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Subject[PATCH 2/2] U300 AB3100 boardinfo v3
Date
This defines regulator platform data and board power
regulator hogs for the ST-Ericsson U300 platform.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
---
ChangeLog v2->v3

- Set constraints to always_on = 1 for the always-on
regulators, remove all regulator hogs except for the
vana15 line which is used for shutting down the system.

- Set sensible voltage limits for the always-on regulators.
The default values written during driver loading will be
used but let us put in some actual limits.

- Adjust board data to new structure of the regulator driver.
---
arch/arm/mach-u300/Makefile | 1 +
arch/arm/mach-u300/i2c.c | 287 ++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-u300/regulator.c | 88 ++++++++++++
3 files changed, 376 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-u300/regulator.c

diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
index 885b5c0..fab46fe 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 10be1f8..ddd03cc 100644
--- a/arch/arm/mach-u300/i2c.c
+++ b/arch/arm/mach-u300/i2c.c
@@ -9,13 +9,295 @@
*/
#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
+
+/*
+ * This is the consumer for the on-board devices that should
+ * never be powered off.
+ */
+static struct regulator_consumer_supply supply_ldo_a[] = {
+ {
+ .dev = NULL,
+ .supply = "vrad", /* Powers the radio */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_c[] = {
+ {
+ .dev_name = "ab3100-codec",
+ .supply = "vaudio", /* Powers the codec */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_d[] = {
+ {
+ .dev = NULL,
+ .supply = "vana15", /* Powers the SoC (CPU etc) */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_e[] = {
+ {
+ .dev = NULL,
+ .supply = "vio", /* Powers the I/O peripherals */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_e_sleep[] = {
+ {
+ .dev = NULL,
+ .supply = "vioslp", /* Powers the I/O peripherals in sleep */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_f[] = {
+ {
+ .dev = NULL,
+ .supply = "vana25", /* Powers the SoC (CPU etc) */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_g[] = {
+ {
+ .dev_name = "mmci",
+ .supply = "vcard", /* 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 */
+ },
+};
+
+static struct regulator_consumer_supply supply_ldo_ext[] = {
+ {
+ .dev = NULL,
+ .supply = "vext", /* External power */
+ },
+};
+
+static struct regulator_consumer_supply supply_buck[] = {
+ {
+ .dev = NULL,
+ .supply = "vcore", /* Powers the SoC CPU etc */
+ },
+};
+
+static struct regulator_consumer_supply supply_buck_sleep[] = {
+ {
+ .dev = NULL,
+ .supply = "vcoreslp", /* Powers the SoC CPU etc in sleep */
+ },
+};
+
+
+/* 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 = {
+ .min_uV = LDO_A_VOLTAGE,
+ .max_uV = LDO_A_VOLTAGE,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL,
+ .always_on = 1,
+ .boot_on = 1,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(supply_ldo_a),
+ .consumer_supplies = supply_ldo_a,
+ },
+ /* 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,
+ .boot_on = 1,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(supply_ldo_d),
+ .consumer_supplies = supply_ldo_d,
+ },
+ /* LDO E routing and constraints */
+ {
+ .constraints = {
+ .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,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(supply_ldo_e),
+ .consumer_supplies = supply_ldo_e,
+ },
+ /* LDO F routing and constraints */
+ {
+ .constraints = {
+ .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,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(supply_ldo_f),
+ .consumer_supplies = supply_ldo_f,
+ },
+ /* LDO G routing and constraints */
+ {
+ .constraints = {
+ .min_uV = 0,
+ .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 = 0,
+ .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 = 0,
+ .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 = {
+ .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,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(supply_buck),
+ .consumer_supplies = supply_buck,
+ },
+ },
+ .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 +320,11 @@ 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 0000000..9c53f01
--- /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);
--
1.6.2.1


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