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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/samsung,exynos-dw-mshc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title:
+ Samsung Exynos SoC specific extensions to the Synopsys Designware Mobile
+ Storage Host Controller
+
+maintainers:
+ - Jaehoon Chung <jh80.chung@samsung.com>
+ - Krzysztof Kozlowski <krzk@kernel.org>
+
+properties:
+ compatible:
+ enum:
+ - samsung,exynos4210-dw-mshc
+ - samsung,exynos4412-dw-mshc
+ - samsung,exynos5250-dw-mshc
+ - samsung,exynos5420-dw-mshc
+ - samsung,exynos5420-dw-mshc-smu
+ - samsung,exynos7-dw-mshc
+ - samsung,exynos7-dw-mshc-smu
+ - axis,artpec8-dw-mshc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 2
+ description:
+ Handle to "biu" and "ciu" clocks for the
+ bus interface unit clock and the card interface unit clock.
+
+ clock-names:
+ items:
+ - const: biu
+ - const: ciu
+
+ samsung,dw-mshc-ciu-div:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 7
+ description:
+ The divider value for the card interface unit (ciu) clock.
+
+ samsung,dw-mshc-ddr-timing:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ - description: CIU clock phase shift value for tx mode
+ minimum: 0
+ maximum: 7
+ - description: CIU clock phase shift value for rx mode
+ minimum: 0
+ maximum: 7
+ description:
+ The value of CUI clock phase shift value in transmit mode and CIU clock
+ phase shift value in receive mode for double data rate mode operation.
+ See also samsung,dw-mshc-hs400-timing property.
+
+ samsung,dw-mshc-hs400-timing:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ - description: CIU clock phase shift value for tx mode
+ minimum: 0
+ maximum: 7
+ - description: CIU clock phase shift value for rx mode
+ minimum: 0
+ maximum: 7
+ description: |
+ The value of CIU TX and RX clock phase shift value for HS400 mode
+ operation.
+ Valid values for SDR and DDR CIU clock timing::
+ - valid value for tx phase shift and rx phase shift is 0 to 7.
+ - when CIU clock divider value is set to 3, all possible 8 phase shift
+ values can be used.
+ - if CIU clock divider value is 0 (that is divide by 1), both tx and rx
+ phase shift clocks should be 0.
+ If missing, values from samsung,dw-mshc-ddr-timing property are used.
+
+ samsung,dw-mshc-sdr-timing:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ - description: CIU clock phase shift value for tx mode
+ minimum: 0
+ maximum: 7
+ - description: CIU clock phase shift value for rx mode
+ minimum: 0
+ maximum: 7
+ description:
+ The value of CIU clock phase shift value in transmit mode and CIU clock
+ phase shift value in receive mode for single data rate mode operation.
+ See also samsung,dw-mshc-hs400-timing property.
+
+ samsung,read-strobe-delay:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ RCLK (Data strobe) delay to control HS400 mode (Latency value for delay
+ line in Read path). If missing, default from hardware is used.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - samsung,dw-mshc-ddr-timing
+ - samsung,dw-mshc-sdr-timing
+
+allOf:
+ - $ref: "synopsys-dw-mshc-common.yaml#"
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - samsung,exynos5250-dw-mshc
+ - samsung,exynos5420-dw-mshc
+ - samsung,exynos7-dw-mshc
+ - samsung,exynos7-dw-mshc-smu
+ - axis,artpec8-dw-mshc
+ then:
+ required:
+ - samsung,dw-mshc-ciu-div
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/exynos5420.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ mmc@12220000 {
+ compatible = "samsung,exynos5420-dw-mshc";
+ interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x12220000 0x1000>;
+ clocks = <&clock CLK_MMC2>, <&clock CLK_SCLK_MMC2>;
+ clock-names = "biu", "ciu";
+ fifo-depth = <0x40>;
+ card-detect-delay = <200>;
+ samsung,dw-mshc-ciu-div = <3>;
+ samsung,dw-mshc-sdr-timing = <0 4>;
+ samsung,dw-mshc-ddr-timing = <0 2>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_wp &sd2_bus1 &sd2_bus4>;
+ bus-width = <4>;
+ cap-sd-highspeed;
+ max-frequency = <200000000>;
+ vmmc-supply = <&ldo19_reg>;
+ vqmmc-supply = <&ldo13_reg>;
+ sd-uhs-sdr50;
+ sd-uhs-sdr104;
+ sd-uhs-ddr50;
+ };