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ARM: 5724/1: U300 AB3100 boardinfo v5
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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>
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Linus Walleij authored and Russell King committed Oct 19, 2009
1 parent 2fdc246 commit 3d81277
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1 change: 1 addition & 0 deletions arch/arm/mach-u300/Makefile
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Expand Up @@ -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
248 changes: 248 additions & 0 deletions arch/arm/mach-u300/i2c.c
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Expand Up @@ -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,
},
};

Expand All @@ -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));
}
88 changes: 88 additions & 0 deletions arch/arm/mach-u300/regulator.c
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@@ -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);

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