Document the device-tree bindings for Realtek SoCs mmc driver. Signed-off-by: Jyan Chou <jyanchou@xxxxxxxxxxx> --- v4 -> v5: - Fix compatible to match filename. - Remove unused property, e.g.,cqe, resets, clock-freq-min-max. - Fix indentation. v3 -> v4: - Describe the items to make properties and item easy to understand. - Fix examples' indentation and compiling error. - Drop useless properties. v2 -> v3: - Modify dt-bindings' content and description. - Fix coding style. - Update the list of maintainers. v1 -> v2: - Add dt-bindings. --- .../bindings/mmc/realtek,rtd-dw-cqe-emmc.yaml | 157 ++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/realtek,rtd-dw-cqe-emmc.yaml diff --git a/Documentation/devicetree/bindings/mmc/realtek,rtd-dw-cqe-emmc.yaml b/Documentation/devicetree/bindings/mmc/realtek,rtd-dw-cqe-emmc.yaml new file mode 100644 index 000000000000..f422a216ff93 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/realtek,rtd-dw-cqe-emmc.yaml @@ -0,0 +1,157 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mmc/realtek,rtd-dw-cqe-emmc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Realtek DesignWare mobile storage host controller + +description: + Realtek uses the Synopsys DesignWare mobile storage host controller + to interface a SoC with storage medium. This file documents the Realtek + specific extensions. + +maintainers: + - Jyan Chou <jyanchou@xxxxxxxxxxx> + +allOf: + - $ref: mmc-controller.yaml# + +properties: + compatible: + enum: + - realtek,rtd-dw-cqe-emmc + + reg: + items: + - description: emmc base address + - description: cqhci base address + + reg-names: + items: + - const: emmc + - const: cqhci + + interrupts: + maxItems: 1 + + clocks: + description: Handles to input clocks + + clock-names: + items: + - const: biu + - const: ciu + - const: vp0 + - const: vp1 + + clock-frequency: + description: + Operating frequency of realtek emmc controller clock + minimum: 300000 + maximum: 400000000 + + vmmc-supply: + description: + Handle to fixed-voltage supply for the card power. + + pinctrl-0: + description: + should contain default/high speed pin ctrl. + maxItems: 1 + + pinctrl-1: + description: + should contain sdr50 mode pin ctrl. + maxItems: 1 + + pinctrl-2: + description: + should contain ddr50 mode pin ctrl. + maxItems: 1 + + pinctrl-3: + description: + should contain hs200 speed pin ctrl. + maxItems: 1 + + pinctrl-4: + description: + should contain hs400 speed pin ctrl. + maxItems: 1 + + pinctrl-5: + description: + should contain tune0 pin ctrl. + maxItems: 1 + + pinctrl-6: + description: + should contain tune1 pin ctrl. + maxItems: 1 + + pinctrl-7: + description: + should contain tune2 pin ctrl. + maxItems: 1 + + pinctrl-8: + description: + should contain tune3 pin ctrl. + maxItems: 1 + + pinctrl-9: + description: + should contain tune4 pin ctrl. + maxItems: 1 + + pinctrl-names: + maxItems: 10 + +required: + - compatible + - reg + - reg-names + - interrupts + - clocks + - clock-names + - clock-frequency + - vmmc-supply + - pinctrl-names + - pinctrl-0 + - pinctrl-1 + - pinctrl-3 + - pinctrl-4 + - pinctrl-5 + - pinctrl-6 + - pinctrl-7 + - pinctrl-8 + - pinctrl-9 + +additionalProperties: false + +examples: + - | + emmc: mmc@12000 { + compatible = "realtek,rtd-dw-cqe-emmc"; + reg = <0x00012000 0x00600>, + <0x00012180 0x00060>; + reg-names = "emmc", "cqhci"; + interrupts = <0 42 4>; + clocks = <&cc 22>, <&cc 26>, <&cc 121>, <&cc 122>; + clock-names = "biu", "ciu", "vp0", "vp1"; + clock-frequency = <400000>; + vmmc-supply = <®_vcc1v8>; + pinctrl-names = "default", "sdr50", "ddr50", "hs200", "hs400", + "tune0","tune1", "tune2","tune3", "tune4"; + pinctrl-0 = <&emmc_pins_sdr50>; + pinctrl-1 = <&emmc_pins_sdr50>; + pinctrl-2 = <&emmc_pins_ddr50>; + pinctrl-3 = <&emmc_pins_hs200>; + pinctrl-4 = <&emmc_pins_hs400>; + pinctrl-5 = <&emmc_pins_tune0>; + pinctrl-6 = <&emmc_pins_tune1>; + pinctrl-7 = <&emmc_pins_tune2>; + pinctrl-8 = <&emmc_pins_tune3>; + pinctrl-9 = <&emmc_pins_tune4>; + }; -- 2.42.0
