linux-kernel - [PATCH v1 2/3] dt-bindings: support Nuvoton sgpio

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Date:   Fri, 11 Mar 2022 14:09:35 +0800
From:   jimliu2 <jim.t90615@...il.com>
To:     JJLIU0@...oton.com, KWLIU@...oton.com, linus.walleij@...aro.org,
        brgl@...ev.pl, robh+dt@...nel.org, avifishman70@...il.com,
        tmaimon77@...il.com, tali.perry1@...il.com, venture@...gle.com,
        yuenn@...gle.com, benjaminfair@...gle.com, jim.t90615@...il.com,
        CTCCHIEN@...oton.com
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org
Subject: [PATCH v1 2/3] dt-bindings: support Nuvoton sgpio

Add nuvoton sgpio yaml in dt-bindings

Signed-off-by: jimliu2 <JJLIU0@...oton.com>
---
 .../bindings/gpio/nuvoton,sgpio.yaml          | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml b/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml
new file mode 100644
index 000000000000..8766e1fa4528
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/nuvoton,sgpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton SGPIO controller
+
+maintainers:
+  - Jim LIU <JJLIU0@...oton.com>
+
+description:
+  This SGPIO controller is for NUVOTON NPCM7xx and NPCM8xx SoC,
+  NPCM7xx/NPCM8xx have two sgpio module each module can support up
+  to 64 output pins,and up to 64 input pin.
+  GPIO pins can be programmed to support the following options
+  - Support interrupt option for each input port and various interrupt
+    sensitivity option (level-high, level-low, edge-high, edge-low)
+  - Directly connected to APB bus and its shift clock is from APB bus clock
+    divided by a programmable value.
+  - ngpios is number of nin_gpios GPIO lines and nout_gpios GPIO lines.
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-sgpio
+      - nuvoton,npcm845-sgpio
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  nin_gpios: true
+
+  nout_gpios: true
+
+  bus-frequency: true
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - '#gpio-cells'
+  - interrupts
+  - nin_gpios
+  - nout_gpios
+  - clocks
+  - bus-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    sgpio1: sgpio@...000 {
+        compatible = "nuvoton,npcm750-sgpio";
+        gpio-controller;
+        #gpio-cells = <2>;
+        interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+        reg = <0x101000 0x200>;
+        clocks = <&clk NPCM7XX_CLK_APB3>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&iox1_pins>;
+        nin_gpios = <64>;
+        nout_gpios = <64>;
+        bus-frequency = <16000000>;
+    };
-- 
2.17.1