[PATCH v2 3/4] dt-bindings: mmc: samsung,exynos-dw-mshc: convert to dtschema

Krzysztof Kozlowski
2022-06-05T16:37:42Z

Convert the Samsung Exynos SoC specific extensions to the Synopsys
Designware Mobile Storage Host Controller to DT schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
.../bindings/mmc/exynos-dw-mshc.txt | 94 -----------
.../bindings/mmc/samsung,exynos-dw-mshc.yaml | 159 ++++++++++++++++++
2 files changed, 159 insertions(+), 94 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
create mode 100644 Documentation/devicetree/bindings/mmc/samsung,exynos-dw-mshc.yaml

diff --git a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
deleted file mode 100644
index 753e9d7d8956..000000000000
--- a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
+++ /dev/null
@@ -1,94 +0,0 @@
-* Samsung Exynos specific extensions to the Synopsys Designware Mobile
- Storage Host Controller
-
-The Synopsys designware mobile storage host controller is used to interface
-a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
-differences between the core Synopsys dw mshc controller properties described
-by synopsys-dw-mshc.txt and the properties used by the Samsung Exynos specific
-extensions to the Synopsys Designware Mobile Storage Host Controller.
-
-Required Properties:
-
-* compatible: should be
- - "samsung,exynos4210-dw-mshc": for controllers with Samsung Exynos4210
- specific extensions.
- - "samsung,exynos4412-dw-mshc": for controllers with Samsung Exynos4412
- specific extensions.
- - "samsung,exynos5250-dw-mshc": for controllers with Samsung Exynos5250
- specific extensions.
- - "samsung,exynos5420-dw-mshc": for controllers with Samsung Exynos5420
- specific extensions.
- - "samsung,exynos7-dw-mshc": for controllers with Samsung Exynos7
- specific extensions.
- - "samsung,exynos7-dw-mshc-smu": for controllers with Samsung Exynos7
- specific extensions having an SMU.
- - "axis,artpec8-dw-mshc": for controllers with ARTPEC-8 specific
- extensions.
-
-* samsung,dw-mshc-ciu-div: Specifies the divider value for the card interface
- unit (ciu) clock. This property is applicable only for Exynos5 SoC's and
- ignored for Exynos4 SoC's. The valid range of divider value is 0 to 7.
-
-* samsung,dw-mshc-sdr-timing: Specifies 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. Refer notes below for the order of the cells and the
- valid values.
-
-* samsung,dw-mshc-ddr-timing: Specifies 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. Refer notes below for the order of the cells and the
- valid values.
-* samsung,dw-mshc-hs400-timing: Specifies the value of CIU TX and RX clock phase
- shift value for hs400 mode operation.
-
- Notes for the sdr-timing and ddr-timing values:
-
- The order of the cells should be
- - First Cell: CIU clock phase shift value for tx mode.
- - Second Cell: CIU clock phase shift value for rx mode.
-
- Valid values for SDR and DDR CIU clock timing for Exynos5250:
- - 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.
-
-* samsung,read-strobe-delay: RCLK (Data strobe) delay to control HS400 mode
- (Latency value for delay line in Read path)
-
-Required properties for a slot (Deprecated - Recommend to use one slot per host):
-
-* gpios: specifies a list of gpios used for command, clock and data bus. The
- first gpio is the command line and the second gpio is the clock line. The
- rest of the gpios (depending on the bus-width property) are the data lines in
- no particular order. The format of the gpio specifier depends on the gpio
- controller.
-(Deprecated - Refer to Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt)
-
-Example:
-
- The MSHC controller node can be split into two portions, SoC specific and
- board specific portions as listed below.
-
- dwmmc0@12200000 {
- compatible = "samsung,exynos5250-dw-mshc";
- reg = <0x12200000 0x1000>;
- interrupts = <0 75 0>;
- #address-cells = <1>;
- #size-cells = <0>;
- };
-
- dwmmc0@12200000 {
- cap-mmc-highspeed;
- cap-sd-highspeed;
- broken-cd;
- fifo-depth = <0x80>;
- card-detect-delay = <200>;
- samsung,dw-mshc-ciu-div = <3>;
- samsung,dw-mshc-sdr-timing = <2 3>;
- samsung,dw-mshc-ddr-timing = <1 2>;
- samsung,dw-mshc-hs400-timing = <0 2>;
- samsung,read-strobe-delay = <90>;
- bus-width = <8>;
- };
diff --git a/Documentation/devicetree/bindings/mmc/samsung,exynos-dw-mshc.yaml b/Documentation/devicetree/bindings/mmc/samsung,exynos-dw-mshc.yaml
new file mode 100644
index 000000000000..80c557e938a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/samsung,exynos-dw-mshc.yaml
@@ -0,0 +1,159 @@
+# 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,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;
+ };
--
2.34.1