD1_DATA1__USDHC1_DATA1	0x400013fe
+			MX93_PAD_SD1_DATA2__USDHC1_DATA2	0x400013fe
+			MX93_PAD_SD1_DATA3__USDHC1_DATA3	0x400013fe
+			MX93_PAD_SD1_DATA4__USDHC1_DATA4	0x400013fe
+			MX93_PAD_SD1_DATA5__USDHC1_DATA5	0x400013fe
+			MX93_PAD_SD1_DATA6__USDHC1_DATA6	0x400013fe
+			MX93_PAD_SD1_DATA7__USDHC1_DATA7	0x400013fe
 			MX93_PAD_SD1_STROBE__USDHC1_STROBE	0x15fe
 		>;
 	};
@@ -265,14 +266,15 @@  MX93_PAD_SD2_CD_B__GPIO3_IO00		0x31e
 		>;
 	};
 
+	/* need to config the SION for data and cmd pad, refer to ERR052021 */
 	pinctrl_usdhc2: usdhc2grp {
 		fsl,pins = <
 			MX93_PAD_SD2_CLK__USDHC2_CLK		0x15fe
-			MX93_PAD_SD2_CMD__USDHC2_CMD		0x13fe
-			MX93_PAD_SD2_DATA0__USDHC2_DATA0	0x13fe
-			MX93_PAD_SD2_DATA1__USDHC2_DATA1	0x13fe
-			MX93_PAD_SD2_DATA2__USDHC2_DATA2	0x13fe
-			MX93_PAD_SD2_DATA3__USDHC2_DATA3	0x13fe
+			MX93_PAD_SD2_CMD__USDHC2_CMD		0x400013fe
+			MX93_PAD_SD2_DATA0__USDHC2_DATA0	0x400013fe
+			MX93_PAD_SD2_DATA1__USDHC2_DATA1	0x400013fe
+			MX93_PAD_SD2_DATA2__USDHC2_DATA2	0x400013fe
+			MX93_PAD_SD2_DATA3__USDHC2_DATA3	0x400013fe
 			MX93_PAD_SD2_VSELECT__USDHC2_VSELECT	0x51e
 		>;
 	};