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>
2026-04-18 14:53:58 -04:00 · 2021-12-07 16:37:16 -08:00
parent 7c41161b51
commit a6564a5538
3 changed files with 105 additions and 84 deletions
--- a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
@@ -0,0 +1,104 @@
+# 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>;
+    };