Commit f58b884f authored by Ciprian Marian Costea's avatar Ciprian Marian Costea Committed by Shawn Guo
Browse files

arm64: dts: s32g2: Disable support for SD/eMMC UHS mode 



Disable SD/eMMC UHS modes for NXP boards which do not set VCCQ voltage
supply to 1.8V by default, such as S32G274A-EVB and S32G274A-RDB2.

Signed-off-by: default avatarCiprian Marian Costea <ciprianmarian.costea@oss.nxp.com>
Reviewed-by: default avatarMatthias Brugger <mbrugger@suse.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent f241340d

arch/arm64/boot/dts/freescale/s32g274a-evb.dts

+1 −0
Original line number Diff line number Diff line
@@ -39,5 +39,6 @@ &usdhc0 { 
	pinctrl-1 = <&pinctrl_usdhc0_100mhz>;

	pinctrl-2 = <&pinctrl_usdhc0_200mhz>;

	disable-wp;

	no-1-8-v;

	status = "okay";

};

arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts

+9 −0
Original line number Diff line number Diff line
@@ -45,5 +45,14 @@ &usdhc0 { 
	pinctrl-1 = <&pinctrl_usdhc0_100mhz>;

	pinctrl-2 = <&pinctrl_usdhc0_200mhz>;

	disable-wp;

	/* Remove no-1-8-v to enable higher speed modes for SD card.

	 * However, this is not enough to enable HS400 or HS200 modes for eMMC.

	 * In this case, the position of the resistor R797 must be changed

	 * from A to B before removing the property.

	 * If the property is removed without changing the resistor position,

	 * HS*00 may be enabled, but the interface might be unstable because of

	 * the wrong VCCQ voltage applied to the eMMC.

	 */

	no-1-8-v;

	status = "okay";

};