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Message-Id: <20250115-amlogic-pinctrl-v3-1-2b8536457aba@amlogic.com>
Date: Wed, 15 Jan 2025 14:41:59 +0800
From: Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org, Xianwei Zhao <xianwei.zhao@...ogic.com>
Subject: [PATCH v3 1/5] dt-bindings: pinctrl: Add support for Amlogic SoCs
From: Xianwei Zhao <xianwei.zhao@...ogic.com>
Add the dt-bindings for Amlogic pin controller, and add a new
dt-binding header file which document the GPIO bank names of
all Amlogic subsequent SoCs.
Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
---
.../bindings/pinctrl/amlogic,pinctrl-a4.yaml | 132 +++++++++++++++++++++
include/dt-bindings/pinctrl/amlogic,pinctrl.h | 46 +++++++
2 files changed, 178 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml
new file mode 100644
index 000000000000..bc2764549471
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml
@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/amlogic,pinctrl-a4.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic pinmux controller
+
+maintainers:
+ - Xianwei Zhao <xianwei.zhao@...ogic.com>
+
+allOf:
+ - $ref: pinctrl.yaml#
+
+properties:
+ compatible:
+ const: amlogic,pinctrl-a4
+
+ "#address-cells":
+ const: 2
+
+ "#size-cells":
+ const: 2
+
+ ranges: true
+
+required:
+ - compatible
+ - "#address-cells"
+ - "#size-cells"
+
+patternProperties:
+ "^gpio@[0-9a-f]+$":
+ type: object
+
+ properties:
+ reg:
+ minItems: 1
+ items:
+ - description: pin config register
+ - description: pin mux setting register (some special pin fixed function)
+ - description: pin drive strength register (optionanl)
+
+ reg-names:
+ minItems: 1
+ items:
+ - const: gpio
+ - const: mux
+ - const: ds
+
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+
+ gpio-ranges:
+ maxItems: 1
+
+ bank-number:
+ description: |
+ bank-number are provided by the pin controller header file at:
+ <include/dt-bindings/pinctrl/amlogic,pinctrl.h>
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ required:
+ - reg
+ - reg-names
+ - gpio-controller
+ - "#gpio-cells"
+ - gpio-ranges
+ - bank-number
+
+ additionalProperties: false
+
+ "^func-[0-9a-z-]+$":
+ type: object
+ patternProperties:
+ "^group-[0-9a-z-]+$":
+ type: object
+ allOf:
+ - $ref: /schemas/pinctrl/pincfg-node.yaml
+ - $ref: /schemas/pinctrl/pinmux-node.yaml
+ additionalProperties: false
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/pinctrl/amlogic,pinctrl.h>
+ apb {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ periphs_pinctrl: pinctrl {
+ compatible = "amlogic,pinctrl-a4";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ gpio@14 {
+ reg = <0 0x14 0 0x10>,
+ <0 0x14 0 0x10>;
+ reg-names = "gpio", "mux";
+ gpio-controller;
+ #gpio-cells = <2>;
+ bank-number = <AMLOGIC_GPIO_B>;
+ gpio-ranges = <&periphs_pinctrl 0 8 10>;
+ };
+
+ func-uart-b {
+ group-default {
+ pinmux = <AML_PINMUX(AMLOGIC_GPIO_B, 1, 4)>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ };
+
+ group-pins1 {
+ pinmux = <AML_PINMUX(AMLOGIC_GPIO_B, 5, 2)>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ };
+ };
+
+ func-uart-c {
+ group-default {
+ pinmux = <AML_PINMUX(AMLOGIC_GPIO_B, 3, 1)>,
+ <AML_PINMUX(AMLOGIC_GPIO_B, 2, 1)>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ };
+ };
+ };
+ };
diff --git a/include/dt-bindings/pinctrl/amlogic,pinctrl.h b/include/dt-bindings/pinctrl/amlogic,pinctrl.h
new file mode 100644
index 000000000000..7d40aecc7147
--- /dev/null
+++ b/include/dt-bindings/pinctrl/amlogic,pinctrl.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR MIT) */
+/*
+ * Copyright (c) 2024 Amlogic, Inc. All rights reserved.
+ * Author: Xianwei Zhao <xianwei.zhao@...ogic.com>
+ */
+
+#ifndef _DT_BINDINGS_AMLOGIC_PINCTRL_H
+#define _DT_BINDINGS_AMLOGIC_PINCTRL_H
+/* Normal PIN bank */
+#define AMLOGIC_GPIO_A 0
+#define AMLOGIC_GPIO_B 1
+#define AMLOGIC_GPIO_C 2
+#define AMLOGIC_GPIO_D 3
+#define AMLOGIC_GPIO_E 4
+#define AMLOGIC_GPIO_F 5
+#define AMLOGIC_GPIO_G 6
+#define AMLOGIC_GPIO_H 7
+#define AMLOGIC_GPIO_I 8
+#define AMLOGIC_GPIO_J 9
+#define AMLOGIC_GPIO_K 10
+#define AMLOGIC_GPIO_L 11
+#define AMLOGIC_GPIO_M 12
+#define AMLOGIC_GPIO_N 13
+#define AMLOGIC_GPIO_O 14
+#define AMLOGIC_GPIO_P 15
+#define AMLOGIC_GPIO_Q 16
+#define AMLOGIC_GPIO_R 17
+#define AMLOGIC_GPIO_S 18
+#define AMLOGIC_GPIO_T 19
+#define AMLOGIC_GPIO_U 20
+#define AMLOGIC_GPIO_V 21
+#define AMLOGIC_GPIO_W 22
+#define AMLOGIC_GPIO_X 23
+#define AMLOGIC_GPIO_Y 24
+#define AMLOGIC_GPIO_Z 25
+
+/* Special PIN bank */
+#define AMLOGIC_GPIO_DV 26
+#define AMLOGIC_GPIO_AO 27
+#define AMLOGIC_GPIO_CC 28
+#define AMLOGIC_GPIO_TEST_N 29
+#define AMLOGIC_GPIO_ANALOG 30
+
+#define AML_PINMUX(bank, offset, mode) (((((bank) << 8) + (offset)) << 8) | (mode))
+
+#endif /* _DT_BINDINGS_AMLOGIC_PINCTRL_H */
--
2.37.1
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