[PATCH v4 3/3] arm64: dts: ti: k3-j7200: Add support for higher speed modes in MMCSD subsystems

[Kishon Vijay Abraham I]

On 28/01/21 8:57 pm, Aswath Govindraju wrote:
> The following speed modes are now supported in J7200 SoC,
> - HS200 and HS400 modes at 1.8 V card voltage, in MMCSD0 subsystem [1].
> - UHS-I speed modes in MMCSD1 subsystem [1].
> 
> Add support for UHS-I modes by adding voltage regulator device tree nodes
> and corresponding pinmux details, to power cycle and voltage switch cards.
> Also set respective tags in sdhci0 and remove no-1-8-v tag from sdhci1
> device tree nodes.
> 
> [1] - section 12.3.6.1.1 MMCSD Features, in
>       https://www.ti.com/lit/ug/spruiu1a/spruiu1a.pdf
> 
> Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>

Reviewed-by: Kishon Vijay Abraham I <kishon at ti.com>
> ---
>  .../dts/ti/k3-j7200-common-proc-board.dts     | 31 +++++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     |  3 +-
>  2 files changed, 33 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> index 07d03ce05d9d..e670aaeb6c56 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> @@ -16,6 +16,29 @@
>  		stdout-path = "serial2:115200n8";
>  		bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
>  	};
> +
> +	vdd_mmc1: fixedregulator-sd {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vdd_mmc1";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		enable-active-high;
> +		gpios = <&exp2 2 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	vdd_sd_dv: gpio-regulator-vdd-sd-dv {
> +		compatible = "regulator-gpio";
> +		regulator-name = "vdd_sd_dv";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&vdd_sd_dv_pins_default>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		gpios = <&main_gpio0 55 GPIO_ACTIVE_HIGH>;
> +		states = <1800000 0x0
> +			  3300000 0x1>;
> +	};
>  };
>  
>  &wkup_pmx0 {
> @@ -70,6 +93,12 @@
>  			J721E_IOPAD(0x120, PIN_OUTPUT, 0) /* (T4) USB0_DRVVBUS */
>  		>;
>  	};
> +
> +	vdd_sd_dv_pins_default: vdd_sd_dv_pins_default {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0xd0, PIN_INPUT, 7) /* (T5) SPI0_D1.GPIO0_55 */
> +		>;
> +	};
>  };
>  
>  &wkup_uart0 {
> @@ -206,6 +235,8 @@
>  	/* SD card */
>  	pinctrl-0 = <&main_mmc1_pins_default>;
>  	pinctrl-names = "default";
> +	vmmc-supply = <&vdd_mmc1>;
> +	vqmmc-supply = <&vdd_sd_dv>;
>  	ti,driver-strength-ohm = <50>;
>  	disable-wp;
>  };
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> index 7a04a113f445..c9877b24fbae 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> @@ -520,6 +520,8 @@
>  		ti,trm-icp = <0x8>;
>  		bus-width = <8>;
>  		mmc-ddr-1_8v;
> +		mmc-hs200-1_8v;
> +		mmc-hs400-1_8v;
>  		dma-coherent;
>  	};
>  
> @@ -537,7 +539,6 @@
>  		ti,otap-del-sel-sdr50 = <0xc>;
>  		ti,otap-del-sel-sdr104 = <0x5>;
>  		ti,otap-del-sel-ddr50 = <0xc>;
> -		no-1-8-v;
>  		dma-coherent;
>  	};
>  
>