diff options
author | Linus Walleij <linus.walleij@stericsson.com> | 2009-09-23 15:45:02 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-10-19 17:10:09 +0100 |
commit | 3d81277b65b5b356d81e54fa71f04868cee739e2 (patch) | |
tree | f9bca4055b82c91612a1ca87c636d9ce5e6f65a1 /arch | |
parent | 2fdc246aaf9a7fa088451ad2a72e9119b5f7f029 (diff) | |
download | linux-3d81277b65b5b356d81e54fa71f04868cee739e2.tar.bz2 |
ARM: 5724/1: U300 AB3100 boardinfo v5
This defines regulator platform data and board power
regulator hogs for the ST-Ericsson U300 platform.
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-u300/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-u300/i2c.c | 248 | ||||
-rw-r--r-- | arch/arm/mach-u300/regulator.c | 88 |
3 files changed, 337 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile index 885b5c027c1e..fab46fe9a71f 100644 --- a/arch/arm/mach-u300/Makefile +++ b/arch/arm/mach-u300/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_MMC) += mmc.o obj-$(CONFIG_SPI_PL022) += spi.o obj-$(CONFIG_MACH_U300_SPIDUMMY) += dummyspichip.o obj-$(CONFIG_I2C_STU300) += i2c.o +obj-$(CONFIG_REGULATOR_AB3100) += regulator.o diff --git a/arch/arm/mach-u300/i2c.c b/arch/arm/mach-u300/i2c.c index 10be1f888b27..7bc2503f6442 100644 --- a/arch/arm/mach-u300/i2c.c +++ b/arch/arm/mach-u300/i2c.c @@ -9,13 +9,256 @@ */ #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 + +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, + /* + * 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, + }, +}; + static struct i2c_board_info __initdata bus0_i2c_board_info[] = { { .type = "ab3100", .addr = 0x48, .irq = IRQ_U300_IRQ0_EXT, + .platform_data = &ab3100_plf_data, }, }; @@ -38,6 +281,11 @@ 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)); } diff --git a/arch/arm/mach-u300/regulator.c b/arch/arm/mach-u300/regulator.c new file mode 100644 index 000000000000..9c53f01c62eb --- /dev/null +++ b/arch/arm/mach-u300/regulator.c @@ -0,0 +1,88 @@ +/* + * arch/arm/mach-u300/regulator.c + * + * Copyright (C) 2009 ST-Ericsson AB + * License terms: GNU General Public License (GPL) version 2 + * Handle board-bound regulators and board power not related + * to any devices. + * Author: Linus Walleij <linus.walleij@stericsson.com> + */ +#include <linux/device.h> +#include <linux/signal.h> +#include <linux/err.h> +#include <linux/regulator/consumer.h> +/* Those are just for writing in syscon */ +#include <linux/io.h> +#include <mach/hardware.h> +#include <mach/syscon.h> + +/* + * Regulators that power the board and chip and which are + * not copuled to specific drivers are hogged in these + * instances. + */ +static struct regulator *main_power_15; + +/* + * This function is used from pm.h to shut down the system by + * resetting all regulators in turn and then disable regulator + * LDO D (main power). + */ +void u300_pm_poweroff(void) +{ + sigset_t old, all; + + sigfillset(&all); + if (!sigprocmask(SIG_BLOCK, &all, &old)) { + /* Disable LDO D to shut down the system */ + if (main_power_15) + regulator_disable(main_power_15); + else + pr_err("regulator not available to shut down system\n"); + (void) sigprocmask(SIG_SETMASK, &old, NULL); + } + return; +} + +/* + * Hog the regulators needed to power up the board. + */ +static int __init u300_init_boardpower(void) +{ + int err; + u32 val; + + pr_info("U300: setting up board power\n"); + main_power_15 = regulator_get(NULL, "vana15"); + if (IS_ERR(main_power_15)) { + pr_err("could not get vana15"); + return PTR_ERR(main_power_15); + } + err = regulator_enable(main_power_15); + if (err) { + pr_err("could not enable vana15\n"); + return err; + } + + /* + * On U300 a special system controller register pulls up the DC + * until the vana15 (LDO D) regulator comes up. At this point, all + * regulators are set and we do not need power control via + * DC ON anymore. This function will likely be moved whenever + * the rest of the U300 power management is implemented. + */ + pr_info("U300: disable system controller pull-up\n"); + val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMCR); + val &= ~U300_SYSCON_PMCR_DCON_ENABLE; + writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMCR); + + /* Register globally exported PM poweroff hook */ + pm_power_off = u300_pm_poweroff; + + return 0; +} + +/* + * So at module init time we hog the regulator! + */ +module_init(u300_init_boardpower); |