1/*
2 * Allwinner A31 SoCs special pins pinctrl driver.
3 *
4 * Copyright (C) 2014 Boris Brezillon
5 * Boris Brezillon <boris.brezillon@free-electrons.com>
6 *
7 * Copyright (C) 2014 Maxime Ripard
8 * Maxime Ripard <maxime.ripard@free-electrons.com>
9 *
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2.  This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
13 */
14
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/of.h>
18#include <linux/of_device.h>
19#include <linux/pinctrl/pinctrl.h>
20#include <linux/reset.h>
21
22#include "pinctrl-sunxi.h"
23
24static const struct sunxi_desc_pin sun6i_a31_r_pins[] = {
25	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
26		  SUNXI_FUNCTION(0x0, "gpio_in"),
27		  SUNXI_FUNCTION(0x1, "gpio_out"),
28		  SUNXI_FUNCTION(0x2, "s_twi"),		/* SCK */
29		  SUNXI_FUNCTION(0x3, "s_p2wi")),	/* SCK */
30	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
31		  SUNXI_FUNCTION(0x0, "gpio_in"),
32		  SUNXI_FUNCTION(0x1, "gpio_out"),
33		  SUNXI_FUNCTION(0x2, "s_twi"),		/* SDA */
34		  SUNXI_FUNCTION(0x3, "s_p2wi")),	/* SDA */
35	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2),
36		  SUNXI_FUNCTION(0x0, "gpio_in"),
37		  SUNXI_FUNCTION(0x1, "gpio_out"),
38		  SUNXI_FUNCTION(0x2, "s_uart")),	/* TX */
39	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3),
40		  SUNXI_FUNCTION(0x0, "gpio_in"),
41		  SUNXI_FUNCTION(0x1, "gpio_out"),
42		  SUNXI_FUNCTION(0x2, "s_uart")),	/* RX */
43	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4),
44		  SUNXI_FUNCTION(0x0, "gpio_in"),
45		  SUNXI_FUNCTION(0x1, "gpio_out"),
46		  SUNXI_FUNCTION(0x2, "s_ir")),		/* RX */
47	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5),
48		  SUNXI_FUNCTION(0x0, "gpio_in"),
49		  SUNXI_FUNCTION(0x1, "gpio_out"),
50		  SUNXI_FUNCTION(0x3, "s_jtag")),	/* MS */
51	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6),
52		  SUNXI_FUNCTION(0x0, "gpio_in"),
53		  SUNXI_FUNCTION(0x1, "gpio_out"),
54		  SUNXI_FUNCTION(0x3, "s_jtag")),	/* CK */
55	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7),
56		  SUNXI_FUNCTION(0x0, "gpio_in"),
57		  SUNXI_FUNCTION(0x1, "gpio_out"),
58		  SUNXI_FUNCTION(0x3, "s_jtag")),	/* DO */
59	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8),
60		  SUNXI_FUNCTION(0x0, "gpio_in"),
61		  SUNXI_FUNCTION(0x1, "gpio_out"),
62		  SUNXI_FUNCTION(0x3, "s_jtag")),	/* DI */
63	/* Hole */
64	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 0),
65		  SUNXI_FUNCTION(0x0, "gpio_in"),
66		  SUNXI_FUNCTION(0x1, "gpio_out")),
67	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 1),
68		  SUNXI_FUNCTION(0x0, "gpio_in"),
69		  SUNXI_FUNCTION(0x1, "gpio_out")),
70	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 2),
71		  SUNXI_FUNCTION(0x0, "gpio_in"),
72		  SUNXI_FUNCTION(0x1, "gpio_out"),
73		  SUNXI_FUNCTION(0x3, "1wire")),
74	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 3),
75		  SUNXI_FUNCTION(0x0, "gpio_in"),
76		  SUNXI_FUNCTION(0x1, "gpio_out")),
77	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 4),
78		  SUNXI_FUNCTION(0x0, "gpio_in"),
79		  SUNXI_FUNCTION(0x1, "gpio_out")),
80	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 5),
81		  SUNXI_FUNCTION(0x0, "gpio_in"),
82		  SUNXI_FUNCTION(0x1, "gpio_out")),
83	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 6),
84		  SUNXI_FUNCTION(0x0, "gpio_in"),
85		  SUNXI_FUNCTION(0x1, "gpio_out")),
86	SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 7),
87		  SUNXI_FUNCTION(0x0, "gpio_in"),
88		  SUNXI_FUNCTION(0x1, "gpio_out"),
89		  SUNXI_FUNCTION(0x3, "rtc")),		/* CLKO */
90};
91
92static const struct sunxi_pinctrl_desc sun6i_a31_r_pinctrl_data = {
93	.pins = sun6i_a31_r_pins,
94	.npins = ARRAY_SIZE(sun6i_a31_r_pins),
95	.pin_base = PL_BASE,
96	.irq_banks = 2,
97};
98
99static int sun6i_a31_r_pinctrl_probe(struct platform_device *pdev)
100{
101	struct reset_control *rstc;
102	int ret;
103
104	rstc = devm_reset_control_get(&pdev->dev, NULL);
105	if (IS_ERR(rstc)) {
106		dev_err(&pdev->dev, "Reset controller missing\n");
107		return PTR_ERR(rstc);
108	}
109
110	ret = reset_control_deassert(rstc);
111	if (ret)
112		return ret;
113
114	ret = sunxi_pinctrl_init(pdev,
115				 &sun6i_a31_r_pinctrl_data);
116
117	if (ret)
118		reset_control_assert(rstc);
119
120	return ret;
121}
122
123static const struct of_device_id sun6i_a31_r_pinctrl_match[] = {
124	{ .compatible = "allwinner,sun6i-a31-r-pinctrl", },
125	{}
126};
127MODULE_DEVICE_TABLE(of, sun6i_a31_r_pinctrl_match);
128
129static struct platform_driver sun6i_a31_r_pinctrl_driver = {
130	.probe	= sun6i_a31_r_pinctrl_probe,
131	.driver	= {
132		.name		= "sun6i-a31-r-pinctrl",
133		.of_match_table	= sun6i_a31_r_pinctrl_match,
134	},
135};
136module_platform_driver(sun6i_a31_r_pinctrl_driver);
137
138MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com");
139MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");
140MODULE_DESCRIPTION("Allwinner A31 R_PIO pinctrl driver");
141MODULE_LICENSE("GPL");
142