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i2c.c

/*
 * arch/arm/mach-u300/i2c.c
 *
 * Copyright (C) 2009 ST-Ericsson AB
 * License terms: GNU General Public License (GPL) version 2
 *
 * Register board i2c devices
 * Author: Linus Walleij <linus.walleij@stericsson.com>
 */
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/mfd/abx500.h>
#include <linux/regulator/machine.h>
#include <linux/amba/bus.h>
#include <mach/irqs.h>

/*
 * Initial settings of ab3100 registers.
 * Common for below LDO regulator settings are that
 * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0).
 * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode.
 */

/* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */
#define LDO_A_SETTING         0x16
/* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */
#define LDO_C_SETTING         0x10
/* LDO_D 0x10: 2.65V, ON, sleep mode not used */
#define LDO_D_SETTING         0x10
/* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */
#define LDO_E_SETTING         0x10
/* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */
#define LDO_E_SLEEP_SETTING   0x00
/* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */
#define LDO_F_SETTING         0xD0
/* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */
#define LDO_G_SETTING         0x00
/* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */
#define LDO_H_SETTING         0x18
/* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */
#define LDO_K_SETTING         0x00
/* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */
#define LDO_EXT_SETTING       0x00
/* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */
#define BUCK_SETTING    0x7D
/* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */
#define BUCK_SLEEP_SETTING    0xAC

#ifdef CONFIG_AB3100_CORE
static struct regulator_consumer_supply supply_ldo_c[] = {
      {
            .dev_name = "ab3100-codec",
            .supply = "vaudio", /* Powers the codec */
      },
};

/*
 * This one needs to be a supply so we can turn it off
 * in order to shut down the system.
 */
static struct regulator_consumer_supply supply_ldo_d[] = {
      {
            .dev = NULL,
            .supply = "vana15", /* Powers the SoC (CPU etc) */
      },
};

static struct regulator_consumer_supply supply_ldo_g[] = {
      {
            .dev_name = "mmci",
            .supply = "vmmc", /* Powers MMC/SD card */
      },
};

static struct regulator_consumer_supply supply_ldo_h[] = {
      {
            .dev_name = "xgam_pdi",
            .supply = "vdisp", /* Powers camera, display etc */
      },
};

static struct regulator_consumer_supply supply_ldo_k[] = {
      {
            .dev_name = "irda",
            .supply = "vir", /* Power IrDA */
      },
};

/*
 * This is a placeholder for whoever wish to use the
 * external power.
 */
static struct regulator_consumer_supply supply_ldo_ext[] = {
      {
            .dev = NULL,
            .supply = "vext", /* External power */
      },
};

/* Preset (hardware defined) voltages for these regulators */
#define LDO_A_VOLTAGE 2750000
#define LDO_C_VOLTAGE 2650000
#define LDO_D_VOLTAGE 2650000

static struct ab3100_platform_data ab3100_plf_data = {
      .reg_constraints = {
            /* LDO A routing and constraints */
            {
                  .constraints = {
                        .name = "vrad",
                        .min_uV = LDO_A_VOLTAGE,
                        .max_uV = LDO_A_VOLTAGE,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .always_on = 1,
                        .boot_on = 1,
                  },
            },
            /* LDO C routing and constraints */
            {
                  .constraints = {
                        .min_uV = LDO_C_VOLTAGE,
                        .max_uV = LDO_C_VOLTAGE,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_c),
                  .consumer_supplies = supply_ldo_c,
            },
            /* LDO D routing and constraints */
            {
                  .constraints = {
                        .min_uV = LDO_D_VOLTAGE,
                        .max_uV = LDO_D_VOLTAGE,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
                        /*
                         * Actually this is boot_on but we need
                         * to reference count it externally to
                         * be able to shut down the system.
                         */
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
                  .consumer_supplies = supply_ldo_d,
            },
            /* LDO E routing and constraints */
            {
                  .constraints = {
                        .name = "vio",
                        .min_uV = 1800000,
                        .max_uV = 1800000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                        .always_on = 1,
                        .boot_on = 1,
                  },
            },
            /* LDO F routing and constraints */
            {
                  .constraints = {
                        .name = "vana25",
                        .min_uV = 2500000,
                        .max_uV = 2500000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                        .always_on = 1,
                        .boot_on = 1,
                  },
            },
            /* LDO G routing and constraints */
            {
                  .constraints = {
                        .min_uV = 1500000,
                        .max_uV = 2850000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_g),
                  .consumer_supplies = supply_ldo_g,
            },
            /* LDO H routing and constraints */
            {
                  .constraints = {
                        .min_uV = 1200000,
                        .max_uV = 2750000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_h),
                  .consumer_supplies = supply_ldo_h,
            },
            /* LDO K routing and constraints */
            {
                  .constraints = {
                        .min_uV = 1800000,
                        .max_uV = 2750000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_k),
                  .consumer_supplies = supply_ldo_k,
            },
            /* External regulator interface. No fixed voltage specified.
             * If we knew the voltage of the external regulator and it
             * was connected on the board, we could add the (fixed)
             * voltage for it here.
             */
            {
                  .constraints = {
                        .min_uV = 0,
                        .max_uV = 0,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_STATUS,
                  },
                  .num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext),
                  .consumer_supplies = supply_ldo_ext,
            },
            /* Buck converter routing and constraints */
            {
                  .constraints = {
                        .name = "vcore",
                        .min_uV = 1200000,
                        .max_uV = 1800000,
                        .valid_modes_mask = REGULATOR_MODE_NORMAL,
                        .valid_ops_mask =
                        REGULATOR_CHANGE_VOLTAGE |
                        REGULATOR_CHANGE_STATUS,
                        .always_on = 1,
                        .boot_on = 1,
                  },
            },
      },
      .reg_initvals = {
            LDO_A_SETTING,
            LDO_C_SETTING,
            LDO_E_SETTING,
            LDO_E_SLEEP_SETTING,
            LDO_F_SETTING,
            LDO_G_SETTING,
            LDO_H_SETTING,
            LDO_K_SETTING,
            LDO_EXT_SETTING,
            BUCK_SETTING,
            BUCK_SLEEP_SETTING,
            LDO_D_SETTING,
      },
};
#endif

#ifdef CONFIG_AB3550_CORE
static struct abx500_init_settings ab3550_init_settings[] = {
      {
            .bank = 0,
            .reg = AB3550_IMR1,
            .setting = 0xff
      },
      {
            .bank = 0,
            .reg = AB3550_IMR2,
            .setting = 0xff
      },
      {
            .bank = 0,
            .reg = AB3550_IMR3,
            .setting = 0xff
      },
      {
            .bank = 0,
            .reg = AB3550_IMR4,
            .setting = 0xff
      },
      {
            .bank = 0,
            .reg = AB3550_IMR5,
            /* The two most significant bits are not used */
            .setting = 0x3f
      },
};

static struct ab3550_platform_data ab3550_plf_data = {
      .irq = {
            .base = IRQ_AB3550_BASE,
            .count = (IRQ_AB3550_END - IRQ_AB3550_BASE + 1),
      },
      .dev_data = {
      },
      .init_settings = ab3550_init_settings,
      .init_settings_sz = ARRAY_SIZE(ab3550_init_settings),
};
#endif

static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
#if defined(CONFIG_AB3550_CORE)
      {
            .type = "ab3550",
            .addr = 0x4A,
            .irq = IRQ_U300_IRQ0_EXT,
            .platform_data = &ab3550_plf_data,
      },
#elif defined(CONFIG_AB3100_CORE)
      {
            .type = "ab3100",
            .addr = 0x48,
            .irq = IRQ_U300_IRQ0_EXT,
            .platform_data = &ab3100_plf_data,
      },
#else
      { },
#endif
};

static struct i2c_board_info __initdata bus1_i2c_board_info[] = {
#ifdef CONFIG_MACH_U300_BS335
      {
            .type = "fwcam",
            .addr = 0x10,
      },
      {
            .type = "fwcam",
            .addr = 0x5d,
      },
#else
      { },
#endif
};

void __init u300_i2c_register_board_devices(void)
{
      i2c_register_board_info(0, bus0_i2c_board_info,
                        ARRAY_SIZE(bus0_i2c_board_info));
      /*
       * This makes the core shut down all unused regulators
       * after all the initcalls have completed.
       */
      regulator_has_full_constraints();
      i2c_register_board_info(1, bus1_i2c_board_info,
                        ARRAY_SIZE(bus1_i2c_board_info));
}

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