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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>
This commit is contained in:
Linus Walleij
Russell King
parent
2fdc246aaf
commit
3d81277b65
3 changed files with 337 additions and 0 deletions
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@ -12,3 +12,4 @@ obj-$(CONFIG_MMC) += mmc.o
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obj-$(CONFIG_SPI_PL022) += spi.o
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obj-$(CONFIG_MACH_U300_SPIDUMMY) += dummyspichip.o
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obj-$(CONFIG_I2C_STU300) += i2c.o
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obj-$(CONFIG_REGULATOR_AB3100) += regulator.o
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@ -9,13 +9,256 @@
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*/
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#include <linux/kernel.h>
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#include <linux/i2c.h>
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#include <linux/mfd/ab3100.h>
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#include <linux/regulator/machine.h>
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#include <linux/amba/bus.h>
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#include <mach/irqs.h>
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/*
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* Initial settings of ab3100 registers.
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* Common for below LDO regulator settings are that
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* bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0).
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* Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode.
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*/
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/* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */
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#define LDO_A_SETTING 0x16
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/* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */
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#define LDO_C_SETTING 0x10
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/* LDO_D 0x10: 2.65V, ON, sleep mode not used */
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#define LDO_D_SETTING 0x10
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/* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */
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#define LDO_E_SETTING 0x10
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/* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */
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#define LDO_E_SLEEP_SETTING 0x00
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/* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */
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#define LDO_F_SETTING 0xD0
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/* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */
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#define LDO_G_SETTING 0x00
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/* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */
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#define LDO_H_SETTING 0x18
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/* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */
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#define LDO_K_SETTING 0x00
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/* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */
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#define LDO_EXT_SETTING 0x00
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/* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */
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#define BUCK_SETTING 0x7D
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/* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */
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#define BUCK_SLEEP_SETTING 0xAC
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static struct regulator_consumer_supply supply_ldo_c[] = {
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{
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.dev_name = "ab3100-codec",
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.supply = "vaudio", /* Powers the codec */
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},
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};
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/*
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* This one needs to be a supply so we can turn it off
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* in order to shut down the system.
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*/
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static struct regulator_consumer_supply supply_ldo_d[] = {
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{
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.dev = NULL,
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.supply = "vana15", /* Powers the SoC (CPU etc) */
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},
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};
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static struct regulator_consumer_supply supply_ldo_g[] = {
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{
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.dev_name = "mmci",
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.supply = "vmmc", /* Powers MMC/SD card */
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},
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};
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static struct regulator_consumer_supply supply_ldo_h[] = {
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{
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.dev_name = "xgam_pdi",
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.supply = "vdisp", /* Powers camera, display etc */
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},
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};
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static struct regulator_consumer_supply supply_ldo_k[] = {
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{
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.dev_name = "irda",
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.supply = "vir", /* Power IrDA */
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},
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};
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/*
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* This is a placeholder for whoever wish to use the
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* external power.
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*/
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static struct regulator_consumer_supply supply_ldo_ext[] = {
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{
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.dev = NULL,
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.supply = "vext", /* External power */
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},
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};
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/* Preset (hardware defined) voltages for these regulators */
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#define LDO_A_VOLTAGE 2750000
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#define LDO_C_VOLTAGE 2650000
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#define LDO_D_VOLTAGE 2650000
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static struct ab3100_platform_data ab3100_plf_data = {
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.reg_constraints = {
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/* LDO A routing and constraints */
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{
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.constraints = {
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.name = "vrad",
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.min_uV = LDO_A_VOLTAGE,
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.max_uV = LDO_A_VOLTAGE,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.always_on = 1,
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.boot_on = 1,
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},
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},
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/* LDO C routing and constraints */
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{
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.constraints = {
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.min_uV = LDO_C_VOLTAGE,
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.max_uV = LDO_C_VOLTAGE,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_c),
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.consumer_supplies = supply_ldo_c,
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},
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/* LDO D routing and constraints */
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{
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.constraints = {
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.min_uV = LDO_D_VOLTAGE,
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.max_uV = LDO_D_VOLTAGE,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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/*
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* Actually this is boot_on but we need
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* to reference count it externally to
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* be able to shut down the system.
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*/
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
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.consumer_supplies = supply_ldo_d,
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},
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/* LDO E routing and constraints */
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{
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.constraints = {
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.name = "vio",
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.min_uV = 1800000,
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.max_uV = 1800000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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.always_on = 1,
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.boot_on = 1,
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},
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},
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/* LDO F routing and constraints */
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{
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.constraints = {
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.name = "vana25",
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.min_uV = 2500000,
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.max_uV = 2500000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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.always_on = 1,
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.boot_on = 1,
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},
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},
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/* LDO G routing and constraints */
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{
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.constraints = {
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.min_uV = 1500000,
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.max_uV = 2850000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_g),
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.consumer_supplies = supply_ldo_g,
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},
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/* LDO H routing and constraints */
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{
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.constraints = {
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.min_uV = 1200000,
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.max_uV = 2750000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_h),
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.consumer_supplies = supply_ldo_h,
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},
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/* LDO K routing and constraints */
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{
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.constraints = {
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.min_uV = 1800000,
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.max_uV = 2750000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_k),
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.consumer_supplies = supply_ldo_k,
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},
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/* External regulator interface. No fixed voltage specified.
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* If we knew the voltage of the external regulator and it
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* was connected on the board, we could add the (fixed)
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* voltage for it here.
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*/
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{
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.constraints = {
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.min_uV = 0,
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.max_uV = 0,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_STATUS,
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},
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.num_consumer_supplies = ARRAY_SIZE(supply_ldo_ext),
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.consumer_supplies = supply_ldo_ext,
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},
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/* Buck converter routing and constraints */
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{
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.constraints = {
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.name = "vcore",
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.min_uV = 1200000,
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.max_uV = 1800000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask =
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_STATUS,
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.always_on = 1,
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.boot_on = 1,
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},
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},
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},
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.reg_initvals = {
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LDO_A_SETTING,
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LDO_C_SETTING,
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LDO_E_SETTING,
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LDO_E_SLEEP_SETTING,
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LDO_F_SETTING,
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LDO_G_SETTING,
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LDO_H_SETTING,
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LDO_K_SETTING,
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LDO_EXT_SETTING,
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BUCK_SETTING,
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BUCK_SLEEP_SETTING,
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LDO_D_SETTING,
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},
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};
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static struct i2c_board_info __initdata bus0_i2c_board_info[] = {
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{
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.type = "ab3100",
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.addr = 0x48,
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.irq = IRQ_U300_IRQ0_EXT,
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.platform_data = &ab3100_plf_data,
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},
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};
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@ -38,6 +281,11 @@ void __init u300_i2c_register_board_devices(void)
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{
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i2c_register_board_info(0, bus0_i2c_board_info,
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ARRAY_SIZE(bus0_i2c_board_info));
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/*
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* This makes the core shut down all unused regulators
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* after all the initcalls have completed.
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*/
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regulator_has_full_constraints();
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i2c_register_board_info(1, bus1_i2c_board_info,
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ARRAY_SIZE(bus1_i2c_board_info));
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}
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88
arch/arm/mach-u300/regulator.c
Normal file
88
arch/arm/mach-u300/regulator.c
Normal file
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@ -0,0 +1,88 @@
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/*
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* arch/arm/mach-u300/regulator.c
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*
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* Copyright (C) 2009 ST-Ericsson AB
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* License terms: GNU General Public License (GPL) version 2
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* Handle board-bound regulators and board power not related
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* to any devices.
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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*/
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#include <linux/device.h>
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#include <linux/signal.h>
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#include <linux/err.h>
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#include <linux/regulator/consumer.h>
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/* Those are just for writing in syscon */
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <mach/syscon.h>
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/*
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* Regulators that power the board and chip and which are
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* not copuled to specific drivers are hogged in these
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* instances.
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*/
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static struct regulator *main_power_15;
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/*
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* This function is used from pm.h to shut down the system by
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* resetting all regulators in turn and then disable regulator
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* LDO D (main power).
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*/
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void u300_pm_poweroff(void)
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{
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sigset_t old, all;
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sigfillset(&all);
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if (!sigprocmask(SIG_BLOCK, &all, &old)) {
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/* Disable LDO D to shut down the system */
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if (main_power_15)
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regulator_disable(main_power_15);
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else
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pr_err("regulator not available to shut down system\n");
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(void) sigprocmask(SIG_SETMASK, &old, NULL);
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}
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return;
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}
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/*
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* Hog the regulators needed to power up the board.
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*/
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static int __init u300_init_boardpower(void)
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{
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int err;
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u32 val;
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pr_info("U300: setting up board power\n");
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main_power_15 = regulator_get(NULL, "vana15");
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if (IS_ERR(main_power_15)) {
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pr_err("could not get vana15");
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return PTR_ERR(main_power_15);
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}
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err = regulator_enable(main_power_15);
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if (err) {
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pr_err("could not enable vana15\n");
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return err;
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}
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/*
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* On U300 a special system controller register pulls up the DC
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* until the vana15 (LDO D) regulator comes up. At this point, all
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* regulators are set and we do not need power control via
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* DC ON anymore. This function will likely be moved whenever
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* the rest of the U300 power management is implemented.
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*/
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pr_info("U300: disable system controller pull-up\n");
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMCR);
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val &= ~U300_SYSCON_PMCR_DCON_ENABLE;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMCR);
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/* Register globally exported PM poweroff hook */
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pm_power_off = u300_pm_poweroff;
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return 0;
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}
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/*
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* So at module init time we hog the regulator!
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*/
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module_init(u300_init_boardpower);
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