linux-kernel - [PATCH 04/10] dt-bindings: spi: Add bindings for spi-dw-mchp

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Date:   Wed, 13 May 2020 16:00:25 +0200
From:   Lars Povlsen <lars.povlsen@...rochip.com>
To:     Mark Brown <broonie@...nel.org>, SoC Team <soc@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Lars Povlsen <lars.povlsen@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 04/10] dt-bindings: spi: Add bindings for spi-dw-mchp

This add DT bindings for the Microsemi/Microchip SPI controller used
in various SoC's. It describes the "mscc,ocelot-spi" and
"mscc,jaguar2-spi" bindings.

Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
---
 .../bindings/spi/mscc,ocelot-spi.yaml         | 60 +++++++++++++++++++
 .../bindings/spi/snps,dw-apb-ssi.txt          |  7 +--
 MAINTAINERS                                   |  1 +
 3 files changed, 63 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/mscc,ocelot-spi.yaml

diff --git a/Documentation/devicetree/bindings/spi/mscc,ocelot-spi.yaml b/Documentation/devicetree/bindings/spi/mscc,ocelot-spi.yaml
new file mode 100644
index 0000000000000..a3ac0fa576553
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/mscc,ocelot-spi.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/spi/mscc,ocelot-spi.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Microsemi Vcore-III SPI Communication Controller
+
+maintainers:
+  - Alexandre Belloni <alexandre.belloni@...tlin.com>
+  - Lars Povlsen <lars.povlsen@...rochip.com>
+
+allOf:
+  - $ref: "spi-controller.yaml#"
+
+description: |
+  The Microsemi Vcore-III SPI controller is a general purpose SPI
+  controller based upon the Designware SPI controller. It uses an 8
+  byte rx/tx fifo.
+
+properties:
+  compatible:
+    enum:
+      - mscc,ocelot-spi
+      - mscc,jaguar2-spi
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    minItems: 2
+    items:
+      - description: Designware SPI registers
+      - description: CS override registers
+
+  clocks:
+    maxItems: 1
+
+  reg-io-width:
+    description: |
+      The I/O register width (in bytes) implemented by this device.
+    items:
+       enum: [ 2, 4 ]
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+examples:
+  - |
+    spi0: spi@...000 {
+      compatible = "mscc,ocelot-spi";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      reg = <0x101000 0x100>, <0x3c 0x18>;
+      interrupts = <9>;
+      clocks = <&ahb_clk>;
+    };
diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
index 3ed08ee9feba4..5e1849be7bae5 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
@@ -1,10 +1,8 @@
 Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface.

 Required properties:
-- compatible : "snps,dw-apb-ssi" or "mscc,<soc>-spi", where soc is "ocelot" or
-  "jaguar2", or "amazon,alpine-dw-apb-ssi"
-- reg : The register base for the controller. For "mscc,<soc>-spi", a second
-  register set is required (named ICPU_CFG:SPI_MST)
+- compatible : "snps,dw-apb-ssi" or "amazon,alpine-dw-apb-ssi"
+- reg : The register base for the controller.
 - interrupts : One interrupt, used by the controller.
 - #address-cells : <1>, as required by generic SPI binding.
 - #size-cells : <0>, also as required by generic SPI binding.
@@ -38,4 +36,3 @@ Example:
 		cs-gpios = <&gpio0 13 0>,
 			   <&gpio0 14 0>;
 	};
-
diff --git a/MAINTAINERS b/MAINTAINERS
index 1db598723a1d8..6472240b8391b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11231,6 +11231,7 @@ L:	linux-mips@...r.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/mips/mscc.txt
 F:	Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
+F:	Documentation/devicetree/bindings/spi/mscc,ocelot-spi.yaml
 F:	arch/mips/boot/dts/mscc/
 F:	arch/mips/configs/generic/board-ocelot.config
 F:	arch/mips/generic/board-ocelot.c
--
2.26.2