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-rw-r--r--arch/arm/mach-u300/i2c.c285
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diff --git a/arch/arm/mach-u300/i2c.c b/arch/arm/mach-u300/i2c.c
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1/*
2 * arch/arm/mach-u300/i2c.c
3 *
4 * Copyright (C) 2009-2012 ST-Ericsson AB
5 * License terms: GNU General Public License (GPL) version 2
6 *
7 * Register board i2c devices
8 * Author: Linus Walleij <linus.walleij@stericsson.com>
9 */
10#include <linux/kernel.h>
11#include <linux/i2c.h>
12#include <linux/mfd/ab3100.h>
13#include <linux/regulator/machine.h>
14#include <linux/amba/bus.h>
15#include <mach/irqs.h>
16
17/*
18 * Initial settings of ab3100 registers.
19 * Common for below LDO regulator settings are that
20 * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0).
21 * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode.
22 */
23
24/* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */
25#define LDO_A_SETTING 0x16
26/* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */
27#define LDO_C_SETTING 0x10
28/* LDO_D 0x10: 2.65V, ON, sleep mode not used */
29#define LDO_D_SETTING 0x10
30/* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */
31#define LDO_E_SETTING 0x10
32/* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */
33#define LDO_E_SLEEP_SETTING 0x00
34/* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */
35#define LDO_F_SETTING 0xD0
36/* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */
37#define LDO_G_SETTING 0x00
38/* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */
39#define LDO_H_SETTING 0x18
40/* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */
41#define LDO_K_SETTING 0x00
42/* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */
43#define LDO_EXT_SETTING 0x00
44/* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */
45#define BUCK_SETTING 0x7D
46/* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */
47#define BUCK_SLEEP_SETTING 0xAC
48
49#ifdef CONFIG_AB3100_CORE
50static struct regulator_consumer_supply supply_ldo_c[] = {
51 {
52 .dev_name = "ab3100-codec",
53 .supply = "vaudio", /* Powers the codec */
54 },
55};
56
57/*
58 * This one needs to be a supply so we can turn it off
59 * in order to shut down the system.
60 */
61static struct regulator_consumer_supply supply_ldo_d[] = {
62 {
63 .supply = "vana15", /* Powers the SoC (CPU etc) */
64 },
65};
66
67static struct regulator_consumer_supply supply_ldo_g[] = {
68 {
69 .dev_name = "mmci",
70 .supply = "vmmc", /* Powers MMC/SD card */
71 },
72};
73
74static struct regulator_consumer_supply supply_ldo_h[] = {
75 {
76 .dev_name = "xgam_pdi",
77 .supply = "vdisp", /* Powers camera, display etc */
78 },
79};
80
81static struct regulator_consumer_supply supply_ldo_k[] = {
82 {
83 .dev_name = "irda",
84 .supply = "vir", /* Power IrDA */
85 },
86};
87
88/*
89 * This is a placeholder for whoever wish to use the
90 * external power.
91 */
92static struct regulator_consumer_supply supply_ldo_ext[] = {
93 {
94 .supply = "vext", /* External power */
95 },
96};
97
98/* Preset (hardware defined) voltages for these regulators */
99#define LDO_A_VOLTAGE 2750000
100#define LDO_C_VOLTAGE 2650000
101#define LDO_D_VOLTAGE 2650000
102
103static struct ab3100_platform_data ab3100_plf_data = {
104 .reg_constraints = {
105 /* LDO A routing and constraints */
106 {
107 .constraints = {
108 .name = "vrad",
109 .min_uV = LDO_A_VOLTAGE,
110 .max_uV = LDO_A_VOLTAGE,
111 .valid_modes_mask = REGULATOR_MODE_NORMAL,
112 .always_on = 1,
113 .boot_on = 1,
114 },
115 },
116 /* LDO C routing and constraints */
117 {
118 .constraints = {
119 .min_uV = LDO_C_VOLTAGE,
120 .max_uV = LDO_C_VOLTAGE,
121 .valid_modes_mask = REGULATOR_MODE_NORMAL,
122 },
123 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_c),
124 .consumer_supplies = supply_ldo_c,
125 },
126 /* LDO D routing and constraints */
127 {
128 .constraints = {
129 .min_uV = LDO_D_VOLTAGE,
130 .max_uV = LDO_D_VOLTAGE,
131 .valid_modes_mask = REGULATOR_MODE_NORMAL,
132 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
133 /*
134 * Actually this is boot_on but we need
135 * to reference count it externally to
136 * be able to shut down the system.
137 */
138 },
139 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
140 .consumer_supplies = supply_ldo_d,
141 },
142 /* LDO E routing and constraints */
143 {
144 .constraints = {
145 .name = "vio",
146 .min_uV = 1800000,
147 .max_uV = 1800000,
148 .valid_modes_mask = REGULATOR_MODE_NORMAL,
149 .always_on = 1,
150 .boot_on = 1,
151 },
152 },
153 /* LDO F routing and constraints */
154 {
155 .constraints = {
156 .name = "vana25",
157 .min_uV = 2500000,
158 .max_uV = 2500000,
159 .valid_modes_mask = REGULATOR_MODE_NORMAL,
160 .always_on = 1,
161 .boot_on = 1,
162 },
163 },
164 /* LDO G routing and constraints */
165 {
166 .constraints = {
167 .min_uV = 1500000,
168 .max_uV = 2850000,
169 .valid_modes_mask = REGULATOR_MODE_NORMAL,
170 .valid_ops_mask =
171 REGULATOR_CHANGE_VOLTAGE |
172 REGULATOR_CHANGE_STATUS,
173 },
174 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_g),
175 .consumer_supplies = supply_ldo_g,
176 },
177 /* LDO H routing and constraints */
178 {
179 .constraints = {
180 .min_uV = 1200000,
181 .max_uV = 2750000,
182 .valid_modes_mask = REGULATOR_MODE_NORMAL,
183 .valid_ops_mask =
184 REGULATOR_CHANGE_VOLTAGE |
185 REGULATOR_CHANGE_STATUS,
186 },
187 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_h),
188 .consumer_supplies = supply_ldo_h,
189 },
190 /* LDO K routing and constraints */
191 {
192 .constraints = {
193 .min_uV = 1800000,
194 .max_uV = 2750000,
195 .valid_modes_mask = REGULATOR_MODE_NORMAL,
196 .valid_ops_mask =
197 REGULATOR_CHANGE_VOLTAGE |
198 REGULATOR_CHANGE_STATUS,
199 },
200 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_k),
201 .consumer_supplies = supply_ldo_k,
202 },
203 /* External regulator interface. No fixed voltage specified.
204 * If we knew the voltage of the external regulator and it
205 * was connected on the board, we could add the (fixed)
206 * voltage for it here.
207 */
208 {
209 .constraints = {
210 .min_uV = 0,
211 .max_uV = 0,
212 .valid_modes_mask = REGULATOR_MODE_NORMAL,
213 .valid_ops_mask =
214 REGULATOR_CHANGE_STATUS,
215 },
216 .num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext),
217 .consumer_supplies = supply_ldo_ext,
218 },
219 /* Buck converter routing and constraints */
220 {
221 .constraints = {
222 .name = "vcore",
223 .min_uV = 1200000,
224 .max_uV = 1800000,
225 .valid_modes_mask = REGULATOR_MODE_NORMAL,
226 .valid_ops_mask =
227 REGULATOR_CHANGE_VOLTAGE,
228 .always_on = 1,
229 .boot_on = 1,
230 },
231 },
232 },
233 .reg_initvals = {
234 LDO_A_SETTING,
235 LDO_C_SETTING,
236 LDO_E_SETTING,
237 LDO_E_SLEEP_SETTING,
238 LDO_F_SETTING,
239 LDO_G_SETTING,
240 LDO_H_SETTING,
241 LDO_K_SETTING,
242 LDO_EXT_SETTING,
243 BUCK_SETTING,
244 BUCK_SLEEP_SETTING,
245 LDO_D_SETTING,
246 },
247};
248#endif
249
250static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
251#ifdef CONFIG_AB3100_CORE
252 {
253 .type = "ab3100",
254 .addr = 0x48,
255 .irq = IRQ_U300_IRQ0_EXT,
256 .platform_data = &ab3100_plf_data,
257 },
258#else
259 { },
260#endif
261};
262
263static struct i2c_board_info __initdata bus1_i2c_board_info[] = {
264 {
265 .type = "fwcam",
266 .addr = 0x10,
267 },
268 {
269 .type = "fwcam",
270 .addr = 0x5d,
271 },
272};
273
274void __init u300_i2c_register_board_devices(void)
275{
276 i2c_register_board_info(0, bus0_i2c_board_info,
277 ARRAY_SIZE(bus0_i2c_board_info));
278 /*
279 * This makes the core shut down all unused regulators
280 * after all the initcalls have completed.
281 */
282 regulator_has_full_constraints();
283 i2c_register_board_info(1, bus1_i2c_board_info,
284 ARRAY_SIZE(bus1_i2c_board_info));
285}
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