1/*
  2 * arch/arm/mach-u300/i2c.c
  3 *
  4 * Copyright (C) 2009 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/abx500.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#ifdef CONFIG_MACH_U300_BS335
265	{
266		.type = "fwcam",
267		.addr = 0x10,
268	},
269	{
270		.type = "fwcam",
271		.addr = 0x5d,
272	},
273#else
274	{ },
275#endif
276};
277
278void __init u300_i2c_register_board_devices(void)
279{
280	i2c_register_board_info(0, bus0_i2c_board_info,
281				ARRAY_SIZE(bus0_i2c_board_info));
282	/*
283	 * This makes the core shut down all unused regulators
284	 * after all the initcalls have completed.
285	 */
286	regulator_has_full_constraints();
287	i2c_register_board_info(1, bus1_i2c_board_info,
288				ARRAY_SIZE(bus1_i2c_board_info));
289}