diff options
Diffstat (limited to 'arch/arm/mach-mx5/mx53_ard_pmic_ltc3589.c')
| -rw-r--r-- | arch/arm/mach-mx5/mx53_ard_pmic_ltc3589.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/mx53_ard_pmic_ltc3589.c b/arch/arm/mach-mx5/mx53_ard_pmic_ltc3589.c new file mode 100644 index 000000000000..02538815d2a4 --- /dev/null +++ b/arch/arm/mach-mx5/mx53_ard_pmic_ltc3589.c @@ -0,0 +1,228 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * mx53_ard_pmic_ltc3589.c -- i.MX53 ARD Driver for Linear LTC3589 + * PMIC + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/regulator/ltc3589.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/ltc3589/core.h> +#include <mach/iomux-mx53.h> +#include <mach/irqs.h> + +#define ARD_PMIC_INT (4*32 + 7) /* GPIO_5_7 */ + +/* CPU */ +static struct regulator_consumer_supply sw1_consumers[] = { + { + .supply = "cpu_vcc", + } +}; + +struct ltc3589; + +static struct regulator_init_data sw1_init = { + .constraints = { + .name = "SW1", + .min_uV = 564000, + .max_uV = 1167000, + .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE, + .valid_modes_mask = 0, + .always_on = 1, + .boot_on = 1, + .initial_state = PM_SUSPEND_MEM, + .state_mem = { + .uV = 950000, + .mode = REGULATOR_MODE_NORMAL, + .enabled = 1, + }, + }, + .num_consumer_supplies = ARRAY_SIZE(sw1_consumers), + .consumer_supplies = sw1_consumers, +}; + +static struct regulator_init_data sw2_init = { + .constraints = { + .name = "SW2", + .min_uV = 704000, + .max_uV = 1456000, + .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE, + .always_on = 1, + .boot_on = 1, + .initial_state = PM_SUSPEND_MEM, + .state_mem = { + .uV = 950000, + .mode = REGULATOR_MODE_NORMAL, + .enabled = 1, + }, + }, +}; + +static struct regulator_init_data sw3_init = { + .constraints = { + .name = "SW3", + .min_uV = 1342000, + .max_uV = 2775000, + .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE, + .always_on = 1, + .boot_on = 1, + }, +}; + +static struct regulator_init_data sw4_init = { + .constraints = { + .name = "SW4", + .apply_uV = 1, + .boot_on = 1, + } +}; + +static struct regulator_init_data ldo1_init = { + .constraints = { + .name = "LDO1_STBY", + .apply_uV = 1, + .boot_on = 1, + }, +}; + +static struct regulator_init_data ldo2_init = { + .constraints = { + .name = "LDO2", + .min_uV = 704000, + .max_uV = 1456000, + .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE, + .valid_modes_mask = REGULATOR_MODE_NORMAL, + .always_on = 1, + .boot_on = 1, + }, +}; + +static struct regulator_init_data ldo3_init = { + .constraints = { + .name = "LDO3", + .apply_uV = 1, + .boot_on = 1, + }, +}; + +static struct regulator_init_data ldo4_init = { + .constraints = { + .name = "LDO4", + .min_uV = 1800000, + .max_uV = 3300000, + .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE, + .valid_modes_mask = REGULATOR_MODE_NORMAL, + .always_on = 1, + .boot_on = 1, + }, +}; + +static void ltc3589_nop_release(struct device *dev) +{ + /* Nothing */ +} + +static struct platform_device ltc3589_regulator_device[] = { + { + .name = "ltc3589-dev", + .id = 0, + .dev = { + .release = ltc3589_nop_release, + }, + }, +}; + +static int mx53_ltc3589_init(struct ltc3589 *ltc3589) +{ + int i; + + printk(KERN_INFO "Initializing regulators for ARD\n"); + for (i = 0; i < ARRAY_SIZE(ltc3589_regulator_device); i++) { + if (platform_device_register(<c3589_regulator_device[i]) < 0) + dev_err(<c3589_regulator_device[i].dev, + "Unable to register LTC3589 device\n"); + } + + ltc3589_register_regulator(ltc3589, LTC3589_SW1, &sw1_init); + ltc3589_register_regulator(ltc3589, LTC3589_SW2, &sw2_init); + ltc3589_register_regulator(ltc3589, LTC3589_SW3, &sw3_init); + ltc3589_register_regulator(ltc3589, LTC3589_SW4, &sw4_init); + ltc3589_register_regulator(ltc3589, LTC3589_LDO1, &ldo1_init); + ltc3589_register_regulator(ltc3589, LTC3589_LDO2, &ldo2_init); + ltc3589_register_regulator(ltc3589, LTC3589_LDO3, &ldo3_init); + ltc3589_register_regulator(ltc3589, LTC3589_LDO4, &ldo4_init); + + return 0; +} + +static struct ltc3589_platform_data __initdata ltc3589_plat = { + .init = mx53_ltc3589_init, +}; + +static struct i2c_board_info __initdata ltc3589_i2c_device = { + I2C_BOARD_INFO("ltc3589", 0x34), + .irq = IOMUX_TO_IRQ_V3(ARD_PMIC_INT), + .platform_data = <c3589_plat, +}; + +static __init int mx53_init_i2c(void) +{ + return i2c_register_board_info(1, <c3589_i2c_device, 1); +} + +subsys_initcall(mx53_init_i2c); + +static __init int ltc3589_pmic_init(void) +{ + int i = 0; + int ret = 0; + struct regulator *regulator; + + char *ltc3589_global_regulator[] = { + "SW1", + "SW2", + "SW3", + "SW4", + "LDO1_STBY", + "LDO2", + "LDO3", + "LDO4", + }; + + while ((i < ARRAY_SIZE(ltc3589_global_regulator)) && + !IS_ERR_VALUE( + (unsigned long)(regulator = + regulator_get(NULL, + ltc3589_global_regulator + [i])))) { + regulator_enable(regulator); + i++; + } + + return ret; +} + +late_initcall(ltc3589_pmic_init); + |