1 /*
2  * Allwinner A23 SoCs special pins pinctrl driver.
3  *
4  * Copyright (C) 2014 Chen-Yu Tsai
5  * Chen-Yu Tsai <wens@csie.org>
6  *
7  * Copyright (C) 2014 Boris Brezillon
8  * Boris Brezillon <boris.brezillon@free-electrons.com>
9  *
10  * Copyright (C) 2014 Maxime Ripard
11  * Maxime Ripard <maxime.ripard@free-electrons.com>
12  *
13  * This file is licensed under the terms of the GNU General Public
14  * License version 2.  This program is licensed "as is" without any
15  * warranty of any kind, whether express or implied.
16  */
17 
18 #include <linux/init.h>
19 #include <linux/platform_device.h>
20 #include <linux/of.h>
21 #include <linux/of_device.h>
22 #include <linux/pinctrl/pinctrl.h>
23 #include <linux/reset.h>
24 
25 #include "pinctrl-sunxi.h"
26 
27 static const struct sunxi_desc_pin sun8i_a23_r_pins[] = {
28 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
29 		  SUNXI_FUNCTION(0x0, "gpio_in"),
30 		  SUNXI_FUNCTION(0x1, "gpio_out"),
31 		  SUNXI_FUNCTION(0x2, "s_rsb"),		/* SCK */
32 		  SUNXI_FUNCTION(0x3, "s_i2c"),		/* SCK */
33 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 0)),	/* PL_EINT0 */
34 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
35 		  SUNXI_FUNCTION(0x0, "gpio_in"),
36 		  SUNXI_FUNCTION(0x1, "gpio_out"),
37 		  SUNXI_FUNCTION(0x2, "s_rsb"),		/* SDA */
38 		  SUNXI_FUNCTION(0x3, "s_i2c"),		/* SDA */
39 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 1)),	/* PL_EINT1 */
40 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2),
41 		  SUNXI_FUNCTION(0x0, "gpio_in"),
42 		  SUNXI_FUNCTION(0x1, "gpio_out"),
43 		  SUNXI_FUNCTION(0x2, "s_uart"),	/* TX */
44 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 2)),	/* PL_EINT2 */
45 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3),
46 		  SUNXI_FUNCTION(0x0, "gpio_in"),
47 		  SUNXI_FUNCTION(0x1, "gpio_out"),
48 		  SUNXI_FUNCTION(0x2, "s_uart"),	/* RX */
49 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 3)),	/* PL_EINT3 */
50 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4),
51 		  SUNXI_FUNCTION(0x0, "gpio_in"),
52 		  SUNXI_FUNCTION(0x1, "gpio_out"),
53 		  SUNXI_FUNCTION(0x3, "s_jtag"),	/* MS */
54 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 4)),	/* PL_EINT4 */
55 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5),
56 		  SUNXI_FUNCTION(0x0, "gpio_in"),
57 		  SUNXI_FUNCTION(0x1, "gpio_out"),
58 		  SUNXI_FUNCTION(0x3, "s_jtag"),	/* CK */
59 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 5)),	/* PL_EINT5 */
60 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6),
61 		  SUNXI_FUNCTION(0x0, "gpio_in"),
62 		  SUNXI_FUNCTION(0x1, "gpio_out"),
63 		  SUNXI_FUNCTION(0x3, "s_jtag"),	/* DO */
64 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 6)),	/* PL_EINT6 */
65 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7),
66 		  SUNXI_FUNCTION(0x0, "gpio_in"),
67 		  SUNXI_FUNCTION(0x1, "gpio_out"),
68 		  SUNXI_FUNCTION(0x3, "s_jtag"),	/* DI */
69 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 7)),	/* PL_EINT7 */
70 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8),
71 		  SUNXI_FUNCTION(0x0, "gpio_in"),
72 		  SUNXI_FUNCTION(0x1, "gpio_out"),
73 		  SUNXI_FUNCTION(0x2, "s_twi"),		/* SCK */
74 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 8)),	/* PL_EINT8 */
75 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 9),
76 		  SUNXI_FUNCTION(0x0, "gpio_in"),
77 		  SUNXI_FUNCTION(0x1, "gpio_out"),
78 		  SUNXI_FUNCTION(0x2, "s_twi"),		/* SDA */
79 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 9)),	/* PL_EINT9 */
80 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 10),
81 		  SUNXI_FUNCTION(0x0, "gpio_in"),
82 		  SUNXI_FUNCTION(0x1, "gpio_out"),
83 		  SUNXI_FUNCTION(0x2, "s_pwm"),
84 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 10)),	/* PL_EINT10 */
85 	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 11),
86 		  SUNXI_FUNCTION(0x0, "gpio_in"),
87 		  SUNXI_FUNCTION(0x1, "gpio_out"),
88 		  SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 11)),	/* PL_EINT11 */
89 };
90 
91 static const struct sunxi_pinctrl_desc sun8i_a23_r_pinctrl_data = {
92 	.pins = sun8i_a23_r_pins,
93 	.npins = ARRAY_SIZE(sun8i_a23_r_pins),
94 	.pin_base = PL_BASE,
95 	.irq_banks = 1,
96 	.disable_strict_mode = true,
97 };
98 
sun8i_a23_r_pinctrl_probe(struct platform_device * pdev)99 static int sun8i_a23_r_pinctrl_probe(struct platform_device *pdev)
100 {
101 	struct reset_control *rstc;
102 	int ret;
103 
104 	rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
105 	if (IS_ERR(rstc)) {
106 		ret = PTR_ERR(rstc);
107 		if (ret == -EPROBE_DEFER)
108 			return ret;
109 		dev_err(&pdev->dev, "Reset controller missing err=%d\n", ret);
110 		return ret;
111 	}
112 
113 	ret = reset_control_deassert(rstc);
114 	if (ret)
115 		return ret;
116 
117 	ret = sunxi_pinctrl_init(pdev,
118 				 &sun8i_a23_r_pinctrl_data);
119 
120 	if (ret)
121 		reset_control_assert(rstc);
122 
123 	return ret;
124 }
125 
126 static const struct of_device_id sun8i_a23_r_pinctrl_match[] = {
127 	{ .compatible = "allwinner,sun8i-a23-r-pinctrl", },
128 	{}
129 };
130 
131 static struct platform_driver sun8i_a23_r_pinctrl_driver = {
132 	.probe	= sun8i_a23_r_pinctrl_probe,
133 	.driver	= {
134 		.name		= "sun8i-a23-r-pinctrl",
135 		.of_match_table	= sun8i_a23_r_pinctrl_match,
136 	},
137 };
138 builtin_platform_driver(sun8i_a23_r_pinctrl_driver);
139