dt-bindings: gpio: Convert Broadcom STB GPIO to YAML

Convert the Broadcom STB GPIO Device Tree binding to YAML to help with
validation.

Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20211208003727.3596577-6-f.fainelli@gmail.com


Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt

-Broadcom STB "UPG GIO" GPIO controller
-
-The controller's registers are organized as sets of eight 32-bit
-registers with each set controlling a bank of up to 32 pins.  A single
-interrupt is shared for all of the banks handled by the controller.
-
-Required properties:
-
-- compatible:
-    Must be "brcm,brcmstb-gpio"
-
-- reg:
-    Define the base and range of the I/O address space containing
-    the brcmstb GPIO controller registers
-
-- #gpio-cells:
-    Should be <2>.  The first cell is the pin number (within the controller's
-    pin space), and the second is used for the following:
-    bit[0]: polarity (0 for active-high, 1 for active-low)
-
-- gpio-controller:
-    Specifies that the node is a GPIO controller.
-
-- brcm,gpio-bank-widths:
-    Number of GPIO lines for each bank.  Number of elements must
-    correspond to number of banks suggested by the 'reg' property.
-
-Optional properties:
-
-- interrupts:
-    The interrupt shared by all GPIO lines for this controller.
-
-- interrupts-extended:
-    Alternate form of specifying interrupts and parents that allows for
-    multiple parents.  This takes precedence over 'interrupts' and
-    'interrupt-parent'.  Wakeup-capable GPIO controllers often route their
-    wakeup interrupt lines through a different interrupt controller than the
-    primary interrupt line, making this property necessary.
-
-- #interrupt-cells:
-    Should be <2>.  The first cell is the GPIO number, the second should specify
-    flags.  The following subset of flags is supported:
-    - bits[3:0] trigger type and level flags
-        1 = low-to-high edge triggered
-        2 = high-to-low edge triggered
-        4 = active high level-sensitive
-        8 = active low level-sensitive
-      Valid combinations are 1, 2, 3, 4, 8.
-    See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
-
-- interrupt-controller:
-    Marks the device node as an interrupt controller
-
-- wakeup-source:
-    GPIOs for this controller can be used as a wakeup source
-
-Example:
-	upg_gio: gpio@f040a700 {
-		#gpio-cells = <2>;
-		#interrupt-cells = <2>;
-		compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
-		gpio-controller;
-		interrupt-controller;
-		reg = <0xf040a700 0x80>;
-		interrupt-parent = <&irq0_intc>;
-		interrupts = <0x6>;
-		brcm,gpio-bank-widths = <32 32 32 24>;
-	};
-
-	upg_gio_aon: gpio@f04172c0 {
-		#gpio-cells = <2>;
-		#interrupt-cells = <2>;
-		compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
-		gpio-controller;
-		interrupt-controller;
-		reg = <0xf04172c0 0x40>;
-		interrupt-parent = <&irq0_aon_intc>;
-		interrupts = <0x6>;
-		interrupts-extended = <&irq0_aon_intc 0x6>,
-			<&aon_pm_l2_intc 0x5>;
-		wakeup-source;
-		brcm,gpio-bank-widths = <18 4>;
-	};

Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/brcm,brcmstb-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom STB "UPG GIO" GPIO controller
+
+description: >
+  The controller's registers are organized as sets of eight 32-bit
+  registers with each set controlling a bank of up to 32 pins.  A single
+  interrupt is shared for all of the banks handled by the controller.
+
+maintainers:
+  - Doug Berger <opendmb@gmail.com>
+  - Florian Fainelli <f.fainelli@gmail.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,bcm7445-gpio
+      - const: brcm,brcmstb-gpio
+
+  reg:
+    maxItems: 1
+    description: >
+      Define the base and range of the I/O address space containing
+      the brcmstb GPIO controller registers
+
+  "#gpio-cells":
+    const: 2
+    description: >
+      The first cell is the pin number (within the controller's
+      pin space), and the second is used for the following:
+      bit[0]: polarity (0 for active-high, 1 for active-low)
+
+  gpio-controller: true
+
+  brcm,gpio-bank-widths:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: >
+      Number of GPIO lines for each bank.  Number of elements must
+      correspond to number of banks suggested by the 'reg' property.
+
+  interrupts:
+    maxItems: 1
+    description: >
+      The interrupt shared by all GPIO lines for this controller.
+
+  "#interrupt-cells":
+    const: 2
+    description: |
+      The first cell is the GPIO number, the second should specify
+      flags.  The following subset of flags is supported:
+      - bits[3:0] trigger type and level flags
+        1 = low-to-high edge triggered
+        2 = high-to-low edge triggered
+        4 = active high level-sensitive
+        8 = active low level-sensitive
+      Valid combinations are 1, 2, 3, 4, 8.
+
+  interrupt-controller: true
+
+  wakeup-source:
+    type: boolean
+    description: >
+      GPIOs for this controller can be used as a wakeup source
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+  - "brcm,gpio-bank-widths"
+
+additionalProperties: false
+
+examples:
+  - |
+    upg_gio: gpio@f040a700 {
+        #gpio-cells = <2>;
+        #interrupt-cells = <2>;
+        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
+        gpio-controller;
+        interrupt-controller;
+        reg = <0xf040a700 0x80>;
+        interrupt-parent = <&irq0_intc>;
+        interrupts = <0x6>;
+        brcm,gpio-bank-widths = <32 32 32 24>;
+    };
+
+    upg_gio_aon: gpio@f04172c0 {
+        #gpio-cells = <2>;
+        #interrupt-cells = <2>;
+        compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
+        gpio-controller;
+        interrupt-controller;
+        reg = <0xf04172c0 0x40>;
+        interrupt-parent = <&irq0_aon_intc>;
+        interrupts = <0x6>;
+        wakeup-source;
+        brcm,gpio-bank-widths = <18 4>;
+    };

MAINTAINERS

@@ -3761,7 +3761,7 @@ BROADCOM BRCMSTB GPIO DRIVER
 M:	Gregory Fong <gregory.0xf0@gmail.com>
 L:	bcm-kernel-feedback-list@broadcom.com
 S:	Supported
-F:	Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
+F:	Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
 F:	drivers/gpio/gpio-brcmstb.c
 BROADCOM BRCMSTB I2C DRIVER