linux-kernel - [PATCH v2 1/3] dt-bindings: mmc: Add bindings for StarFive

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Date:   Tue, 27 Dec 2022 19:58:54 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     <linux-riscv@...ts.infradead.org>, <devicetree@...r.kernel.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...ux.starfivetech.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/3] dt-bindings: mmc: Add bindings for StarFive

Add documentation to describe StarFive
designware mobile storage host controller driver.

Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
---
 .../bindings/mmc/starfive,jh7110-mmc.yaml     | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml

diff --git a/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
new file mode 100644
index 000000000000..430dd5f24933
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/starfive,jh7110-mmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive Designware Mobile Storage Host Controller
+
+description:
+  StarFive uses the Synopsys designware mobile storage host controller
+  to interface a SoC with storage medium such as eMMC or SD/MMC cards.
+
+allOf:
+  - $ref: synopsys-dw-mshc-common.yaml#
+
+maintainers:
+  - William Qiu <william.qiu@...rfivetech.com>
+
+properties:
+  compatible:
+    const: starfive,jh7110-mmc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: biu clock
+      - description: ciu clock
+
+  clock-names:
+    items:
+      - const: biu
+      - const: ciu
+
+  interrupts:
+    maxItems: 1
+
+  starfive,syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      arg0:arg0 is syscon.
+      arg1:arg1 is syscon register offset, used to enable MMC function.
+      arg2:arg2 is used to enable the register shift of the MMC function.
+      arg3:arg3 is used to enable the register mask of the MMC function.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+  - starfive,syscon
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    mmc@...10000 {
+        compatible = "starfive,jh7110-mmc";
+        reg = <0x16010000 0x10000>;
+        clocks = <&syscrg 91>,
+                 <&syscrg 93>;
+        clock-names = "biu","ciu";
+        resets = <&syscrg 64>;
+        reset-names = "reset";
+        interrupts = <74>;
+        fifo-depth = <32>;
+        fifo-watermark-aligned;
+        data-addr = <0>;
+        starfive,syscon = <&syscon 0x14 0x1a 0x7c000000>;
+    };
-- 
2.34.1