[PATCH v2 1/2] ARM64: dts: meson-gxbb: add MMC support

[robh@kernel.org (Rob Herring)]

On Wed, Aug 03, 2016 at 04:18:42PM -0700, Kevin Hilman wrote:
> Add binding and basic support for the SD/eMMC controller on Amlogic
> S905/GXBB devices.
> 
> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
> ---
>  .../devicetree/bindings/mmc/amlogic,meson-gxbb.txt | 29 +++++++++
>  .../arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 74 ++++++++++++++++++++++
>  arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi   | 71 +++++++++++++++++++++
>  arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi        | 36 ++++++++++-
>  4 files changed, 209 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/mmc/amlogic,meson-gxbb.txt
> 
> diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gxbb.txt b/Documentation/devicetree/bindings/mmc/amlogic,meson-gxbb.txt
> new file mode 100644
> index 000000000000..2bfdf47018c5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gxbb.txt
> @@ -0,0 +1,29 @@
> +Amlogic SD / eMMC controller for S905/GXBB family SoCs
> +
> +The MMC 5.1 compliant host controller on Amlogic provides the
> +interface for SD, eMMC and SDIO devices.
> +
> +This file documents the properties in addition to those available in
> +the MMC core bindings, documented by mmc.txt.
> +
> +Required properties:
> +- compatible : contains "amlogic,meson-gxbb"
> +- clocks     : A list of phandle + clock-specifier pairs for the clocks listed in clock-names.
> +- clock-names: Should contain the following:
> +	"core" - Main peripheral bus clock
> +	"clkin0" - Parent clock of internal mux
> +	"clkin1" - Other parent clock of internal mux
> +  The driver has an interal mux clock which switches between clkin0 and clkin1 depending on the
> +  clock rate requested by the MMC core.
> +
> +Example:
> +
> +	sd_emmc_a: mmc at 70000 {
> +        	compatible = "amlogic,meson-gxbb-mmc";
> +		reg = <0x0 0x70000 0x0 0x2000>;
> +                interrupts = < GIC_SPI 216 IRQ_TYPE_EDGE_RISING>;
> +		clocks = <&clkc CLKID_SD_EMMC_A>, <&xtal>, <&clkc CLKID_FCLK_DIV2>;
> +		clock-names = "core", "clkin0", "clkin1";
> +		pinctrl-0 = <&emmc_pins>;
> +	};
> +
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> index 90a84c514d3d..f41d8fe5c706 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> @@ -73,6 +73,45 @@
>  			default-state = "off";
>  		};
>  	};
> +
> +	mmc_iv: gpio-regulator {
> +		compatible = "regulator-gpio";
> +
> +		regulator-name = "mmc-gpio-supply";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpios = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>;
> +		gpio-states = <0 1>;
> +
> +		/*
> +		 * Based on ODROID-C2 schematics:
> +		 * signal name: IO_TF_3V3N_1V8, GPIOAO bit 3
> +		 */
> +		states = <3300000 0
> +			  1800000 1>;

There are multiple things wrong in this node based on the regulator-gpio 
documentation.

> +	};
> +
> +	vcc1v8: regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC1V8";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-always-on;
> +	};
> +
> +	vcc3v3: regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC3V3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +	};
> +
> +	emmc_pwrseq: emmc-pwrseq {
> +		compatible = "mmc-pwrseq-emmc";
> +		reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
> +	};
>  };
>  
>  &uart_AO {
> @@ -87,3 +126,38 @@
>  	pinctrl-names = "default";
>  };
>  
> +&sd_emmc_b {
> +	status = "okay";
> +	pinctrl-0 = <&sdcard_pins>;
> +	pinctrl-names = "default";
> +
> +	bus-width = <4>;
> +	cap-sd-highspeed;
> +	max-frequency = <100000000>;
> +
> +	cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
> +	cd-inverted;
> +
> +	vmmc-supply = <&mmc_iv>;
> +	voltage-ranges = <1800 3300>;
> +};
> +
> +&sd_emmc_c {
> +	status = "okay";
> +	pinctrl-0 = <&emmc_pins>;
> +	pinctrl-names = "default";
> +
> +	bus-width = <8>;
> +	cap-sd-highspeed;
> +	max-frequency = <200000000>;
> +	non-removable;
> +	disable-wp;
> +	cap-mmc-highspeed;
> +	mmc-ddr-1_8v;
> +	mmc-hs200-1_8v;
> +
> +	mmc-pwrseq = <&emmc_pwrseq>;
> +	voltage-ranges = <1800 3300>;
> +	vmmc-supply = <&vcc3v3>;
> +	vmmcq-sumpply = <&vcc1v8>;
> +};
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi
> index f4f30f674b4c..77698815943a 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi
> @@ -57,6 +57,42 @@
>  		device_type = "memory";
>  		reg = <0x0 0x0 0x0 0x40000000>;
>  	};
> +
> +	mmc_iv: gpio-regulator {
> +		compatible = "regulator-gpio";
> +
> +		regulator-name = "mmc-gpio-supply";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpios = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;
> +		gpio-states = <0 1>;
> +
> +		/* Based on P200 schematics, signal CARD_1.8V/3.3V_CTR */
> +		states = <1800000 0
> +			  3300000 1>;
> +	};
> +
> +	vddio_boot: regulator {
[...]
> +	vcc_3v3: regulator {

This won't even compile as you have the same node name twice.

> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC_3V3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +	};
> +
> +	emmc_pwrseq: emmc-pwrseq {
> +		compatible = "mmc-pwrseq-emmc";
> +		reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
> +	};
>  };
>  
>  /* This UART is brought out to the DB9 connector */
> @@ -72,3 +108,38 @@
>  	pinctrl-names = "default";
>  };
>  
> +&sd_emmc_b {
> +	status = "okay";
> +	pinctrl-0 = <&sdcard_pins>;
> +	pinctrl-names = "default";
> +
> +	bus-width = <4>;
> +	cap-sd-highspeed;
> +	max-frequency = <100000000>;
> +
> +	cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
> +	cd-inverted;
> +
> +	voltage-ranges = <1800 3300>;
> +	vmmc-supply = <&mmc_iv>;
> +};
> +
> +&sd_emmc_c {
> +	status = "okay";
> +	pinctrl-0 = <&emmc_pins>;
> +	pinctrl-names = "default";
> +
> +	bus-width = <8>;
> +	cap-sd-highspeed;
> +	cap-mmc-highspeed;
> +	max-frequency = <200000000>;
> +	non-removable;
> +	disable-wp;
> +	mmc-ddr-1_8v;
> +	mmc-hs200-1_8v;
> +
> +	mmc-pwrseq = <&emmc_pwrseq>;
> +	voltage-ranges = <1800 3300>;
> +	vmmc-supply = <&vcc_3v3>;
> +	vmmcq-sumpply = <&vddio_boot>;
> +};
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> index 35c8b2beb05c..2c200f96467c 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> @@ -247,7 +247,8 @@
>  					mux {
>  						groups = "emmc_nand_d07",
>  						       "emmc_cmd",
> -						       "emmc_clk";
> +						       "emmc_clk",
> +						       "emmc_ds";
>  						function = "emmc";
>  					};
>  				};
> @@ -330,6 +331,39 @@
>  			#address-cells = <2>;
>  			#size-cells = <2>;
>  			ranges = <0x0 0x0 0x0 0xd0000000 0x0 0x200000>;
> +
> +			sd_emmc_a: mmc at 70000 {
> +				compatible = "amlogic,meson-gxbb-mmc";
> +				reg = <0x0 0x70000 0x0 0x2000>;
> +				interrupts = <GIC_SPI 216 IRQ_TYPE_EDGE_RISING>;
> +				clocks = <&clkc CLKID_SD_EMMC_A>,
> +					 <&xtal>,
> +					 <&clkc CLKID_FCLK_DIV2>;
> +				clock-names = "core", "clkin0", "clkin1";
> +				status = "disabled";
> +			};
> +
> +			sd_emmc_b: mmc at 72000 {
> +				compatible = "amlogic,meson-gxbb-mmc";
> +				reg = <0x0 0x72000 0x0 0x2000>;
> +				interrupts = <GIC_SPI 217 IRQ_TYPE_EDGE_RISING>;
> +				clocks = <&clkc CLKID_SD_EMMC_B>,
> +					 <&xtal>,
> +					 <&clkc CLKID_FCLK_DIV2>;
> +				clock-names = "core", "clkin0", "clkin1";
> +				status = "disabled";
> +			};
> +
> +			sd_emmc_c: mmc at 74000 {
> +				compatible = "amlogic,meson-gxbb-mmc";
> +				reg = <0x0 0x74000 0x0 0x2000>;
> +				interrupts = <GIC_SPI 218 IRQ_TYPE_EDGE_RISING>;
> +				clocks = <&clkc CLKID_SD_EMMC_C>,
> +					 <&xtal>,
> +					 <&clkc CLKID_FCLK_DIV2>;
> +				clock-names = "core", "clkin0", "clkin1";
> +				status = "disabled";
> +			};
>  		};
>  
>  		ethmac: ethernet at c9410000 {
> -- 
> 2.9.0
> 
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