From 247bbeb74c186963d9365db3136d0285618bd9a7 Mon Sep 17 00:00:00 2001 From: Andrey Zhizhikin Date: Sat, 5 Dec 2020 17:29:17 +0000 Subject: [PATCH] ARM: dts: imx8m: increase off-on delay on the SD Vcc regulator Some SD Card controller and power circuitry has increased capacitance, which keeps the internal logic remains powered after regulator is switch off. This is generally the case when card is switched to SD104 mode, where a power cycle should be performed. In case if the card internal logic remains powered, it causes a subsequent failure of mode transition, effectively leading to failed enumeration. Introduce a delay of 20 msec in order to provide a possibility for internal card circuitry to drain voltages and perform a power cycle correctly. Similar fix is done in commit c49d0ac38a76 ("ARM: dts: rmobile: Increase off-on delay on the SD Vcc regulator") targeted Renesas SOCs. Signed-off-by: Andrey Zhizhikin Cc: Stefano Babic --- arch/arm/dts/imx8mm-beacon-kit-u-boot.dtsi | 4 ++++ arch/arm/dts/imx8mm-evk-u-boot.dtsi | 4 ++++ arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi | 4 ++++ arch/arm/dts/imx8mp-evk-u-boot.dtsi | 4 ++++ arch/arm/dts/imx8mq-evk-u-boot.dtsi | 5 +++++ arch/arm/dts/imx8mq-phanbell-u-boot.dtsi | 5 +++++ 6 files changed, 26 insertions(+) create mode 100644 arch/arm/dts/imx8mq-evk-u-boot.dtsi create mode 100644 arch/arm/dts/imx8mq-phanbell-u-boot.dtsi diff --git a/arch/arm/dts/imx8mm-beacon-kit-u-boot.dtsi b/arch/arm/dts/imx8mm-beacon-kit-u-boot.dtsi index fc1aebb2fe..6d80a529ae 100644 --- a/arch/arm/dts/imx8mm-beacon-kit-u-boot.dtsi +++ b/arch/arm/dts/imx8mm-beacon-kit-u-boot.dtsi @@ -37,6 +37,10 @@ /delete-property/ assigned-clock-rates; }; +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; + &fec1 { phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>; }; diff --git a/arch/arm/dts/imx8mm-evk-u-boot.dtsi b/arch/arm/dts/imx8mm-evk-u-boot.dtsi index b5c12105a9..9f77d3c6ff 100644 --- a/arch/arm/dts/imx8mm-evk-u-boot.dtsi +++ b/arch/arm/dts/imx8mm-evk-u-boot.dtsi @@ -46,6 +46,10 @@ u-boot,dm-spl; }; +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; + &pinctrl_reg_usdhc2_vmmc { u-boot,dm-spl; }; diff --git a/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi b/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi index 4419679d4c..98b0b9891b 100644 --- a/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi +++ b/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi @@ -47,6 +47,10 @@ u-boot,dm-spl; }; +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; + &pinctrl_uart2 { u-boot,dm-spl; }; diff --git a/arch/arm/dts/imx8mp-evk-u-boot.dtsi b/arch/arm/dts/imx8mp-evk-u-boot.dtsi index 24a93ac2d6..2452e9175c 100644 --- a/arch/arm/dts/imx8mp-evk-u-boot.dtsi +++ b/arch/arm/dts/imx8mp-evk-u-boot.dtsi @@ -48,6 +48,10 @@ u-boot,dm-spl; }; +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; + ®_usdhc2_vmmc { u-boot,dm-spl; }; diff --git a/arch/arm/dts/imx8mq-evk-u-boot.dtsi b/arch/arm/dts/imx8mq-evk-u-boot.dtsi new file mode 100644 index 0000000000..4712cf6a44 --- /dev/null +++ b/arch/arm/dts/imx8mq-evk-u-boot.dtsi @@ -0,0 +1,5 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) + +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; diff --git a/arch/arm/dts/imx8mq-phanbell-u-boot.dtsi b/arch/arm/dts/imx8mq-phanbell-u-boot.dtsi new file mode 100644 index 0000000000..4712cf6a44 --- /dev/null +++ b/arch/arm/dts/imx8mq-phanbell-u-boot.dtsi @@ -0,0 +1,5 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) + +®_usdhc2_vmmc { + u-boot,off-on-delay-us = <20000>; +}; -- 2.39.5