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Message-Id: <20241211-amlogic-pinctrl-v1-1-410727335119@amlogic.com>
Date: Wed, 11 Dec 2024 14:47:49 +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>
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 RFC 1/3] 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 and
alternative func value of all Amlogic subsequent SoCs.
Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
---
.../bindings/pinctrl/amlogic,pinctrl.yaml | 150 +++++++++++++++++++++
include/dt-bindings/pinctrl/amlogic,pinctrl.h | 68 ++++++++++
2 files changed, 218 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl.yaml
new file mode 100644
index 000000000000..b0c2ae585d7d
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl.yaml
@@ -0,0 +1,150 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/amlogic,pinctrl.yaml#
+$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
+
+ reg:
+ minItems: 2
+
+ reg-names:
+ items:
+ - const: mux
+ - const: gpio
+
+ "#address-cells":
+ const: 2
+
+ "#size-cells":
+ const: 2
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - "#address-cells"
+ - "#size-cells"
+
+patternProperties:
+ "^gpio[a-z]":
+ type: object
+
+ properties:
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+
+ bank-name:
+ $ref: /schemas/types.yaml#/definitions/string
+
+ npins:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 32
+
+ bank-index:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 29
+
+ reg-mux-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ bit-mux-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ reg-gpio-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ required:
+ - gpio-controller
+ - "#gpio-cells"
+ - npins
+ - bank-index
+ - reg-mux-offset
+ - reg-gpio-offset
+ - bank-name
+
+ additionalProperties: false
+ unevaluatedProperties: false
+
+ "^func-[0-9a-z]":
+ type: object
+ additionalProperties:
+ type: object
+ allOf:
+ - $ref: pincfg-node.yaml#
+ - $ref: pinmux-node.yaml#
+
+additionalProperties: false
+
+examples:
+ - |
+ apb {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ periphs_pinctrl: pinctrl@...00 {
+ compatible = "amlogic,pinctrl";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ reg = <0x0 0x8e700 0x0 0x04>,
+ <0x0 0x8e704 0x0 0x60>;
+ reg-names = "mux", "gpio";
+
+ gpiob {
+ gpio-controller;
+ #gpio-cells = <2>;
+ npins = <10>;
+ bank-index = <1>;
+ reg-mux-offset = <0x14>;
+ bit-mux-offset = <0x14>;
+ reg-gpio-offset = <0x30>;
+ bank-name = "GPIOB";
+ };
+
+ gpioe {
+ gpio-controller;
+ #gpio-cells = <2>;
+ npins = <10>;
+ bank-index = <5>;
+ reg-mux-offset = <0x14>;
+ reg-gpio-offset = <0x30>;
+ bank-name = "GPIOE";
+ };
+
+ func-uart-b {
+ uart-b-default{
+ pinmux = <3>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ };
+
+ uart-c-default{
+ pinmux = <4>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ };
+ };
+
+ func-uart-c {
+ uart-c-default{
+ pinmux = <3>;
+ 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..03db0a730e8b
--- /dev/null
+++ b/include/dt-bindings/pinctrl/amlogic,pinctrl.h
@@ -0,0 +1,68 @@
+/* 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
+
+/* define PIN modes */
+#define AF0 0x0
+#define AF1 0x1
+#define AF2 0x2
+#define AF3 0x3
+#define AF4 0x4
+#define AF5 0x5
+#define AF6 0x6
+#define AF7 0x7
+#define AF8 0x8
+#define AF9 0x9
+#define AF10 0xa
+#define AF11 0xb
+#define AF12 0xc
+#define AF13 0xd
+#define AF14 0xe
+#define AF15 0xf
+
+#define AML_PIN_ALT_FUNC_MASK 0xf
+
+/* 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 AML_PINMUX(bank, offset, mode) (((((bank) << 8) + (offset)) << 8) | (mode))
+#define AML_PINMUX_TO_BANK(pinmux) (((pinmux) >> 16) & 0xff)
+#define AML_PINMUX_TO_OFFSET(pinmux) (((pinmux) >> 8) & 0xff)
+
+#endif /* _DT_BINDINGS_AMLOGIC_PINCTRL_H */
--
2.37.1
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