From:   Gabriel Somlo <gsomlo@gmail.com>
To:     linux-kernel@vger.kernel.org
Cc:     robh+dt@kernel.org, devicetree@vger.kernel.org,
        ulf.hansson@linaro.org, linux-mmc@vger.kernel.org,
        kgugala@antmicro.com, mholenko@antmicro.com, krakoczy@antmicro.com,
        mdudek@internships.antmicro.com, paulus@ozlabs.org, joel@jms.id.au,
        shorne@gmail.com, geert@linux-m68k.org,
        david.abdurachmanov@sifive.com, florent@enjoy-digital.fr,
        rdunlap@infradead.org, andy.shevchenko@gmail.com, hdanton@sina.com
Subject: [PATCH v14 2/3] dt-bindings: mmc: Add bindings for LiteSDCard
Date:   Thu, 13 Jan 2022 12:02:59 -0500
Message-Id: <20220113170300.3555651-3-gsomlo@gmail.com>
In-Reply-To: <20220113170300.3555651-1-gsomlo@gmail.com>
References: <20220113170300.3555651-1-gsomlo@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

LiteSDCard is a small footprint, configurable SDCard core for
FPGA based SoCs.

Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
---

New in v14:
  - add missing `vmmc-supply = ...` property to example section

>New in v13:
>  - add `vmmc-supply` requirement

 .../devicetree/bindings/mmc/litex,mmc.yaml    | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/litex,mmc.yaml

diff --git a/Documentation/devicetree/bindings/mmc/litex,mmc.yaml b/Documentation/devicetree/bindings/mmc/litex,mmc.yaml
new file mode 100644
index 000000000000..ef9e0da44bf8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/litex,mmc.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/litex,mmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LiteX LiteSDCard device
+
+maintainers:
+  - Gabriel Somlo <gsomlo@gmail.com>
+
+description: |
+  LiteSDCard is a small footprint, configurable SDCard core for FPGA based
+  system on chips.
+
+  The hardware source is Open Source and can be found on at
+  https://github.com/enjoy-digital/litesdcard/.
+
+allOf:
+  - $ref: mmc-controller.yaml#
+
+properties:
+  compatible:
+    const: litex,mmc
+
+  reg:
+    items:
+      - description: PHY registers
+      - description: CORE registers
+      - description: DMA Reader buffer
+      - description: DMA Writer buffer
+      - description: IRQ registers
+    minItems: 4
+
+  reg-names:
+    items:
+      - const: phy
+      - const: core
+      - const: reader
+      - const: writer
+      - const: irq
+    minItems: 4
+
+  clocks:
+    maxItems: 1
+    description:
+      Handle to reference clock.
+
+  vmmc-supply:
+    description:
+      Handle to fixed-voltage supply for the card power.
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - vmmc-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    mmc: mmc@12005000 {
+        compatible = "litex,mmc";
+        reg = <0x12005000 0x100>,
+              <0x12003800 0x100>,
+              <0x12003000 0x100>,
+              <0x12004800 0x100>,
+              <0x12004000 0x100>;
+        reg-names = "phy", "core", "reader", "writer", "irq";
+        clocks = <&reference_clk>;
+        vmmc-supply = <&vreg_mmc>;
+        interrupts = <4>;
+    };
-- 
2.31.1