diff options
| author | Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com> | 2024-08-30 14:33:47 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2024-10-08 17:24:59 +0800 |
| commit | f58b884f8cfe686345cd5b090c9191637f72488c (patch) | |
| tree | a024f0ff190d167f8988be82e6dadeac71e4a090 /arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts | |
| parent | f241340dca727d0492db0b60e63ad8018bdf2183 (diff) | |
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: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts')
| -rw-r--r-- | arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts index 8739f63771bc..aaa61a8ad0da 100644 --- a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts +++ b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts @@ -45,5 +45,14 @@ 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"; }; |