arch/arm/mach-u300/i2c.c

   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
  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                 .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                 .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
 103 static 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
 250 static 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
 263 static 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
 274 void __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 }