linux-kernel - [PATCH V2 1/2] dt-bindings: usb: misc: Add binding for Microchip usb2244 Controller

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Date:   Mon, 22 Nov 2021 11:58:33 +0530
From:   Piyush Mehta <piyush.mehta@...inx.com>
To:     <gregkh@...uxfoundation.org>, <robh+dt@...nel.org>,
        <mka@...omium.org>, <ravisadineni@...omium.org>,
        <stern@...land.harvard.edu>, <alcooperx@...il.com>,
        <michal.simek@...inx.com>
CC:     <piyush.mehta@...inx.com>, <linux-usb@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <git@...inx.com>, <sgoud@...inx.com>
Subject: [PATCH V2 1/2] dt-bindings: usb: misc: Add binding for Microchip usb2244 Controller

Microchip's USB224x family of Hi-Speed USB 2.0 flash media card controllers
provides an ultra-fast interface between a USB host controller and flash
media cards.

Add dt-bindings documentation for Microchip's usb2244 Controller.
USB224x is a USB 2.0 compliant ultra fast USB 2.0 multi-format,
SD/MMC, and MS Flash Media Controllers.

Signed-off-by: Piyush Mehta <piyush.mehta@...inx.com>
---
Changes for V2:
- Update reset polarity, make reset ACTIVE LOW in the dt-binding document.
- Added usbsd node under the usb controller (usb0) node.
- Remove Warning: decoded text below may be mangled, UTF-8 assumed.

Review comments:
Link: https://lore.kernel.org/lkml/CAL_JsqKu6vr3iCz1G7MtK6gyqAvn4s4mpuLOwPzJDEmyZeROig@mail.gmail.com/
---
 .../devicetree/bindings/usb/microchip,usb2244.yaml | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/microchip,usb2244.yaml

diff --git a/Documentation/devicetree/bindings/usb/microchip,usb2244.yaml b/Documentation/devicetree/bindings/usb/microchip,usb2244.yaml
new file mode 100644
index 0000000..1854313
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/microchip,usb2244.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/usb/microchip,usb2244.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Bindings for the Microchip USB2244 Ultra Fast USB-SD Controller
+
+description:
+  Microchip USB224x is a USB 2.0 compliant, Hi-Speed bulk only mass
+  storage class peripheral controller intended for reading and writing
+  to popular flash media from the xDPicture Card, Memory Stick (MS),
+  Secure Digital (SD), and MultiMediaCard (MMC) families.
+
+  USB224x is a flash media card reader solution fully compliant with the
+  USB 2.0 specification.
+
+maintainers:
+  - Piyush Mehta <piyush.mehta@...inx.com>
+
+properties:
+  compatible:
+    const: microchip,usb2244
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      The phandle and specifier for the GPIO that controls the RESET line of
+      flash media controller.
+
+required:
+  - compatible
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    usb0 {
+        usbsd {
+            compatible = "microchip,usb2244";
+            reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+        };
+    };
+
+...
-- 
2.7.4