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Message-Id: <20231229074508.2709093-2-JJLIU0@nuvoton.com>
Date: Fri, 29 Dec 2023 15:45:06 +0800
From: jim.t90615@...il.com
To: JJLIU0@...oton.com,
KWLIU@...oton.com,
jim.t90615@...il.com,
linus.walleij@...aro.org,
brgl@...ev.pl,
andy@...nel.org,
robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org,
conor+dt@...nel.org
Cc: linux-gpio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
openbmc@...ts.ozlabs.org,
Rob Herring <robh@...nel.org>,
Paul Menzel <pmenzel@...gen.mpg.de>
Subject: [PATCH v10 1/3] dt-bindings: gpio: add NPCM sgpio driver bindings
From: Jim Liu <JJLIU0@...oton.com>
Add dt-bindings document for the Nuvoton NPCM7xx sgpio driver
Signed-off-by: Jim Liu <JJLIU0@...oton.com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Paul Menzel <pmenzel@...gen.mpg.de>
---
Changes for v10:
- modify error words
Changes for v9:
- no changed
Changes for v8:
- no changed
---
.../bindings/gpio/nuvoton,sgpio.yaml | 87 +++++++++++++++++++
1 file changed, 87 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..9e32e54aeb24
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml
@@ -0,0 +1,87 @@
+# 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 and detailed
+ information is in the NPCM7XX/8XX SERIAL I/O EXPANSION INTERFACE section.
+ Nuvoton NPCM7xx SGPIO module is combines a serial to parallel IC (HC595)
+ and a parallel to serial IC (HC165).
+ Clock is a division of the APB3 clock.
+ This interface has 4 pins (D_out , D_in, S_CLK, LDSH).
+ NPCM7xx/NPCM8xx have two sgpio modules. Each module can support up
+ to 64 output pins, and up to 64 input pins, the pin is only for GPI or GPO.
+ GPIO pins can be programmed to support the following options
+ - Support interrupt option for each input port and various interrupt
+ sensitivity options (level-high, level-low, edge-high, edge-low)
+ - ngpios is number of nuvoton,input-ngpios GPIO lines and nuvoton,output-ngpios GPIO lines.
+ nuvoton,input-ngpios GPIO lines is only for GPI.
+ nuvoton,output-ngpios GPIO lines is only for GPO.
+
+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
+
+ nuvoton,input-ngpios:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The numbers of GPIO's exposed. GPIO lines are only for GPI.
+ minimum: 0
+ maximum: 64
+
+ nuvoton,output-ngpios:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The numbers of GPIO's exposed. GPIO lines are only for GPO.
+ minimum: 0
+ maximum: 64
+
+required:
+ - compatible
+ - reg
+ - gpio-controller
+ - '#gpio-cells'
+ - interrupts
+ - nuvoton,input-ngpios
+ - nuvoton,output-ngpios
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ gpio8: gpio@...000 {
+ compatible = "nuvoton,npcm750-sgpio";
+ reg = <0x101000 0x200>;
+ clocks = <&clk NPCM7XX_CLK_APB3>;
+ interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ nuvoton,input-ngpios = <64>;
+ nuvoton,output-ngpios = <64>;
+ };
--
2.25.1
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