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/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 static struct regulator_consumer_supply supply_ldo_c[] = {
  50         {
  51                 .dev_name = "ab3100-codec",
  52                 .supply = "vaudio", /* Powers the codec */
  53         },
  54 };
  55
  56 /*
  57  * This one needs to be a supply so we can turn it off
  58  * in order to shut down the system.
  59  */
  60 static struct regulator_consumer_supply supply_ldo_d[] = {
  61         {
  62                 .dev = NULL,
  63                 .supply = "vana15", /* Powers the SoC (CPU etc) */
  64         },
  65 };
  66
  67 static struct regulator_consumer_supply supply_ldo_g[] = {
  68         {
  69                 .dev_name = "mmci",
  70                 .supply = "vmmc", /* Powers MMC/SD card */
  71         },
  72 };
  73
  74 static struct regulator_consumer_supply supply_ldo_h[] = {
  75         {
  76                 .dev_name = "xgam_pdi",
  77                 .supply = "vdisp", /* Powers camera, display etc */
  78         },
  79 };
  80
  81 static 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  */
  92 static struct regulator_consumer_supply supply_ldo_ext[] = {
  93         {
  94                 .dev = NULL,
  95                 .supply = "vext", /* External power */
  96         },
  97 };
  98
  99 /* Preset (hardware defined) voltages for these regulators */
 100 #define LDO_A_VOLTAGE 2750000
 101 #define LDO_C_VOLTAGE 2650000
 102 #define LDO_D_VOLTAGE 2650000
 103
 104 static struct ab3100_platform_data ab3100_plf_data = {
 105         .reg_constraints = {
 106                 /* LDO A routing and constraints */
 107                 {
 108                         .constraints = {
 109                                 .name = "vrad",
 110                                 .min_uV = LDO_A_VOLTAGE,
 111                                 .max_uV = LDO_A_VOLTAGE,
 112                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 113                                 .always_on = 1,
 114                                 .boot_on = 1,
 115                         },
 116                 },
 117                 /* LDO C routing and constraints */
 118                 {
 119                         .constraints = {
 120                                 .min_uV = LDO_C_VOLTAGE,
 121                                 .max_uV = LDO_C_VOLTAGE,
 122                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 123                         },
 124                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_c),
 125                         .consumer_supplies = supply_ldo_c,
 126                 },
 127                 /* LDO D routing and constraints */
 128                 {
 129                         .constraints = {
 130                                 .min_uV = LDO_D_VOLTAGE,
 131                                 .max_uV = LDO_D_VOLTAGE,
 132                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 133                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 134                                 /*
 135                                  * Actually this is boot_on but we need
 136                                  * to reference count it externally to
 137                                  * be able to shut down the system.
 138                                  */
 139                         },
 140                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
 141                         .consumer_supplies = supply_ldo_d,
 142                 },
 143                 /* LDO E routing and constraints */
 144                 {
 145                         .constraints = {
 146                                 .name = "vio",
 147                                 .min_uV = 1800000,
 148                                 .max_uV = 1800000,
 149                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 150                                 .valid_ops_mask =
 151                                 REGULATOR_CHANGE_VOLTAGE |
 152                                 REGULATOR_CHANGE_STATUS,
 153                                 .always_on = 1,
 154                                 .boot_on = 1,
 155                         },
 156                 },
 157                 /* LDO F routing and constraints */
 158                 {
 159                         .constraints = {
 160                                 .name = "vana25",
 161                                 .min_uV = 2500000,
 162                                 .max_uV = 2500000,
 163                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 164                                 .valid_ops_mask =
 165                                 REGULATOR_CHANGE_VOLTAGE |
 166                                 REGULATOR_CHANGE_STATUS,
 167                                 .always_on = 1,
 168                                 .boot_on = 1,
 169                         },
 170                 },
 171                 /* LDO G routing and constraints */
 172                 {
 173                         .constraints = {
 174                                 .min_uV = 1500000,
 175                                 .max_uV = 2850000,
 176                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 177                                 .valid_ops_mask =
 178                                 REGULATOR_CHANGE_VOLTAGE |
 179                                 REGULATOR_CHANGE_STATUS,
 180                         },
 181                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_g),
 182                         .consumer_supplies = supply_ldo_g,
 183                 },
 184                 /* LDO H routing and constraints */
 185                 {
 186                         .constraints = {
 187                                 .min_uV = 1200000,
 188                                 .max_uV = 2750000,
 189                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 190                                 .valid_ops_mask =
 191                                 REGULATOR_CHANGE_VOLTAGE |
 192                                 REGULATOR_CHANGE_STATUS,
 193                         },
 194                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_h),
 195                         .consumer_supplies = supply_ldo_h,
 196                 },
 197                 /* LDO K routing and constraints */
 198                 {
 199                         .constraints = {
 200                                 .min_uV = 1800000,
 201                                 .max_uV = 2750000,
 202                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 203                                 .valid_ops_mask =
 204                                 REGULATOR_CHANGE_VOLTAGE |
 205                                 REGULATOR_CHANGE_STATUS,
 206                         },
 207                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_k),
 208                         .consumer_supplies = supply_ldo_k,
 209                 },
 210                 /* External regulator interface. No fixed voltage specified.
 211                  * If we knew the voltage of the external regulator and it
 212                  * was connected on the board, we could add the (fixed)
 213                  * voltage for it here.
 214                  */
 215                 {
 216                         .constraints = {
 217                                 .min_uV = 0,
 218                                 .max_uV = 0,
 219                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 220                                 .valid_ops_mask =
 221                                 REGULATOR_CHANGE_STATUS,
 222                         },
 223                         .num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext),
 224                         .consumer_supplies = supply_ldo_ext,
 225                 },
 226                 /* Buck converter routing and constraints */
 227                 {
 228                         .constraints = {
 229                                 .name = "vcore",
 230                                 .min_uV = 1200000,
 231                                 .max_uV = 1800000,
 232                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 233                                 .valid_ops_mask =
 234                                 REGULATOR_CHANGE_VOLTAGE |
 235                                 REGULATOR_CHANGE_STATUS,
 236                                 .always_on = 1,
 237                                 .boot_on = 1,
 238                         },
 239                 },
 240         },
 241         .reg_initvals = {
 242                 LDO_A_SETTING,
 243                 LDO_C_SETTING,
 244                 LDO_E_SETTING,
 245                 LDO_E_SLEEP_SETTING,
 246                 LDO_F_SETTING,
 247                 LDO_G_SETTING,
 248                 LDO_H_SETTING,
 249                 LDO_K_SETTING,
 250                 LDO_EXT_SETTING,
 251                 BUCK_SETTING,
 252                 BUCK_SLEEP_SETTING,
 253                 LDO_D_SETTING,
 254         },
 255 };
 256
 257 static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
 258         {
 259                 .type = "ab3100",
 260                 .addr = 0x48,
 261                 .irq = IRQ_U300_IRQ0_EXT,
 262                 .platform_data = &ab3100_plf_data,
 263         },
 264 };
 265
 266 static struct i2c_board_info __initdata bus1_i2c_board_info[] = {
 267 #ifdef CONFIG_MACH_U300_BS335
 268         {
 269                 .type = "fwcam",
 270                 .addr = 0x10,
 271         },
 272         {
 273                 .type = "fwcam",
 274                 .addr = 0x5d,
 275         },
 276 #else
 277         { },
 278 #endif
 279 };
 280
 281 void __init u300_i2c_register_board_devices(void)
 282 {
 283         i2c_register_board_info(0, bus0_i2c_board_info,
 284                                 ARRAY_SIZE(bus0_i2c_board_info));
 285         /*
 286          * This makes the core shut down all unused regulators
 287          * after all the initcalls have completed.
 288          */
 289         regulator_has_full_constraints();
 290         i2c_register_board_info(1, bus1_i2c_board_info,
 291                                 ARRAY_SIZE(bus1_i2c_board_info));
 292 }