fishHEADmaster

1 files changed, 451 insertions, 0 deletions

diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c
new file mode 100644
index 0000000..9d053e2
--- /dev/null
+++ b/drivers/regulator/tps65023-regulator.c
@@ -0,0 +1,451 @@
+/*
+ * 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/slab.h>
+#include <linux/regmap.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)
+
+/* REG_CTRL2 bitfields */
+#define TPS65023_REG_CTRL2_GO		BIT(7)
+#define TPS65023_REG_CTRL2_CORE_ADJ	BIT(6)
+#define TPS65023_REG_CTRL2_DCDC2	BIT(2)
+#define TPS65023_REG_CTRL2_DCDC1	BIT(1)
+#define TPS65023_REG_CTRL2_DCDC3	BIT(0)
+
+/* 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)
+
+/* DCDCs */
+#define TPS65023_DCDC_1			0
+#define TPS65023_DCDC_2			1
+#define TPS65023_DCDC_3			2
+/* LDOs */
+#define TPS65023_LDO_1			3
+#define TPS65023_LDO_2			4
+
+#define TPS65023_MAX_REG_ID		TPS65023_LDO_2
+
+/* Supported voltage values for regulators */
+static const unsigned int VCORE_VSEL_table[] = {
+	800000, 825000, 850000, 875000,
+	900000, 925000, 950000, 975000,
+	1000000, 1025000, 1050000, 1075000,
+	1100000, 1125000, 1150000, 1175000,
+	1200000, 1225000, 1250000, 1275000,
+	1300000, 1325000, 1350000, 1375000,
+	1400000, 1425000, 1450000, 1475000,
+	1500000, 1525000, 1550000, 1600000,
+};
+
+static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
+	3300000,
+};
+
+static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
+	1800000,
+};
+
+/* Supported voltage values for LDO regulators for tps65020 */
+static const unsigned int TPS65020_LDO_VSEL_table[] = {
+	1000000, 1050000, 1100000, 1300000,
+	1800000, 2500000, 3000000, 3300000,
+};
+
+/* Supported voltage values for LDO regulators
+ * for tps65021 and tps65023 */
+static const unsigned int TPS65023_LDO1_VSEL_table[] = {
+	1000000, 1100000, 1300000, 1800000,
+	2200000, 2600000, 2800000, 3150000,
+};
+
+static const unsigned int TPS65023_LDO2_VSEL_table[] = {
+	1050000, 1200000, 1300000, 1800000,
+	2500000, 2800000, 3000000, 3300000,
+};
+
+/* Regulator specific details */
+struct tps_info {
+	const char *name;
+	u8 table_len;
+	const unsigned int *table;
+};
+
+/* PMIC details */
+struct tps_pmic {
+	struct regulator_desc desc[TPS65023_NUM_REGULATOR];
+	struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
+	const struct tps_info *info[TPS65023_NUM_REGULATOR];
+	struct regmap *regmap;
+	u8 core_regulator;
+};
+
+/* Struct passed as driver data */
+struct tps_driver_data {
+	const struct tps_info *info;
+	u8 core_regulator;
+};
+
+static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
+{
+	struct tps_pmic *tps = rdev_get_drvdata(dev);
+	int dcdc = rdev_get_id(dev);
+
+	if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
+		return -EINVAL;
+
+	if (dcdc != tps->core_regulator)
+		return 0;
+
+	return regulator_get_voltage_sel_regmap(dev);
+}
+
+static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
+					 unsigned selector)
+{
+	struct tps_pmic *tps = rdev_get_drvdata(dev);
+	int dcdc = rdev_get_id(dev);
+
+	if (dcdc != tps->core_regulator)
+		return -EINVAL;
+
+	return regulator_set_voltage_sel_regmap(dev, selector);
+}
+
+/* Operations permitted on VDCDCx */
+static struct regulator_ops tps65023_dcdc_ops = {
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.get_voltage_sel = tps65023_dcdc_get_voltage_sel,
+	.set_voltage_sel = tps65023_dcdc_set_voltage_sel,
+	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_ascend,
+};
+
+/* Operations permitted on LDOx */
+static struct regulator_ops tps65023_ldo_ops = {
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_ascend,
+};
+
+static struct regmap_config tps65023_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int tps_65023_probe(struct i2c_client *client,
+				     const struct i2c_device_id *id)
+{
+	const struct tps_driver_data *drv_data = (void *)id->driver_data;
+	const struct tps_info *info = drv_data->info;
+	struct regulator_config config = { };
+	struct regulator_init_data *init_data;
+	struct regulator_dev *rdev;
+	struct tps_pmic *tps;
+	int i;
+	int error;
+
+	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 = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+	if (!tps)
+		return -ENOMEM;
+
+	tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
+	if (IS_ERR(tps->regmap)) {
+		error = PTR_ERR(tps->regmap);
+		dev_err(&client->dev, "Failed to allocate register map: %d\n",
+			error);
+		return error;
+	}
+
+	/* common for all regulators */
+	tps->core_regulator = drv_data->core_regulator;
+
+	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 = i;
+		tps->desc[i].n_voltages = info->table_len;
+		tps->desc[i].volt_table = info->table;
+		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;
+
+		tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
+		switch (i) {
+		case TPS65023_LDO_1:
+			tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
+			tps->desc[i].vsel_mask = 0x07;
+			tps->desc[i].enable_mask = 1 << 1;
+			break;
+		case TPS65023_LDO_2:
+			tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
+			tps->desc[i].vsel_mask = 0x70;
+			tps->desc[i].enable_mask = 1 << 2;
+			break;
+		default: /* DCDCx */
+			tps->desc[i].enable_mask =
+					1 << (TPS65023_NUM_REGULATOR - i);
+			tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
+			tps->desc[i].vsel_mask = info->table_len - 1;
+			tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
+			tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
+		}
+
+		config.dev = &client->dev;
+		config.init_data = init_data;
+		config.driver_data = tps;
+		config.regmap = tps->regmap;
+
+		/* Register the regulators */
+		rdev = regulator_register(&tps->desc[i], &config);
+		if (IS_ERR(rdev)) {
+			dev_err(&client->dev, "failed to register %s\n",
+				id->name);
+			error = PTR_ERR(rdev);
+			goto fail;
+		}
+
+		/* Save regulator for cleanup */
+		tps->rdev[i] = rdev;
+	}
+
+	i2c_set_clientdata(client, tps);
+
+	/* Enable setting output voltage by I2C */
+	regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
+			TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
+
+	return 0;
+
+ fail:
+	while (--i >= 0)
+		regulator_unregister(tps->rdev[i]);
+	return error;
+}
+
+static int 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]);
+	return 0;
+}
+
+static const struct tps_info tps65020_regs[] = {
+	{
+		.name = "VDCDC1",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
+		.table = DCDC_FIXED_3300000_VSEL_table,
+	},
+	{
+		.name = "VDCDC2",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
+		.table = DCDC_FIXED_1800000_VSEL_table,
+	},
+	{
+		.name = "VDCDC3",
+		.table_len = ARRAY_SIZE(VCORE_VSEL_table),
+		.table = VCORE_VSEL_table,
+	},
+	{
+		.name = "LDO1",
+		.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
+		.table = TPS65020_LDO_VSEL_table,
+	},
+	{
+		.name = "LDO2",
+		.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
+		.table = TPS65020_LDO_VSEL_table,
+	},
+};
+
+static const struct tps_info tps65021_regs[] = {
+	{
+		.name = "VDCDC1",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
+		.table = DCDC_FIXED_3300000_VSEL_table,
+	},
+	{
+		.name = "VDCDC2",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
+		.table = DCDC_FIXED_1800000_VSEL_table,
+	},
+	{
+		.name = "VDCDC3",
+		.table_len = ARRAY_SIZE(VCORE_VSEL_table),
+		.table = VCORE_VSEL_table,
+	},
+	{
+		.name = "LDO1",
+		.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
+		.table = TPS65023_LDO1_VSEL_table,
+	},
+	{
+		.name = "LDO2",
+		.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
+		.table = TPS65023_LDO2_VSEL_table,
+	},
+};
+
+static const struct tps_info tps65023_regs[] = {
+	{
+		.name = "VDCDC1",
+		.table_len = ARRAY_SIZE(VCORE_VSEL_table),
+		.table = VCORE_VSEL_table,
+	},
+	{
+		.name = "VDCDC2",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
+		.table = DCDC_FIXED_3300000_VSEL_table,
+	},
+	{
+		.name = "VDCDC3",
+		.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
+		.table = DCDC_FIXED_1800000_VSEL_table,
+	},
+	{
+		.name = "LDO1",
+		.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
+		.table = TPS65023_LDO1_VSEL_table,
+	},
+	{
+		.name = "LDO2",
+		.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
+		.table = TPS65023_LDO2_VSEL_table,
+	},
+};
+
+static struct tps_driver_data tps65020_drv_data = {
+	.info = tps65020_regs,
+	.core_regulator = TPS65023_DCDC_3,
+};
+
+static struct tps_driver_data tps65021_drv_data = {
+	.info = tps65021_regs,
+	.core_regulator = TPS65023_DCDC_3,
+};
+
+static struct tps_driver_data tps65023_drv_data = {
+	.info = tps65023_regs,
+	.core_regulator = TPS65023_DCDC_1,
+};
+
+static const struct i2c_device_id tps_65023_id[] = {
+	{.name = "tps65023",
+	.driver_data = (unsigned long) &tps65023_drv_data},
+	{.name = "tps65021",
+	.driver_data = (unsigned long) &tps65021_drv_data,},
+	{.name = "tps65020",
+	.driver_data = (unsigned long) &tps65020_drv_data},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(i2c, tps_65023_id);
+
+static struct i2c_driver tps_65023_i2c_driver = {
+	.driver = {
+		.name = "tps65023",
+		.owner = THIS_MODULE,
+	},
+	.probe = tps_65023_probe,
+	.remove = tps_65023_remove,
+	.id_table = tps_65023_id,
+};
+
+static int __init tps_65023_init(void)
+{
+	return i2c_add_driver(&tps_65023_i2c_driver);
+}
+subsys_initcall(tps_65023_init);
+
+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("GPL v2");