Subject: Re: [PATCH 1/2] arm: dts: imx7d-sdb: add SD3.0 support for usdhc1

From: Shawn Guo <[email-masked]>
Date: Sun, 13 Jan 2019 10:32:45 +0800

On Fri, Dec 28, 2018 at 09:28:30AM +0000, BOUGH CHEN wrote:
> Add usdhc1 support SD3.0.
> 
> Besides, add fsl,tuning-start-tap for all usdhc, imx usdhc IP
> logic require the tuning-start-tap larger than 10, to make
> sure the tuning logical can work normal.
> 
> Signed-off-by: Haibo Chen <[email-masked]>

For i.MX arm32 dts, please use prefix 'ARM: dts: ...'.

> ---
>  arch/arm/boot/dts/imx7d-sdb.dts | 55 +++++++++++++++++++++++++++------
>  arch/arm/boot/dts/imx7s.dtsi    |  6 ++++
>  2 files changed, 52 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
> index 202922ed3754..ded43decf46c 100644
> --- a/arch/arm/boot/dts/imx7d-sdb.dts
> +++ b/arch/arm/boot/dts/imx7d-sdb.dts
> @@ -87,6 +87,16 @@
>  		regulator-max-microvolt = <1800000>;
>  	};
>  
> +	reg_sd1_vmmc: regulator-sd1-vmmc {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VDD_SD1";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		gpio = <&gpio5 2 GPIO_ACTIVE_HIGH>;
> +		startup-delay-us = <200000>;
> +		enable-active-high;
> +	};
> +
>  	reg_brcm: regulator-brcm {
>  		compatible = "regulator-fixed";
>  		gpio = <&gpio4 21 GPIO_ACTIVE_HIGH>;
> @@ -408,12 +418,13 @@
>  };
>  
>  &usdhc1 {
> -	pinctrl-names = "default";
> -	pinctrl-0 = <&pinctrl_usdhc1>;
> +	pinctrl-names = "default", "state_100mhz", "state_200mhz";
> +	pinctrl-0 = <&pinctrl_usdhc1>, <&pinctrl_usdhc1_gpio>;
> +	pinctrl-1 = <&pinctrl_usdhc1_100mhz>, <&pinctrl_usdhc1_gpio>;
> +	pinctrl-2 = <&pinctrl_usdhc1_200mhz>, <&pinctrl_usdhc1_gpio>;
>  	cd-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
>  	wp-gpios = <&gpio5 1 GPIO_ACTIVE_HIGH>;
> -	wakeup-source;
> -	keep-power-in-suspend;

Why these changes?

> +	vmmc-supply = <&reg_sd1_vmmc>;
>  	status = "okay";
>  };
>  
> @@ -426,7 +437,6 @@
>  	keep-power-in-suspend;
>  	non-removable;
>  	vmmc-supply = <&reg_brcm>;
> -	fsl,tuning-step = <2>;
>  	status = "okay";
>  };
>  
> @@ -438,7 +448,6 @@
>  	assigned-clocks = <&clks IMX7D_USDHC3_ROOT_CLK>;
>  	assigned-clock-rates = <400000000>;
>  	bus-width = <8>;
> -	fsl,tuning-step = <2>;
>  	non-removable;
>  	status = "okay";
>  };
> @@ -638,6 +647,15 @@
>  			>;
>  		};
>  
> +		pinctrl_usdhc1_gpio: usdhc1_gpiogrp {
> +			fsl,pins = <
> +				MX7D_PAD_SD1_CD_B__GPIO5_IO0		0x59 /* CD */
> +				MX7D_PAD_SD1_WP__GPIO5_IO1		0x59 /* WP */
> +				MX7D_PAD_SD1_RESET_B__GPIO5_IO2		0x59 /* vmmc */
> +				MX7D_PAD_GPIO1_IO08__SD1_VSELECT	0x59 /* VSELECT */
> +			>;
> +		};
> +
>  		pinctrl_usdhc1: usdhc1grp {
>  			fsl,pins = <
>  				MX7D_PAD_SD1_CMD__SD1_CMD		0x59
> @@ -646,9 +664,28 @@
>  				MX7D_PAD_SD1_DATA1__SD1_DATA1		0x59
>  				MX7D_PAD_SD1_DATA2__SD1_DATA2		0x59
>  				MX7D_PAD_SD1_DATA3__SD1_DATA3		0x59
> -				MX7D_PAD_SD1_CD_B__GPIO5_IO0		0x59 /* CD */
> -				MX7D_PAD_SD1_WP__GPIO5_IO1		0x59 /* WP */
> -				MX7D_PAD_SD1_RESET_B__GPIO5_IO2		0x59 /* vmmc */
> +			>;
> +		};
> +
> +		pinctrl_usdhc1_100mhz: usdhc1grp_100mhz {
> +			fsl,pins = <
> +				MX7D_PAD_SD1_CMD__SD1_CMD		0x5a
> +				MX7D_PAD_SD1_CLK__SD1_CLK		0x1a
> +				MX7D_PAD_SD1_DATA0__SD1_DATA0		0x5a
> +				MX7D_PAD_SD1_DATA1__SD1_DATA1		0x5a
> +				MX7D_PAD_SD1_DATA2__SD1_DATA2		0x5a
> +				MX7D_PAD_SD1_DATA3__SD1_DATA3		0x5a
> +			>;
> +		};
> +
> +		pinctrl_usdhc1_200mhz: usdhc1grp_200mhz {
> +			fsl,pins = <
> +				MX7D_PAD_SD1_CMD__SD1_CMD		0x5b
> +				MX7D_PAD_SD1_CLK__SD1_CLK		0x1b
> +				MX7D_PAD_SD1_DATA0__SD1_DATA0		0x5b
> +				MX7D_PAD_SD1_DATA1__SD1_DATA1		0x5b
> +				MX7D_PAD_SD1_DATA2__SD1_DATA2		0x5b
> +				MX7D_PAD_SD1_DATA3__SD1_DATA3		0x5b
>  			>;
>  		};
>  
> diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
> index e88f53a4c7f4..bee8dc2f614b 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -1036,6 +1036,8 @@
>  					<&clks IMX7D_USDHC1_ROOT_CLK>;
>  				clock-names = "ipg", "ahb", "per";
>  				bus-width = <4>;
> +				fsl,tuning-step = <2>;

The commit log should mention the move of fsl,tuning-step from board
level dts to SoC level.

Shawn

> +				fsl,tuning-start-tap = <20>;
>  				status = "disabled";
>  			};
>  
> @@ -1048,6 +1050,8 @@
>  					<&clks IMX7D_USDHC2_ROOT_CLK>;
>  				clock-names = "ipg", "ahb", "per";
>  				bus-width = <4>;
> +				fsl,tuning-step = <2>;
> +				fsl,tuning-start-tap = <20>;
>  				status = "disabled";
>  			};
>  
> @@ -1060,6 +1064,8 @@
>  					<&clks IMX7D_USDHC3_ROOT_CLK>;
>  				clock-names = "ipg", "ahb", "per";
>  				bus-width = <4>;
> +				fsl,tuning-step = <2>;
> +				fsl,tuning-start-tap = <20>;
>  				status = "disabled";
>  			};
>  
> -- 
> 2.17.1
> 

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