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-rw-r--r--arch/arm/mach-u300/i2c.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/i2c.c b/arch/arm/mach-u300/i2c.c
index 10be1f888b27..c73ed06b6065 100644
--- a/arch/arm/mach-u300/i2c.c
+++ b/arch/arm/mach-u300/i2c.c
@@ -9,13 +9,257 @@
*/
#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,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ /*
+ * 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 +282,11 @@ 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));
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.