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