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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
0e720393 MB |
2 | /* |
3 | * wm8350-core.c -- Device access for Wolfson WM8350 | |
4 | * | |
5 | * Copyright 2007, 2008 Wolfson Microelectronics PLC. | |
6 | * | |
7 | * Author: Liam Girdwood | |
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8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/errno.h> | |
13 | ||
14 | #include <linux/mfd/wm8350/core.h> | |
15 | #include <linux/mfd/wm8350/gpio.h> | |
16 | #include <linux/mfd/wm8350/pmic.h> | |
17 | ||
18 | static int gpio_set_dir(struct wm8350 *wm8350, int gpio, int dir) | |
19 | { | |
20 | int ret; | |
21 | ||
22 | wm8350_reg_unlock(wm8350); | |
23 | if (dir == WM8350_GPIO_DIR_OUT) | |
24 | ret = wm8350_clear_bits(wm8350, | |
25 | WM8350_GPIO_CONFIGURATION_I_O, | |
26 | 1 << gpio); | |
27 | else | |
28 | ret = wm8350_set_bits(wm8350, | |
29 | WM8350_GPIO_CONFIGURATION_I_O, | |
30 | 1 << gpio); | |
31 | wm8350_reg_lock(wm8350); | |
32 | return ret; | |
33 | } | |
34 | ||
aa9d842c | 35 | static int wm8350_gpio_set_debounce(struct wm8350 *wm8350, int gpio, int db) |
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36 | { |
37 | if (db == WM8350_GPIO_DEBOUNCE_ON) | |
38 | return wm8350_set_bits(wm8350, WM8350_GPIO_DEBOUNCE, | |
39 | 1 << gpio); | |
40 | else | |
41 | return wm8350_clear_bits(wm8350, | |
42 | WM8350_GPIO_DEBOUNCE, 1 << gpio); | |
43 | } | |
44 | ||
45 | static int gpio_set_func(struct wm8350 *wm8350, int gpio, int func) | |
46 | { | |
47 | u16 reg; | |
48 | ||
49 | wm8350_reg_unlock(wm8350); | |
50 | switch (gpio) { | |
51 | case 0: | |
52 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1) | |
53 | & ~WM8350_GP0_FN_MASK; | |
54 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1, | |
55 | reg | ((func & 0xf) << 0)); | |
56 | break; | |
57 | case 1: | |
58 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1) | |
59 | & ~WM8350_GP1_FN_MASK; | |
60 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1, | |
61 | reg | ((func & 0xf) << 4)); | |
62 | break; | |
63 | case 2: | |
64 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1) | |
65 | & ~WM8350_GP2_FN_MASK; | |
66 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1, | |
67 | reg | ((func & 0xf) << 8)); | |
68 | break; | |
69 | case 3: | |
70 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1) | |
71 | & ~WM8350_GP3_FN_MASK; | |
72 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1, | |
73 | reg | ((func & 0xf) << 12)); | |
74 | break; | |
75 | case 4: | |
76 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2) | |
77 | & ~WM8350_GP4_FN_MASK; | |
78 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2, | |
79 | reg | ((func & 0xf) << 0)); | |
80 | break; | |
81 | case 5: | |
82 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2) | |
83 | & ~WM8350_GP5_FN_MASK; | |
84 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2, | |
85 | reg | ((func & 0xf) << 4)); | |
86 | break; | |
87 | case 6: | |
88 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2) | |
89 | & ~WM8350_GP6_FN_MASK; | |
90 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2, | |
91 | reg | ((func & 0xf) << 8)); | |
92 | break; | |
93 | case 7: | |
94 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2) | |
95 | & ~WM8350_GP7_FN_MASK; | |
96 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2, | |
97 | reg | ((func & 0xf) << 12)); | |
98 | break; | |
99 | case 8: | |
100 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3) | |
101 | & ~WM8350_GP8_FN_MASK; | |
102 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3, | |
103 | reg | ((func & 0xf) << 0)); | |
104 | break; | |
105 | case 9: | |
106 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3) | |
107 | & ~WM8350_GP9_FN_MASK; | |
108 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3, | |
109 | reg | ((func & 0xf) << 4)); | |
110 | break; | |
111 | case 10: | |
112 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3) | |
113 | & ~WM8350_GP10_FN_MASK; | |
114 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3, | |
115 | reg | ((func & 0xf) << 8)); | |
116 | break; | |
117 | case 11: | |
118 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3) | |
119 | & ~WM8350_GP11_FN_MASK; | |
120 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3, | |
121 | reg | ((func & 0xf) << 12)); | |
122 | break; | |
123 | case 12: | |
124 | reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_4) | |
125 | & ~WM8350_GP12_FN_MASK; | |
126 | wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_4, | |
127 | reg | ((func & 0xf) << 0)); | |
128 | break; | |
129 | default: | |
130 | wm8350_reg_lock(wm8350); | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | wm8350_reg_lock(wm8350); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int gpio_set_pull_up(struct wm8350 *wm8350, int gpio, int up) | |
139 | { | |
140 | if (up) | |
141 | return wm8350_set_bits(wm8350, | |
142 | WM8350_GPIO_PIN_PULL_UP_CONTROL, | |
143 | 1 << gpio); | |
144 | else | |
145 | return wm8350_clear_bits(wm8350, | |
146 | WM8350_GPIO_PIN_PULL_UP_CONTROL, | |
147 | 1 << gpio); | |
148 | } | |
149 | ||
150 | static int gpio_set_pull_down(struct wm8350 *wm8350, int gpio, int down) | |
151 | { | |
152 | if (down) | |
153 | return wm8350_set_bits(wm8350, | |
154 | WM8350_GPIO_PULL_DOWN_CONTROL, | |
155 | 1 << gpio); | |
156 | else | |
157 | return wm8350_clear_bits(wm8350, | |
158 | WM8350_GPIO_PULL_DOWN_CONTROL, | |
159 | 1 << gpio); | |
160 | } | |
161 | ||
162 | static int gpio_set_polarity(struct wm8350 *wm8350, int gpio, int pol) | |
163 | { | |
164 | if (pol == WM8350_GPIO_ACTIVE_HIGH) | |
165 | return wm8350_set_bits(wm8350, | |
166 | WM8350_GPIO_PIN_POLARITY_TYPE, | |
167 | 1 << gpio); | |
168 | else | |
169 | return wm8350_clear_bits(wm8350, | |
170 | WM8350_GPIO_PIN_POLARITY_TYPE, | |
171 | 1 << gpio); | |
172 | } | |
173 | ||
174 | static int gpio_set_invert(struct wm8350 *wm8350, int gpio, int invert) | |
175 | { | |
176 | if (invert == WM8350_GPIO_INVERT_ON) | |
177 | return wm8350_set_bits(wm8350, WM8350_GPIO_INT_MODE, 1 << gpio); | |
178 | else | |
179 | return wm8350_clear_bits(wm8350, | |
180 | WM8350_GPIO_INT_MODE, 1 << gpio); | |
181 | } | |
182 | ||
183 | int wm8350_gpio_config(struct wm8350 *wm8350, int gpio, int dir, int func, | |
184 | int pol, int pull, int invert, int debounce) | |
185 | { | |
186 | /* make sure we never pull up and down at the same time */ | |
187 | if (pull == WM8350_GPIO_PULL_NONE) { | |
188 | if (gpio_set_pull_up(wm8350, gpio, 0)) | |
189 | goto err; | |
190 | if (gpio_set_pull_down(wm8350, gpio, 0)) | |
191 | goto err; | |
192 | } else if (pull == WM8350_GPIO_PULL_UP) { | |
193 | if (gpio_set_pull_down(wm8350, gpio, 0)) | |
194 | goto err; | |
195 | if (gpio_set_pull_up(wm8350, gpio, 1)) | |
196 | goto err; | |
197 | } else if (pull == WM8350_GPIO_PULL_DOWN) { | |
198 | if (gpio_set_pull_up(wm8350, gpio, 0)) | |
199 | goto err; | |
200 | if (gpio_set_pull_down(wm8350, gpio, 1)) | |
201 | goto err; | |
202 | } | |
203 | ||
204 | if (gpio_set_invert(wm8350, gpio, invert)) | |
205 | goto err; | |
206 | if (gpio_set_polarity(wm8350, gpio, pol)) | |
207 | goto err; | |
aa9d842c | 208 | if (wm8350_gpio_set_debounce(wm8350, gpio, debounce)) |
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209 | goto err; |
210 | if (gpio_set_dir(wm8350, gpio, dir)) | |
211 | goto err; | |
212 | return gpio_set_func(wm8350, gpio, func); | |
213 | ||
214 | err: | |
215 | return -EIO; | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(wm8350_gpio_config); |