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Message-Id: <1249658726-10769-1-git-send-email-anuj.aggarwal@ti.com>
Date: Fri, 7 Aug 2009 20:55:26 +0530
From: Anuj Aggarwal <anuj.aggarwal@...com>
To: broonie@...ena.org.uk, lrg@...mlogic.co.uk,
linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Anuj Aggarwal <anuj.aggarwal@...com>
Subject: [PATCH 1/8] Regulator: Add TPS65023 regulator driver
Adding support for TI TPS65023 regulator driver
Signed-off-by: Anuj Aggarwal <anuj.aggarwal@...com>
---
drivers/regulator/tps65023-regulator.c | 496 ++++++++++++++++++++++++++++++++
1 files changed, 496 insertions(+), 0 deletions(-)
create mode 100644 drivers/regulator/tps65023-regulator.c
diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c
new file mode 100644
index 0000000..d112cbc
--- /dev/null
+++ b/drivers/regulator/tps65023-regulator.c
@@ -0,0 +1,496 @@
+/*
+ * tps65023-regulator.c
+ *
+ * Supports TPS65023 Regulator
+ *
+ * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#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>
+#include <linux/regulator/tps65023.h>
+
+struct tps_info {
+ const char *name;
+ unsigned min_uV;
+ unsigned max_uV;
+ bool fixed;
+ u8 table_len;
+ const u16 *table;
+};
+
+struct tps_pmic {
+ 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_pmic *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_pmic *tps, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(tps->client, reg, val);
+}
+
+static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ err = tps_65023_read_reg(tps, reg, &data);
+ if (err) {
+ pr_err("Read from reg 0x%x failed\n", reg);
+ return err;
+ }
+
+ data |= mask;
+
+ return tps_65023_write_reg(tps, reg, data);
+}
+
+static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ err = tps_65023_read_reg(tps, reg, &data);
+ if (err) {
+ pr_err("Read from reg 0x%x failed\n", reg);
+ return err;
+ }
+
+ data &= ~mask;
+
+ return tps_65023_write_reg(tps, reg, data);
+}
+
+static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int dcdc = rdev_get_id(dev);
+ int ret;
+ u8 shift;
+
+ if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
+ return -EINVAL;
+
+ shift = TPS65023_NUM_REGULATOR - dcdc;
+ ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl);
+
+ if (ret == 0) {
+ reg_ctrl &= (1 << shift);
+ return reg_ctrl ? 1 : 0;
+ } else
+ return ret;
+}
+
+static int tps65023_ldo_is_enabled(struct regulator_dev *dev)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int ldo = rdev_get_id(dev);
+ int ret;
+ u8 shift;
+ unsigned char reg_ctrl;
+
+ if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
+ return -EINVAL;
+
+ shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
+ ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl);
+
+ if (ret == 0) {
+ reg_ctrl &= (1 << shift);
+ return reg_ctrl ? 1 : 0;
+ } else
+ return ret;
+}
+
+static int tps65023_dcdc_enable(struct regulator_dev *dev)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int dcdc = rdev_get_id(dev);
+ u8 shift;
+
+ if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
+ return -EINVAL;
+
+ shift = TPS65023_NUM_REGULATOR - dcdc;
+ return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
+}
+
+static int tps65023_dcdc_disable(struct regulator_dev *dev)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int dcdc = rdev_get_id(dev);
+ u8 shift;
+
+ if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
+ return -EINVAL;
+
+ shift = TPS65023_NUM_REGULATOR - dcdc;
+ return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
+}
+
+static int tps65023_ldo_enable(struct regulator_dev *dev)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int ldo = rdev_get_id(dev);
+ u8 shift;
+
+ if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
+ return -EINVAL;
+
+ shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
+ return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
+}
+
+static int tps65023_ldo_disable(struct regulator_dev *dev)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int ldo = rdev_get_id(dev);
+ u8 shift;
+
+ if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
+ return -EINVAL;
+
+ shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
+ return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
+}
+
+static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int dcdc = rdev_get_id(dev);
+ int ret;
+
+ if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
+ return -EINVAL;
+
+ if (dcdc == TPS65023_DCDC_1) {
+ ret = tps_65023_read_reg(tps, TPS65023_REG_DEF_CORE, ®_ctrl);
+ if (ret < 0)
+ return ret;
+ reg_ctrl &= (tps->info[dcdc]->table_len - 1);
+ return tps->info[dcdc]->table[reg_ctrl] * 1000;
+ } else
+ return tps->info[dcdc]->min_uV;
+}
+
+static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int dcdc = rdev_get_id(dev);
+ int vsel;
+
+ if (dcdc != TPS65023_DCDC_1)
+ return -EINVAL;
+
+ if (min_uV < tps->info[dcdc]->min_uV
+ || min_uV > tps->info[dcdc]->max_uV)
+ return -EINVAL;
+ if (max_uV < tps->info[dcdc]->min_uV
+ || max_uV > tps->info[dcdc]->max_uV)
+ return -EINVAL;
+
+ for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
+ int mV = tps->info[dcdc]->table[vsel];
+ int uV = mV * 1000;
+
+ /* Break at the first in-range value */
+ if (min_uV <= uV && uV <= max_uV)
+ break;
+ }
+
+ /* write to the register */
+ return tps_65023_write_reg(tps, TPS65023_REG_DEF_CORE, vsel);
+}
+
+static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
+{
+ unsigned char reg_ctrl;
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int ldo = rdev_get_id(dev);
+ int ret;
+
+ if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
+ return -EINVAL;
+
+ ret = tps_65023_read_reg(tps, TPS65023_REG_LDO_CTRL, ®_ctrl);
+ if (ret < 0)
+ return ret;
+
+ reg_ctrl >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
+ reg_ctrl &= (tps->info[ldo]->table_len - 1);
+ return tps->info[ldo]->table[reg_ctrl] * 1000;
+}
+
+static int tps65023_ldo_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV)
+{
+ struct tps_pmic *tps = rdev_get_drvdata(dev);
+ int ldo = rdev_get_id(dev);
+ int vsel;
+ int ret;
+ unsigned char reg_ctrl;
+
+ if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
+ return -EINVAL;
+
+ if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
+ return -EINVAL;
+ if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
+ return -EINVAL;
+
+ for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
+ int mV = tps->info[ldo]->table[vsel];
+ int uV = mV * 1000;
+
+ /* Break at the first in-range value */
+ if (min_uV <= uV && uV <= max_uV)
+ break;
+ }
+
+ ret = tps_65023_read_reg(tps, TPS65023_REG_LDO_CTRL, ®_ctrl);
+
+ if (ret < 0)
+ return ret;
+
+ reg_ctrl &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1);
+ reg_ctrl |=
+ (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)));
+ return tps_65023_write_reg(tps, TPS65023_REG_LDO_CTRL, reg_ctrl);
+}
+
+/* Operations permitted on VDCDCx */
+static struct regulator_ops tps65023_dcdc_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,
+};
+
+/* Operations permitted on LDOx */
+static struct regulator_ops tps65023_ldo_ops = {
+ .is_enabled = tps65023_ldo_is_enabled,
+ .enable = tps65023_ldo_enable,
+ .disable = tps65023_ldo_disable,
+ .get_voltage = tps65023_ldo_get_voltage,
+ .set_voltage = tps65023_ldo_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_pmic *tps;
+ int i;
+
+ 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 = (i > TPS65023_DCDC_3 ?
+ &tps65023_ldo_ops : &tps65023_dcdc_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_pmic *tps = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
+ regulator_unregister(tps->rdev[i]);
+
+ tps->client = NULL;
+
+ /* 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,
+};
+
+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 = 1050000,
+ .max_uV = 3300000,
+ .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);
+}
+subsys_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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