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Message-Id: <20240825-02-k1-pinctrl-v2-1-ddd38a345d12@gentoo.org>
Date: Sun, 25 Aug 2024 13:10:02 +0000
From: Yixun Lan <dlan@...too.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>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Conor Dooley <conor@...nel.org>
Cc: Yangyu Chen <cyy@...self.name>, Jesse Taube <jesse@...osinc.com>,
Jisheng Zhang <jszhang@...nel.org>, Inochi Amaoto <inochiama@...look.com>,
Icenowy Zheng <uwu@...nowy.me>, Meng Zhang <zhangmeng.kevin@...cemit.com>,
Meng Zhang <kevin.z.m@...mail.com>, devicetree@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org, Yixun Lan <dlan@...too.org>
Subject: [PATCH v2 1/4] dt-binding: pinctrl: spacemit: add documents for K1
SoC
Add dt-binding for the pinctrl driver of SpacemiT's K1 SoC.
Two vendor specific properties are introduced here, As the pinctrl
has dedicated slew rate enable control - bit[7], so we have
spacemit,slew-rate-{enable,disable} for this. For the same reason,
creating spacemit,strong-pull-up for the strong pull up control.
Signed-off-by: Yixun Lan <dlan@...too.org>
---
.../bindings/pinctrl/spacemit,k1-pinctrl.yaml | 134 +++++++++++++++++
include/dt-bindings/pinctrl/spacemit,k1-pinctrl.h | 161 +++++++++++++++++++++
2 files changed, 295 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
new file mode 100644
index 0000000000000..8adfc5ebbce37
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
@@ -0,0 +1,134 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/spacemit,k1-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 SoC Pin Controller
+
+maintainers:
+ - Yixun Lan <dlan@...too.org>
+
+properties:
+ compatible:
+ const: spacemit,k1-pinctrl
+
+ reg:
+ items:
+ - description: pinctrl io memory base
+
+patternProperties:
+ '-cfg$':
+ type: object
+ description: |
+ A pinctrl node should contain at least one subnode representing the
+ pinctrl groups available on the machine.
+
+ additionalProperties: false
+
+ patternProperties:
+ '-pins$':
+ type: object
+ description: |
+ Each subnode will list the pins it needs, and how they should
+ be configured, with regard to muxer configuration, bias, input
+ enable/disable, input schmitt trigger, slew-rate enable/disable,
+ slew-rate, drive strength, power source.
+ $ref: /schemas/pinctrl/pincfg-node.yaml
+
+ allOf:
+ - $ref: pincfg-node.yaml#
+ - $ref: pinmux-node.yaml#
+
+ properties:
+ pinmux:
+ description: |
+ The list of GPIOs and their mux settings that properties in the
+ node apply to. This should be set using the K1_PADCONF macro to
+ construct the value.
+ $ref: /schemas/pinctrl/pinmux-node.yaml#/properties/pinmux
+
+ bias-disable: true
+
+ bias-pull-up: true
+
+ bias-pull-down: true
+
+ drive-strength-microamp:
+ description: |
+ typical current when output high level, but in mA.
+ 1.8V output: 11, 21, 32, 42 (mA)
+ 3.3V output: 7, 10, 13, 16, 19, 23, 26, 29 (mA)
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ input-schmitt:
+ description: |
+ typical threshold for schmitt trigger.
+ 0: buffer mode
+ 1: trigger mode
+ 2, 3: trigger mode
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3]
+
+ power-source:
+ description: external power supplies at 1.8v or 3.3v.
+ enum: [ 1800, 3300 ]
+
+ slew-rate:
+ description: |
+ slew rate for output buffer
+ 0, 1: Slow speed
+ 2: Medium speed
+ 3: Fast speed
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3]
+
+ spacemit,slew-rate-enable:
+ description: enable slew rate.
+ type: boolean
+
+ spacemit,slew-rate-disable:
+ description: disable slew rate.
+ type: boolean
+
+ spacemit,strong-pull-up:
+ description: enable strong pull up.
+ type: boolean
+
+ required:
+ - pinmux
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/pinctrl/spacemit,k1-pinctrl.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ pinctrl@...1e000 {
+ compatible = "spacemit,k1-pinctrl";
+ reg = <0x0 0xd401e000 0x0 0x400>;
+ #pinctrl-cells = <2>;
+ #gpio-range-cells = <3>;
+
+ uart0_2_cfg: uart0-2-cfg {
+ uart0-2-pins {
+ pinmux = <K1_PADCONF(GPIO_68, 2)>,
+ <K1_PADCONF(GPIO_69, 2)>;
+ bias-pull-up;
+ drive-strength-microamp = <32>;
+ };
+ };
+ };
+ };
+
+...
diff --git a/include/dt-bindings/pinctrl/spacemit,k1-pinctrl.h b/include/dt-bindings/pinctrl/spacemit,k1-pinctrl.h
new file mode 100644
index 0000000000000..13ef4aa6c53a3
--- /dev/null
+++ b/include/dt-bindings/pinctrl/spacemit,k1-pinctrl.h
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+/*
+ * Copyright (c) 2022-2024 SpacemiT (Hangzhou) Technology Co. Ltd
+ * Copyright (c) 2024 Yixun Lan <dlan@...too.org>
+ *
+ */
+
+#ifndef _DT_BINDINGS_PINCTRL_K1_H
+#define _DT_BINDINGS_PINCTRL_K1_H
+
+#define PINMUX(pin, mux) \
+ (((pin) & 0xffff) | (((mux) & 0xff) << 16))
+
+/* pin offset */
+#define PINID(x) ((x) + 1)
+
+#define GPIO_INVAL 0
+#define GPIO_00 PINID(0)
+#define GPIO_01 PINID(1)
+#define GPIO_02 PINID(2)
+#define GPIO_03 PINID(3)
+#define GPIO_04 PINID(4)
+#define GPIO_05 PINID(5)
+#define GPIO_06 PINID(6)
+#define GPIO_07 PINID(7)
+#define GPIO_08 PINID(8)
+#define GPIO_09 PINID(9)
+#define GPIO_10 PINID(10)
+#define GPIO_11 PINID(11)
+#define GPIO_12 PINID(12)
+#define GPIO_13 PINID(13)
+#define GPIO_14 PINID(14)
+#define GPIO_15 PINID(15)
+#define GPIO_16 PINID(16)
+#define GPIO_17 PINID(17)
+#define GPIO_18 PINID(18)
+#define GPIO_19 PINID(19)
+#define GPIO_20 PINID(20)
+#define GPIO_21 PINID(21)
+#define GPIO_22 PINID(22)
+#define GPIO_23 PINID(23)
+#define GPIO_24 PINID(24)
+#define GPIO_25 PINID(25)
+#define GPIO_26 PINID(26)
+#define GPIO_27 PINID(27)
+#define GPIO_28 PINID(28)
+#define GPIO_29 PINID(29)
+#define GPIO_30 PINID(30)
+#define GPIO_31 PINID(31)
+
+#define GPIO_32 PINID(32)
+#define GPIO_33 PINID(33)
+#define GPIO_34 PINID(34)
+#define GPIO_35 PINID(35)
+#define GPIO_36 PINID(36)
+#define GPIO_37 PINID(37)
+#define GPIO_38 PINID(38)
+#define GPIO_39 PINID(39)
+#define GPIO_40 PINID(40)
+#define GPIO_41 PINID(41)
+#define GPIO_42 PINID(42)
+#define GPIO_43 PINID(43)
+#define GPIO_44 PINID(44)
+#define GPIO_45 PINID(45)
+#define GPIO_46 PINID(46)
+#define GPIO_47 PINID(47)
+#define GPIO_48 PINID(48)
+#define GPIO_49 PINID(49)
+#define GPIO_50 PINID(50)
+#define GPIO_51 PINID(51)
+#define GPIO_52 PINID(52)
+#define GPIO_53 PINID(53)
+#define GPIO_54 PINID(54)
+#define GPIO_55 PINID(55)
+#define GPIO_56 PINID(56)
+#define GPIO_57 PINID(57)
+#define GPIO_58 PINID(58)
+#define GPIO_59 PINID(59)
+#define GPIO_60 PINID(60)
+#define GPIO_61 PINID(61)
+#define GPIO_62 PINID(62)
+#define GPIO_63 PINID(63)
+
+#define GPIO_64 PINID(64)
+#define GPIO_65 PINID(65)
+#define GPIO_66 PINID(66)
+#define GPIO_67 PINID(67)
+#define GPIO_68 PINID(68)
+#define GPIO_69 PINID(69)
+#define GPIO_70 PINID(70)
+#define GPIO_71 PINID(71)
+#define GPIO_72 PINID(72)
+#define GPIO_73 PINID(73)
+#define GPIO_74 PINID(74)
+#define GPIO_75 PINID(75)
+#define GPIO_76 PINID(76)
+#define GPIO_77 PINID(77)
+#define GPIO_78 PINID(78)
+#define GPIO_79 PINID(79)
+#define GPIO_80 PINID(80)
+#define GPIO_81 PINID(81)
+#define GPIO_82 PINID(82)
+#define GPIO_83 PINID(83)
+#define GPIO_84 PINID(84)
+#define GPIO_85 PINID(85)
+
+#define GPIO_101 PINID(89)
+#define GPIO_100 PINID(90)
+#define GPIO_99 PINID(91)
+#define GPIO_98 PINID(92)
+#define GPIO_103 PINID(93)
+#define GPIO_102 PINID(94)
+
+#define GPIO_104 PINID(109)
+#define GPIO_105 PINID(110)
+#define GPIO_106 PINID(111)
+#define GPIO_107 PINID(112)
+#define GPIO_108 PINID(113)
+#define GPIO_109 PINID(114)
+#define GPIO_110 PINID(115)
+
+#define GPIO_93 PINID(116)
+#define GPIO_94 PINID(117)
+#define GPIO_95 PINID(118)
+#define GPIO_96 PINID(119)
+#define GPIO_97 PINID(120)
+
+#define GPIO_86 PINID(122)
+#define GPIO_87 PINID(123)
+#define GPIO_88 PINID(124)
+#define GPIO_89 PINID(125)
+#define GPIO_90 PINID(126)
+#define GPIO_91 PINID(127)
+#define GPIO_92 PINID(128)
+
+#define GPIO_111 PINID(130)
+#define GPIO_112 PINID(131)
+#define GPIO_113 PINID(132)
+#define GPIO_114 PINID(133)
+#define GPIO_115 PINID(134)
+#define GPIO_116 PINID(135)
+#define GPIO_117 PINID(136)
+#define GPIO_118 PINID(137)
+#define GPIO_119 PINID(138)
+#define GPIO_120 PINID(139)
+#define GPIO_121 PINID(140)
+#define GPIO_122 PINID(141)
+#define GPIO_123 PINID(142)
+#define GPIO_124 PINID(143)
+#define GPIO_125 PINID(144)
+#define GPIO_126 PINID(145)
+#define GPIO_127 PINID(146)
+
+#define SLEW_RATE_SLOW0 0
+#define SLEW_RATE_SLOW1 1
+#define SLEW_RATE_MEDIUM 2
+#define SLEW_RATE_FAST 3
+
+#define K1_PADCONF(pin, func) (((pin) << 16) | (func))
+
+#endif /* _DT_BINDINGS_PINCTRL_K1_H */
--
2.45.2
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