/*
* arch/arm/mach-u300/i2c.c
*
* Copyright (C) 2009-2012 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/ab3100.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[] = {
{
.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[] = {
{
.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,
.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,
.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,
.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
static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
#ifdef 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[] = {
{
.type = "fwcam",
.addr = 0x10,
},
{
.type = "fwcam",
.addr = 0x5d,
},
};
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));
}
