linux-kernel - [PATCH v5] dt-bindings: gpio: brcm: Add bindings for xgs-iproc

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Date:   Tue, 29 Oct 2019 09:05:55 +1300
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        robh+dt@...nel.org, mark.rutland@....com, rjui@...adcom.com,
        sbranden@...adcom.com, bcm-kernel-feedback-list@...adcom.com
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v5] dt-bindings: gpio: brcm: Add bindings for xgs-iproc

This GPIO controller is present on a number of Broadcom switch ASICs
with integrated SoCs. It is similar to the nsp-gpio and iproc-gpio
blocks but different enough to require a separate driver.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
Reviewed-by: Rob Herring <robh@...nel.org>
---

Notes:
    Changes in v5:
    - correct $id line following rename
    - add reviewed-by from Rob
    
    Changes in v4:
    - rename brcm,xgs-iproc.yaml -> brcm,xgs-iproc-gpio.yaml as suggested
    
    Changes in v3:
    - incorporate review comments from Rob and Bart
    
    Changes in v2:
    - Document as DT schema
    - Include ngpios, #gpio-cells and gpio-controller properties

 .../bindings/gpio/brcm,xgs-iproc-gpio.yaml    | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,xgs-iproc-gpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc-gpio.yaml b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc-gpio.yaml
new file mode 100644
index 000000000000..64e279a4bc10
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc-gpio.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/brcm,xgs-iproc-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom XGS iProc GPIO controller
+
+maintainers:
+  - Chris Packham <chris.packham@...iedtelesis.co.nz>
+
+description: |
+  This controller is the Chip Common A GPIO present on a number of Broadcom
+  switch ASICs with integrated SoCs.
+
+properties:
+  compatible:
+    const: brcm,iproc-gpio-cca
+
+  reg:
+    items:
+      - description: the I/O address containing the GPIO controller
+                     registers.
+      - description: the I/O address containing the Chip Common A interrupt
+                     registers.
+
+  gpio-controller: true
+
+  '#gpio-cells':
+      const: 2
+
+  ngpios:
+    minimum: 0
+    maximum: 32
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - "#gpio-cells"
+  - gpio-controller
+
+dependencies:
+  interrupt-controller: [ interrupts ]
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    gpio@...00060 {
+        compatible = "brcm,iproc-gpio-cca";
+        #gpio-cells = <2>;
+        reg = <0x18000060 0x50>,
+              <0x18000000 0x50>;
+        ngpios = <12>;
+        gpio-controller;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+        interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
+    };
+
+
+...
-- 
2.23.0