Added regulator driver for TPS65023 and modified the Kconfig and Makefile for
the same.
Signed-off-by: Anuj Aggarwal <anuj.aggarwal@xxxxxx>
---
drivers/regulator/Kconfig | 8 +
drivers/regulator/Makefile | 1 +
drivers/regulator/tps65023-regulator.c | 510 ++++++++++++++++++++++++++++++++
3 files changed, 519 insertions(+), 0 deletions(-)
create mode 100644 drivers/regulator/tps65023-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index e58c0ce..28109e1 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -91,4 +91,12 @@ config REGULATOR_PCF50633
Say Y here to support the voltage regulators and convertors
on PCF50633
+config REGULATOR_TPS65023
+ tristate "TI TPS65023 Power regulators"
+ depends on OMAP3EVM_TPS65023
+ help
+ This driver supports TPS65023 voltage regulator chips. TPS65023 provides
+ three step-down converters and two general-purpose LDO voltage regulators.
+ It supports TI's software based Class-2 SmartReflex implementation.
+
endif
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index c0d87bf..28235b9 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -13,5 +13,6 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c
new file mode 100644
index 0000000..657c0c3
--- /dev/null
+++ b/drivers/regulator/tps65023-regulator.c
@@ -0,0 +1,510 @@
+/*
+ * tps65023-regulator.c -- Supports TPS65023 regulator
+ *
+ * Author : Anuj Aggarwal<anuj.aggarwal@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+
+/* Register definitions */
+#define TPS65023_REG_VERSION 0
+#define TPS65023_REG_PGOODZ 1
+#define TPS65023_REG_MASK 2
+#define TPS65023_REG_REG_CTRL 3
+#define TPS65023_REG_CON_CTRL 4
+#define TPS65023_REG_CON_CTRL2 5
+#define TPS65023_REG_DEF_CORE 6
+#define TPS65023_REG_DEFSLEW 7
+#define TPS65023_REG_LDO_CTRL 8
+
+/* PGOODZ bitfields */
+#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
+#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
+#define TPS65023_PGOODZ_VDCDC1 BIT(5)
+#define TPS65023_PGOODZ_VDCDC2 BIT(4)
+#define TPS65023_PGOODZ_VDCDC3 BIT(3)
+#define TPS65023_PGOODZ_LDO2 BIT(2)
+#define TPS65023_PGOODZ_LDO1 BIT(1)
+
+/* MASK bitfields */
+#define TPS65023_MASK_PWRFAILZ BIT(7)
+#define TPS65023_MASK_LOWBATTZ BIT(6)
+#define TPS65023_MASK_VDCDC1 BIT(5)
+#define TPS65023_MASK_VDCDC2 BIT(4)
+#define TPS65023_MASK_VDCDC3 BIT(3)
+#define TPS65023_MASK_LDO2 BIT(2)
+#define TPS65023_MASK_LDO1 BIT(1)
+
+/* REG_CTRL bitfields */
+#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
+#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
+#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
+#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
+#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
+
+/* LDO_CTRL bitfields */
+#define TPS65023_LDO_CTRL_LDOx_SHIFT 4
+#define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0xF0 >> (ldo_id*4))
+
+/* Number of step-down converters available */
+#define TPS65023_NUM_DCDC 3
+/* Number of LDO voltage regulators available */
+#define TPS65023_NUM_LDO 2
+/* Number of total regulators available */
+#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
+
+struct tps_info {
+ const char *name;
+ unsigned min_uV;
+ unsigned max_uV;
+ bool fixed;
+ u8 table_len;
+ const u16 *table;
+};
+
+struct tps {
+ struct regulator_desc desc[TPS65023_NUM_REGULATOR];
+ struct i2c_client *client;
+ struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
+ const struct tps_info *info[TPS65023_NUM_REGULATOR];
+};
+
+static inline int tps_65023_read_reg(struct tps *tps, u8 reg, u8 *val)
+{
+ int status;
+
+ status = i2c_smbus_read_byte_data(tps->client, reg);
+ *val = status;
+ if (status < 0)
+ return status;
+ return 0;
+}
+
+static inline int tps_65023_write_reg(struct tps *tps, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(tps->client, reg, val);
+}
+
+static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+ int ret;
+
+ ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl);
+
+ if (ret == 0) {
+ switch (regulator_id) {
+ case 0:
+ reg_ctrl &= TPS65023_REG_CTRL_VDCDC1_EN;
+ break;
+
+ case 1:
+ reg_ctrl &= TPS65023_REG_CTRL_VDCDC2_EN;
+ break;
+
+ case 2:
+ reg_ctrl &= TPS65023_REG_CTRL_VDCDC3_EN;
+ break;
+
+ case 3:
+ reg_ctrl &= TPS65023_REG_CTRL_LDO1_EN;
+ break;
+
+ case 4:
+ reg_ctrl &= TPS65023_REG_CTRL_LDO2_EN;
+ break;
+
+ default:
+ /* error message */
+ break;
+ }
+ }
+
+ if (ret == 0)
+ return reg_ctrl ? 1 : 0;
+ else
+ return ret;
+}
+
+static int tps65023_dcdc_enable(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+ int ret;
+
+ ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl);
+
+ if (ret == 0) {
+ switch (regulator_id) {
+ case 0:
+ reg_ctrl |= TPS65023_REG_CTRL_VDCDC1_EN;
+ break;
+
+ case 1:
+ reg_ctrl |= TPS65023_REG_CTRL_VDCDC2_EN;
+ break;
+
+ case 2:
+ reg_ctrl |= TPS65023_REG_CTRL_VDCDC3_EN;
+ break;
+
+ case 3:
+ reg_ctrl |= TPS65023_REG_CTRL_LDO1_EN;
+ break;
+
+ case 4:
+ reg_ctrl |= TPS65023_REG_CTRL_LDO2_EN;
+ break;
+
+ default:
+ /* error message */
+ break;
+ }
+ }
+
+ if (ret == 0)
+ return tps_65023_write_reg(tps, TPS65023_REG_REG_CTRL,
+ reg_ctrl);
+ else
+ return ret;
+}
+
+static int tps65023_dcdc_disable(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+ int ret;
+
+ ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl);
+
+ if (ret == 0) {
+ switch (regulator_id) {
+ case 0:
+ reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC1_EN);
+ break;
+
+ case 1:
+ reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC2_EN);
+ break;
+
+ case 2:
+ reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC3_EN);
+ break;
+
+ case 3:
+ reg_ctrl &= ~(TPS65023_REG_CTRL_LDO1_EN);
+ break;
+
+ case 4:
+ reg_ctrl &= ~(TPS65023_REG_CTRL_LDO2_EN);
+ break;
+
+ default:
+ /* error message */
+ break;
+ }
+ }
+
+ if (ret == 0)
+ return tps_65023_write_reg(tps, TPS65023_REG_REG_CTRL,
+ reg_ctrl);
+ else
+ return ret;
+}
+
+static int tps65023_fixed_get_voltage(struct regulator_dev *dev)
+{
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+
+ return tps->info[regulator_id]->min_uV;
+}
+
+static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+ u8 reg;
+ int ret;
+
+ /* Choose the control register according to the regulator */
+ reg = (regulator_id ? TPS65023_REG_LDO_CTRL : TPS65023_REG_DEF_CORE);
+ ret = tps_65023_read_reg(tps, reg, ®_ctrl);
+ if (ret < 0)
+ return ret;
+
+ if (regulator_id) {
+ /* Select between LDO 1 and 2 */
+ int ldo_id = regulator_id - TPS65023_NUM_DCDC;
+
+ reg_ctrl >>= (TPS65023_LDO_CTRL_LDOx_SHIFT * ldo_id);
+ reg_ctrl &= (tps->info[regulator_id]->table_len - 1);
+ return tps->info[regulator_id]->table[reg_ctrl] * 1000;
+ } else {
+ /* VDCDC1 */
+ reg_ctrl &= (tps->info[regulator_id]->table_len - 1);
+ return tps->info[regulator_id]->table[reg_ctrl] * 1000;
+ }
+}
+
+static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV)
+{
+ struct tps *tps = rdev_get_drvdata(dev);
+ int regulator_id = rdev_get_id(dev);
+ u8 reg;
+ int vsel;
+
+ /* Choose the control register according to the regulator */
+ reg = (regulator_id ? TPS65023_REG_LDO_CTRL : TPS65023_REG_DEF_CORE);
+
+ for (vsel = 0; vsel < tps->info[regulator_id]->table_len; vsel++) {
+ int mV = tps->info[regulator_id]->table[vsel];
+ int uV = mV * 1000;
+
+ /* Break at the first in-range value */
+ if (min_uV <= uV && uV <= max_uV)
+ break;
+ }
+
+ if (regulator_id) {
+ /* LDO 1 or 2 */
+ int ret;
+ unsigned char reg_ctrl;
+ int ldo_id = regulator_id - TPS65023_NUM_DCDC;
+
+ ret = tps_65023_read_reg(tps, reg, ®_ctrl);
+ if (ret < 0)
+ return ret;
+
+ reg_ctrl &= TPS65023_LDO_CTRL_LDOx_MASK(ldo_id);
+ reg_ctrl |= (vsel << (ldo_id * TPS65023_LDO_CTRL_LDOx_SHIFT));
+ return tps_65023_write_reg(tps, reg, reg_ctrl);
+ } else {
+ /* VDCDC1 */
+ return tps_65023_write_reg(tps, reg, vsel);
+ }
+}
+
+/* Voltage set is not permitted on VDCDC2/3 */
+static struct regulator_ops tps65023_fixed_ops = {
+ .is_enabled = tps65023_dcdc_is_enabled,
+ .enable = tps65023_dcdc_enable,
+ .disable = tps65023_dcdc_disable,
+ .get_voltage = tps65023_fixed_get_voltage,
+};
+
+/* Operations permitted on VDCDC1 and LDO1/2 */
+static struct regulator_ops tps65023_adjustable_ops = {
+ .is_enabled = tps65023_dcdc_is_enabled,
+ .enable = tps65023_dcdc_enable,
+ .disable = tps65023_dcdc_disable,
+ .get_voltage = tps65023_dcdc_get_voltage,
+ .set_voltage = tps65023_dcdc_set_voltage,
+};
+
+static
+int tps_65023_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ static int desc_id;
+ const struct tps_info *info = (void *)id->driver_data;
+ struct regulator_init_data *init_data;
+ struct regulator_dev *rdev;
+ struct tps *tps;
+ int i;
+ int num_regulators = 0;
+ unsigned char reg_val;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ /**
+ * init_data points to array of regulator_init structures
+ * coming from the board-evm file.
+ */
+ init_data = client->dev.platform_data;
+
+ if (!init_data)
+ return -EIO;
+
+ tps = kzalloc(sizeof(*tps), GFP_KERNEL);
+ if (!tps)
+ return -ENOMEM;
+
+ tps->client = client;
+
+ for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
+ /* Store regulator specific information */
+ tps->info[i] = info;
+
+ tps->desc[i].name = info->name;
+ tps->desc[i].id = desc_id++;
+ tps->desc[i].ops = (info->fixed ? &tps65023_fixed_ops
+ : &tps65023_adjustable_ops);
+ tps->desc[i].type = REGULATOR_VOLTAGE;
+ tps->desc[i].owner = THIS_MODULE;
+
+ /* Register the regulators */
+ rdev = regulator_register(&tps->desc[i], &client->dev,
+ init_data, tps);
+ if (IS_ERR(rdev)) {
+ dev_err(&client->dev, "failed to register %s\n",
+ id->name);
+ kfree(tps);
+ return PTR_ERR(rdev);
+ }
+
+ /* Save regulator for cleanup */
+ tps->rdev[i] = rdev;
+ }
+
+ i2c_set_clientdata(client, tps);
+
+ return 0;
+}
+
+/**
+ * tps_65023_remove - TPS65023 driver i2c remove handler
+ * @client: i2c driver client device structure
+ *
+ * Unregister TPS driver as an i2c client device driver
+ */
+static int __devexit tps_65023_remove(struct i2c_client *client)
+{
+ struct tps *tps = i2c_get_clientdata(client);
+
+ regulator_unregister(tps->rdev);
+ /* clear the client data in i2c */
+ i2c_set_clientdata(client, NULL);
+ kfree(tps);
+
+ return 0;
+}
+
+/* Supported voltage values for regulators */
+static const u16 VDCDC1_VSEL_table[] = {
+ 800, 825, 850, 875,
+ 900, 925, 950, 975,
+ 1000, 1025, 1050, 1075,
+ 1100, 1125, 1150, 1175,
+ 1200, 1225, 1250, 1275,
+ 1300, 1325, 1350, 1375,
+ 1400, 1425, 1450, 1475,
+ 1500, 1525, 1550, 1600,
+};
+
+static const u16 LDO1_VSEL_table[] = {
+ 1000, 1100, 1300, 1800,
+ 2200, 2600, 2800, 3150,
+ };
+
+static const u16 LDO2_VSEL_table[] = {
+ 1050, 1200, 1300, 1800,
+ 2500, 2800, 3000, 3300,
+ };
+
+/*
+ * These regulators have the same register structure, and differ
+ * primarily according to supported voltages and default settings.
+ */
+static const struct tps_info tps65023_regs[] = {
+ {
+ .name = "VDCDC1",
+ .min_uV = 800000,
+ .max_uV = 1600000,
+ .fixed = 0,
+ .table_len = ARRAY_SIZE(VDCDC1_VSEL_table),
+ .table = VDCDC1_VSEL_table,
+ },
+ {
+ .name = "VDCDC2",
+ .min_uV = 3300000,
+ .max_uV = 3300000,
+ .fixed = 1,
+ .table_len = 0,
+ },
+ {
+ .name = "VDCDC3",
+ .min_uV = 1800000,
+ .max_uV = 1800000,
+ .fixed = 1,
+ .table_len = 0,
+ },
+ {
+ .name = "LDO1",
+ .min_uV = 1000000,
+ .max_uV = 3150000,
+ .fixed = 0,
+ .table_len = ARRAY_SIZE(LDO1_VSEL_table),
+ .table = LDO1_VSEL_table,
+ },
+ {
+ .name = "LDO2",
+ .min_uV = 1000000,
+ .max_uV = 3150000,
+ .fixed = 0,
+ .table_len = ARRAY_SIZE(LDO2_VSEL_table),
+ .table = LDO2_VSEL_table,
+ },
+};
+
+static const struct i2c_device_id tps_65023_id = {
+ .name = "tps65023",
+ .driver_data = (unsigned long) &tps65023_regs[0],
+};
+
+MODULE_DEVICE_TABLE(i2c, tps_65023_id);
+
+static struct i2c_driver tps_65023_i2c_driver = {
+ .driver = {
+ .name = "tps_65023_pwr",
+ .owner = THIS_MODULE,
+ },
+ .probe = tps_65023_probe,
+ .remove = __devexit_p(tps_65023_remove),
+ .id_table = &tps_65023_id,
+};
+
+/**
+ * tps_65023_init
+ *
+ * Module init function
+ */
+static int __init tps_65023_init(void)
+{
+ return i2c_add_driver(&tps_65023_i2c_driver);
+}
+late_initcall(tps_65023_init);
+
+/**
+ * tps_65023_cleanup
+ *
+ * Module exit function
+ */
+static void __exit tps_65023_cleanup(void)
+{
+ i2c_del_driver(&tps_65023_i2c_driver);
+}
+module_exit(tps_65023_cleanup);
+
+MODULE_AUTHOR("Texas Instruments");
+MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
+MODULE_LICENSE("GPLv2");
--
1.6.2.4
--
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