arch/arm/mach-u300/i2c.c

   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
  50 static 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  */
  61 static struct regulator_consumer_supply supply_ldo_d[] = {
  62         {
  63                 .dev = NULL,
  64                 .supply = "vana15", /* Powers the SoC (CPU etc) */
  65         },
  66 };
  67
  68 static struct regulator_consumer_supply supply_ldo_g[] = {
  69         {
  70                 .dev_name = "mmci",
  71                 .supply = "vmmc", /* Powers MMC/SD card */
  72         },
  73 };
  74
  75 static struct regulator_consumer_supply supply_ldo_h[] = {
  76         {
  77                 .dev_name = "xgam_pdi",
  78                 .supply = "vdisp", /* Powers camera, display etc */
  79         },
  80 };
  81
  82 static struct regulator_consumer_supply supply_ldo_k[] = {
  83         {
  84                 .dev_name = "irda",
  85                 .supply = "vir", /* Power IrDA */
  86         },
  87 };
  88
  89 /*
  90  * This is a placeholder for whoever wish to use the
  91  * external power.
  92  */
  93 static struct regulator_consumer_supply supply_ldo_ext[] = {
  94         {
  95                 .dev = NULL,
  96                 .supply = "vext", /* External power */
  97         },
  98 };
  99
 100 /* Preset (hardware defined) voltages for these regulators */
 101 #define LDO_A_VOLTAGE 2750000
 102 #define LDO_C_VOLTAGE 2650000
 103 #define LDO_D_VOLTAGE 2650000
 104
 105 static struct ab3100_platform_data ab3100_plf_data = {
 106         .reg_constraints = {
 107                 /* LDO A routing and constraints */
 108                 {
 109                         .constraints = {
 110                                 .name = "vrad",
 111                                 .min_uV = LDO_A_VOLTAGE,
 112                                 .max_uV = LDO_A_VOLTAGE,
 113                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 114                                 .always_on = 1,
 115                                 .boot_on = 1,
 116                         },
 117                 },
 118                 /* LDO C routing and constraints */
 119                 {
 120                         .constraints = {
 121                                 .min_uV = LDO_C_VOLTAGE,
 122                                 .max_uV = LDO_C_VOLTAGE,
 123                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 124                         },
 125                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_c),
 126                         .consumer_supplies = supply_ldo_c,
 127                 },
 128                 /* LDO D routing and constraints */
 129                 {
 130                         .constraints = {
 131                                 .min_uV = LDO_D_VOLTAGE,
 132                                 .max_uV = LDO_D_VOLTAGE,
 133                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 134                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 135                                 /*
 136                                  * Actually this is boot_on but we need
 137                                  * to reference count it externally to
 138                                  * be able to shut down the system.
 139                                  */
 140                         },
 141                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
 142                         .consumer_supplies = supply_ldo_d,
 143                 },
 144                 /* LDO E routing and constraints */
 145                 {
 146                         .constraints = {
 147                                 .name = "vio",
 148                                 .min_uV = 1800000,
 149                                 .max_uV = 1800000,
 150                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 151                                 .valid_ops_mask =
 152                                 REGULATOR_CHANGE_VOLTAGE |
 153                                 REGULATOR_CHANGE_STATUS,
 154                                 .always_on = 1,
 155                                 .boot_on = 1,
 156                         },
 157                 },
 158                 /* LDO F routing and constraints */
 159                 {
 160                         .constraints = {
 161                                 .name = "vana25",
 162                                 .min_uV = 2500000,
 163                                 .max_uV = 2500000,
 164                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 165                                 .valid_ops_mask =
 166                                 REGULATOR_CHANGE_VOLTAGE |
 167                                 REGULATOR_CHANGE_STATUS,
 168                                 .always_on = 1,
 169                                 .boot_on = 1,
 170                         },
 171                 },
 172                 /* LDO G routing and constraints */
 173                 {
 174                         .constraints = {
 175                                 .min_uV = 1500000,
 176                                 .max_uV = 2850000,
 177                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 178                                 .valid_ops_mask =
 179                                 REGULATOR_CHANGE_VOLTAGE |
 180                                 REGULATOR_CHANGE_STATUS,
 181                         },
 182                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_g),
 183                         .consumer_supplies = supply_ldo_g,
 184                 },
 185                 /* LDO H routing and constraints */
 186                 {
 187                         .constraints = {
 188                                 .min_uV = 1200000,
 189                                 .max_uV = 2750000,
 190                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 191                                 .valid_ops_mask =
 192                                 REGULATOR_CHANGE_VOLTAGE |
 193                                 REGULATOR_CHANGE_STATUS,
 194                         },
 195                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_h),
 196                         .consumer_supplies = supply_ldo_h,
 197                 },
 198                 /* LDO K routing and constraints */
 199                 {
 200                         .constraints = {
 201                                 .min_uV = 1800000,
 202                                 .max_uV = 2750000,
 203                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 204                                 .valid_ops_mask =
 205                                 REGULATOR_CHANGE_VOLTAGE |
 206                                 REGULATOR_CHANGE_STATUS,
 207                         },
 208                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_k),
 209                         .consumer_supplies = supply_ldo_k,
 210                 },
 211                 /* External regulator interface. No fixed voltage specified.
 212                  * If we knew the voltage of the external regulator and it
 213                  * was connected on the board, we could add the (fixed)
 214                  * voltage for it here.
 215                  */
 216                 {
 217                         .constraints = {
 218                                 .min_uV = 0,
 219                                 .max_uV = 0,
 220                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 221                                 .valid_ops_mask =
 222                                 REGULATOR_CHANGE_STATUS,
 223                         },
 224                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext),
 225                         .consumer_supplies = supply_ldo_ext,
 226                 },
 227                 /* Buck converter routing and constraints */
 228                 {
 229                         .constraints = {
 230                                 .name = "vcore",
 231                                 .min_uV = 1200000,
 232                                 .max_uV = 1800000,
 233                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 234                                 .valid_ops_mask =
 235                                 REGULATOR_CHANGE_VOLTAGE |
 236                                 REGULATOR_CHANGE_STATUS,
 237                                 .always_on = 1,
 238                                 .boot_on = 1,
 239                         },
 240                 },
 241         },
 242         .reg_initvals = {
 243                 LDO_A_SETTING,
 244                 LDO_C_SETTING,
 245                 LDO_E_SETTING,
 246                 LDO_E_SLEEP_SETTING,
 247                 LDO_F_SETTING,
 248                 LDO_G_SETTING,
 249                 LDO_H_SETTING,
 250                 LDO_K_SETTING,
 251                 LDO_EXT_SETTING,
 252                 BUCK_SETTING,
 253                 BUCK_SLEEP_SETTING,
 254                 LDO_D_SETTING,
 255         },
 256 };
 257 #endif
 258
 259 static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
 260 #ifdef CONFIG_AB3100_CORE
 261         {
 262                 .type = "ab3100",
 263                 .addr = 0x48,
 264                 .irq = IRQ_U300_IRQ0_EXT,
 265                 .platform_data = &ab3100_plf_data,
 266         },
 267 #else
 268         { },
 269 #endif
 270 };
 271
 272 static struct i2c_board_info __initdata bus1_i2c_board_info[] = {
 273 #ifdef CONFIG_MACH_U300_BS335
 274         {
 275                 .type = "fwcam",
 276                 .addr = 0x10,
 277         },
 278         {
 279                 .type = "fwcam",
 280                 .addr = 0x5d,
 281         },
 282 #else
 283         { },
 284 #endif
 285 };
 286
 287 void __init u300_i2c_register_board_devices(void)
 288 {
 289         i2c_register_board_info(0, bus0_i2c_board_info,
 290                                 ARRAY_SIZE(bus0_i2c_board_info));
 291         /*
 292          * This makes the core shut down all unused regulators
 293          * after all the initcalls have completed.
 294          */
 295         regulator_has_full_constraints();
 296         i2c_register_board_info(1, bus1_i2c_board_info,
 297                                 ARRAY_SIZE(bus1_i2c_board_info));
 298 }