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Message-ID: <20250714202821.3011099-1-robh@kernel.org>
Date: Mon, 14 Jul 2025 15:28:20 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Khuong Dinh <khuong@...amperecomputing.com>
Cc: linux-gpio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: gpio: Convert apm,xgene-gpio-sb to DT schema
Convert APM X-Gene Standby GPIO binding to DT schema format. It's a
straight forward conversion.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../bindings/gpio/apm,xgene-gpio-sb.yaml | 94 +++++++++++++++++++
.../bindings/gpio/gpio-xgene-sb.txt | 64 -------------
2 files changed, 94 insertions(+), 64 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/apm,xgene-gpio-sb.yaml
delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
diff --git a/Documentation/devicetree/bindings/gpio/apm,xgene-gpio-sb.yaml b/Documentation/devicetree/bindings/gpio/apm,xgene-gpio-sb.yaml
new file mode 100644
index 000000000000..d205dd7b492c
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/apm,xgene-gpio-sb.yaml
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/apm,xgene-gpio-sb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: APM X-Gene Standby GPIO controller
+
+maintainers:
+ - Khuong Dinh <khuong@...amperecomputing.com>
+
+description: |
+ This is a gpio controller in the standby domain. It also supports interrupt in
+ some particular pins which are sourced to its parent interrupt controller
+ as diagram below:
+ +-----------------+
+ | X-Gene standby |
+ | GPIO controller +------ GPIO_0
+ +------------+ | | ...
+ | Parent IRQ | EXT_INT_0 | +------ GPIO_8/EXT_INT_0
+ | controller | (SPI40) | | ...
+ | (GICv2) +--------------+ +------ GPIO_[N+8]/EXT_INT_N
+ | | ... | |
+ | | EXT_INT_N | +------ GPIO_[N+9]
+ | | (SPI[40 + N])| | ...
+ | +--------------+ +------ GPIO_MAX
+ +------------+ +-----------------+
+
+properties:
+ compatible:
+ const: apm,xgene-gpio-sb
+
+ reg:
+ maxItems: 1
+
+ '#gpio-cells':
+ const: 2
+
+ gpio-controller: true
+
+ interrupts:
+ description:
+ List of interrupt specifiers for EXT_INT_0 through EXT_INT_N. The first
+ entry must correspond to EXT_INT_0.
+
+ '#interrupt-cells':
+ const: 2
+ description:
+ First cell selects EXT_INT_N (0-N), second cell specifies flags
+
+ interrupt-controller: true
+
+ apm,nr-gpios:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Number of GPIO pins
+
+ apm,nr-irqs:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Number of interrupt pins
+
+ apm,irq-start:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Lowest GPIO pin supporting interrupts
+
+required:
+ - compatible
+ - reg
+ - '#gpio-cells'
+ - gpio-controller
+ - interrupts
+ - '#interrupt-cells'
+ - interrupt-controller
+
+additionalProperties: false
+
+examples:
+ - |
+ gpio@...01000 {
+ compatible = "apm,xgene-gpio-sb";
+ reg = <0x17001000 0x400>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupts = <0x0 0x28 0x1>,
+ <0x0 0x29 0x1>,
+ <0x0 0x2a 0x1>,
+ <0x0 0x2b 0x1>,
+ <0x0 0x2c 0x1>,
+ <0x0 0x2d 0x1>;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ apm,nr-gpios = <22>;
+ apm,nr-irqs = <6>;
+ apm,irq-start = <8>;
+ };
diff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
deleted file mode 100644
index 7ddf292db144..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
+++ /dev/null
@@ -1,64 +0,0 @@
-APM X-Gene Standby GPIO controller bindings
-
-This is a gpio controller in the standby domain. It also supports interrupt in
-some particular pins which are sourced to its parent interrupt controller
-as diagram below:
- +-----------------+
- | X-Gene standby |
- | GPIO controller +------ GPIO_0
-+------------+ | | ...
-| Parent IRQ | EXT_INT_0 | +------ GPIO_8/EXT_INT_0
-| controller | (SPI40) | | ...
-| (GICv2) +--------------+ +------ GPIO_[N+8]/EXT_INT_N
-| | ... | |
-| | EXT_INT_N | +------ GPIO_[N+9]
-| | (SPI[40 + N])| | ...
-| +--------------+ +------ GPIO_MAX
-+------------+ +-----------------+
-
-Required properties:
-- compatible: "apm,xgene-gpio-sb" for the X-Gene Standby GPIO controller
-- reg: Physical base address and size of the controller's registers
-- #gpio-cells: Should be two.
- - first cell is the pin number
- - second cell is used to specify the gpio polarity:
- 0 = active high
- 1 = active low
-- gpio-controller: Marks the device node as a GPIO controller.
-- interrupts: The EXT_INT_0 parent interrupt resource must be listed first.
-- interrupt-cells: Should be two.
- - first cell is 0-N corresponding for EXT_INT_0 to EXT_INT_N.
- - second cell is used to specify flags.
-- interrupt-controller: Marks the device node as an interrupt controller.
-- apm,nr-gpios: Optional, specify number of gpios pin.
-- apm,nr-irqs: Optional, specify number of interrupt pins.
-- apm,irq-start: Optional, specify lowest gpio pin support interrupt.
-
-Example:
- sbgpio: gpio@...01000{
- compatible = "apm,xgene-gpio-sb";
- reg = <0x0 0x17001000 0x0 0x400>;
- #gpio-cells = <2>;
- gpio-controller;
- interrupts = <0x0 0x28 0x1>,
- <0x0 0x29 0x1>,
- <0x0 0x2a 0x1>,
- <0x0 0x2b 0x1>,
- <0x0 0x2c 0x1>,
- <0x0 0x2d 0x1>;
- interrupt-parent = <&gic>;
- #interrupt-cells = <2>;
- interrupt-controller;
- apm,nr-gpios = <22>;
- apm,nr-irqs = <6>;
- apm,irq-start = <8>;
- };
-
- testuser {
- compatible = "example,testuser";
- /* Use the GPIO_13/EXT_INT_5 line as an active high triggered
- * level interrupt
- */
- interrupts = <5 4>;
- interrupt-parent = <&sbgpio>;
- };
--
2.47.2
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