Initial import

1 files changed, 543 insertions, 0 deletions

diff --git a/drivers/regulator/act8865-regulator.c b/drivers/regulator/act8865-regulator.c
new file mode 100644
index 000000000..2ff73d72c
--- /dev/null
+++ b/drivers/regulator/act8865-regulator.c
@@ -0,0 +1,543 @@
+/*
+ * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
+ *
+ * http://www.active-semi.com/products/power-management-units/act88xx/
+ *
+ * Copyright (C) 2013 Atmel Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/act8865.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+
+/*
+ * ACT8600 Global Register Map.
+ */
+#define ACT8600_SYS_MODE	0x00
+#define ACT8600_SYS_CTRL	0x01
+#define ACT8600_DCDC1_VSET	0x10
+#define ACT8600_DCDC1_CTRL	0x12
+#define ACT8600_DCDC2_VSET	0x20
+#define ACT8600_DCDC2_CTRL	0x22
+#define ACT8600_DCDC3_VSET	0x30
+#define ACT8600_DCDC3_CTRL	0x32
+#define ACT8600_SUDCDC4_VSET	0x40
+#define ACT8600_SUDCDC4_CTRL	0x41
+#define ACT8600_LDO5_VSET	0x50
+#define ACT8600_LDO5_CTRL	0x51
+#define ACT8600_LDO6_VSET	0x60
+#define ACT8600_LDO6_CTRL	0x61
+#define ACT8600_LDO7_VSET	0x70
+#define ACT8600_LDO7_CTRL	0x71
+#define ACT8600_LDO8_VSET	0x80
+#define ACT8600_LDO8_CTRL	0x81
+#define ACT8600_LDO910_CTRL	0x91
+#define ACT8600_APCH0		0xA1
+#define ACT8600_APCH1		0xA8
+#define ACT8600_APCH2		0xA9
+#define ACT8600_APCH_STAT	0xAA
+#define ACT8600_OTG0		0xB0
+#define ACT8600_OTG1		0xB2
+
+/*
+ * ACT8846 Global Register Map.
+ */
+#define	ACT8846_SYS0		0x00
+#define	ACT8846_SYS1		0x01
+#define	ACT8846_REG1_VSET	0x10
+#define	ACT8846_REG1_CTRL	0x12
+#define	ACT8846_REG2_VSET0	0x20
+#define	ACT8846_REG2_VSET1	0x21
+#define	ACT8846_REG2_CTRL	0x22
+#define	ACT8846_REG3_VSET0	0x30
+#define	ACT8846_REG3_VSET1	0x31
+#define	ACT8846_REG3_CTRL	0x32
+#define	ACT8846_REG4_VSET0	0x40
+#define	ACT8846_REG4_VSET1	0x41
+#define	ACT8846_REG4_CTRL	0x42
+#define	ACT8846_REG5_VSET	0x50
+#define	ACT8846_REG5_CTRL	0x51
+#define	ACT8846_REG6_VSET	0x58
+#define	ACT8846_REG6_CTRL	0x59
+#define	ACT8846_REG7_VSET	0x60
+#define	ACT8846_REG7_CTRL	0x61
+#define	ACT8846_REG8_VSET	0x68
+#define	ACT8846_REG8_CTRL	0x69
+#define	ACT8846_REG9_VSET	0x70
+#define	ACT8846_REG9_CTRL	0x71
+#define	ACT8846_REG10_VSET	0x80
+#define	ACT8846_REG10_CTRL	0x81
+#define	ACT8846_REG11_VSET	0x90
+#define	ACT8846_REG11_CTRL	0x91
+#define	ACT8846_REG12_VSET	0xa0
+#define	ACT8846_REG12_CTRL	0xa1
+#define	ACT8846_REG13_CTRL	0xb1
+#define	ACT8846_GLB_OFF_CTRL	0xc3
+#define	ACT8846_OFF_SYSMASK	0x18
+
+/*
+ * ACT8865 Global Register Map.
+ */
+#define	ACT8865_SYS_MODE	0x00
+#define	ACT8865_SYS_CTRL	0x01
+#define	ACT8865_DCDC1_VSET1	0x20
+#define	ACT8865_DCDC1_VSET2	0x21
+#define	ACT8865_DCDC1_CTRL	0x22
+#define	ACT8865_DCDC2_VSET1	0x30
+#define	ACT8865_DCDC2_VSET2	0x31
+#define	ACT8865_DCDC2_CTRL	0x32
+#define	ACT8865_DCDC3_VSET1	0x40
+#define	ACT8865_DCDC3_VSET2	0x41
+#define	ACT8865_DCDC3_CTRL	0x42
+#define	ACT8865_LDO1_VSET	0x50
+#define	ACT8865_LDO1_CTRL	0x51
+#define	ACT8865_LDO2_VSET	0x54
+#define	ACT8865_LDO2_CTRL	0x55
+#define	ACT8865_LDO3_VSET	0x60
+#define	ACT8865_LDO3_CTRL	0x61
+#define	ACT8865_LDO4_VSET	0x64
+#define	ACT8865_LDO4_CTRL	0x65
+#define	ACT8865_MSTROFF		0x20
+
+/*
+ * Field Definitions.
+ */
+#define	ACT8865_ENA		0x80	/* ON - [7] */
+#define	ACT8865_VSEL_MASK	0x3F	/* VSET - [5:0] */
+
+
+#define ACT8600_LDO10_ENA		0x40	/* ON - [6] */
+#define ACT8600_SUDCDC_VSEL_MASK	0xFF	/* SUDCDC VSET - [7:0] */
+
+/*
+ * ACT8865 voltage number
+ */
+#define	ACT8865_VOLTAGE_NUM	64
+#define ACT8600_SUDCDC_VOLTAGE_NUM	255
+
+struct act8865 {
+	struct regmap *regmap;
+	int off_reg;
+	int off_mask;
+};
+
+static const struct regmap_config act8865_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static const struct regulator_linear_range act8865_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
+	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
+	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
+};
+
+static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
+	REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
+	REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
+	REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
+};
+
+static struct regulator_ops act8865_ops = {
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+static struct regulator_ops act8865_ldo_ops = {
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+#define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply)		\
+	[_family##_ID_##_id] = {					\
+		.name			= _name,			\
+		.supply_name		= _supply,			\
+		.id			= _family##_ID_##_id,		\
+		.type			= REGULATOR_VOLTAGE,		\
+		.ops			= &act8865_ops,			\
+		.n_voltages		= ACT8865_VOLTAGE_NUM,		\
+		.linear_ranges		= act8865_voltage_ranges,	\
+		.n_linear_ranges	= ARRAY_SIZE(act8865_voltage_ranges), \
+		.vsel_reg		= _family##_##_id##_##_vsel_reg, \
+		.vsel_mask		= ACT8865_VSEL_MASK,		\
+		.enable_reg		= _family##_##_id##_CTRL,	\
+		.enable_mask		= ACT8865_ENA,			\
+		.owner			= THIS_MODULE,			\
+	}
+
+static const struct regulator_desc act8600_regulators[] = {
+	ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
+	ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
+	ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
+	{
+		.name = "SUDCDC_REG4",
+		.id = ACT8600_ID_SUDCDC4,
+		.ops = &act8865_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
+		.linear_ranges = act8600_sudcdc_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
+		.vsel_reg = ACT8600_SUDCDC4_VSET,
+		.vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
+		.enable_reg = ACT8600_SUDCDC4_CTRL,
+		.enable_mask = ACT8865_ENA,
+		.owner = THIS_MODULE,
+	},
+	ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
+	ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
+	ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
+	ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
+	{
+		.name = "LDO_REG9",
+		.id = ACT8600_ID_LDO9,
+		.ops = &act8865_ldo_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 1,
+		.fixed_uV = 1800000,
+		.enable_reg = ACT8600_LDO910_CTRL,
+		.enable_mask = ACT8865_ENA,
+		.owner = THIS_MODULE,
+	},
+	{
+		.name = "LDO_REG10",
+		.id = ACT8600_ID_LDO10,
+		.ops = &act8865_ldo_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 1,
+		.fixed_uV = 1200000,
+		.enable_reg = ACT8600_LDO910_CTRL,
+		.enable_mask = ACT8600_LDO10_ENA,
+		.owner = THIS_MODULE,
+	},
+};
+
+static const struct regulator_desc act8846_regulators[] = {
+	ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
+	ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
+	ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
+	ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
+	ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
+	ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
+	ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
+	ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
+	ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
+	ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
+	ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
+	ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
+};
+
+static const struct regulator_desc act8865_regulators[] = {
+	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
+	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
+	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
+	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
+	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
+	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
+	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id act8865_dt_ids[] = {
+	{ .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
+	{ .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
+	{ .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, act8865_dt_ids);
+
+static struct of_regulator_match act8846_matches[] = {
+	[ACT8846_ID_REG1]	= { .name = "REG1" },
+	[ACT8846_ID_REG2]	= { .name = "REG2" },
+	[ACT8846_ID_REG3]	= { .name = "REG3" },
+	[ACT8846_ID_REG4]	= { .name = "REG4" },
+	[ACT8846_ID_REG5]	= { .name = "REG5" },
+	[ACT8846_ID_REG6]	= { .name = "REG6" },
+	[ACT8846_ID_REG7]	= { .name = "REG7" },
+	[ACT8846_ID_REG8]	= { .name = "REG8" },
+	[ACT8846_ID_REG9]	= { .name = "REG9" },
+	[ACT8846_ID_REG10]	= { .name = "REG10" },
+	[ACT8846_ID_REG11]	= { .name = "REG11" },
+	[ACT8846_ID_REG12]	= { .name = "REG12" },
+};
+
+static struct of_regulator_match act8865_matches[] = {
+	[ACT8865_ID_DCDC1]	= { .name = "DCDC_REG1"},
+	[ACT8865_ID_DCDC2]	= { .name = "DCDC_REG2"},
+	[ACT8865_ID_DCDC3]	= { .name = "DCDC_REG3"},
+	[ACT8865_ID_LDO1]	= { .name = "LDO_REG1"},
+	[ACT8865_ID_LDO2]	= { .name = "LDO_REG2"},
+	[ACT8865_ID_LDO3]	= { .name = "LDO_REG3"},
+	[ACT8865_ID_LDO4]	= { .name = "LDO_REG4"},
+};
+
+static struct of_regulator_match act8600_matches[] = {
+	[ACT8600_ID_DCDC1]	= { .name = "DCDC_REG1"},
+	[ACT8600_ID_DCDC2]	= { .name = "DCDC_REG2"},
+	[ACT8600_ID_DCDC3]	= { .name = "DCDC_REG3"},
+	[ACT8600_ID_SUDCDC4]	= { .name = "SUDCDC_REG4"},
+	[ACT8600_ID_LDO5]	= { .name = "LDO_REG5"},
+	[ACT8600_ID_LDO6]	= { .name = "LDO_REG6"},
+	[ACT8600_ID_LDO7]	= { .name = "LDO_REG7"},
+	[ACT8600_ID_LDO8]	= { .name = "LDO_REG8"},
+	[ACT8600_ID_LDO9]	= { .name = "LDO_REG9"},
+	[ACT8600_ID_LDO10]	= { .name = "LDO_REG10"},
+};
+
+static int act8865_pdata_from_dt(struct device *dev,
+				 struct device_node **of_node,
+				 struct act8865_platform_data *pdata,
+				 unsigned long type)
+{
+	int matched, i, num_matches;
+	struct device_node *np;
+	struct act8865_regulator_data *regulator;
+	struct of_regulator_match *matches;
+
+	np = of_get_child_by_name(dev->of_node, "regulators");
+	if (!np) {
+		dev_err(dev, "missing 'regulators' subnode in DT\n");
+		return -EINVAL;
+	}
+
+	switch (type) {
+	case ACT8600:
+		matches = act8600_matches;
+		num_matches = ARRAY_SIZE(act8600_matches);
+		break;
+	case ACT8846:
+		matches = act8846_matches;
+		num_matches = ARRAY_SIZE(act8846_matches);
+		break;
+	case ACT8865:
+		matches = act8865_matches;
+		num_matches = ARRAY_SIZE(act8865_matches);
+		break;
+	default:
+		dev_err(dev, "invalid device id %lu\n", type);
+		return -EINVAL;
+	}
+
+	matched = of_regulator_match(dev, np, matches, num_matches);
+	of_node_put(np);
+	if (matched <= 0)
+		return matched;
+
+	pdata->regulators = devm_kzalloc(dev,
+					 sizeof(struct act8865_regulator_data) *
+					 num_matches, GFP_KERNEL);
+	if (!pdata->regulators)
+		return -ENOMEM;
+
+	pdata->num_regulators = num_matches;
+	regulator = pdata->regulators;
+
+	for (i = 0; i < num_matches; i++) {
+		regulator->id = i;
+		regulator->name = matches[i].name;
+		regulator->platform_data = matches[i].init_data;
+		of_node[i] = matches[i].of_node;
+		regulator++;
+	}
+
+	return 0;
+}
+#else
+static inline int act8865_pdata_from_dt(struct device *dev,
+					struct device_node **of_node,
+					struct act8865_platform_data *pdata,
+					unsigned long type)
+{
+	return 0;
+}
+#endif
+
+static struct regulator_init_data
+*act8865_get_init_data(int id, struct act8865_platform_data *pdata)
+{
+	int i;
+
+	if (!pdata)
+		return NULL;
+
+	for (i = 0; i < pdata->num_regulators; i++) {
+		if (pdata->regulators[i].id == id)
+			return pdata->regulators[i].platform_data;
+	}
+
+	return NULL;
+}
+
+static struct i2c_client *act8865_i2c_client;
+static void act8865_power_off(void)
+{
+	struct act8865 *act8865;
+
+	act8865 = i2c_get_clientdata(act8865_i2c_client);
+	regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
+	while (1);
+}
+
+static int act8865_pmic_probe(struct i2c_client *client,
+			      const struct i2c_device_id *i2c_id)
+{
+	static const struct regulator_desc *regulators;
+	struct act8865_platform_data pdata_of, *pdata;
+	struct device *dev = &client->dev;
+	struct device_node **of_node;
+	int i, ret, num_regulators;
+	struct act8865 *act8865;
+	unsigned long type;
+	int off_reg, off_mask;
+
+	pdata = dev_get_platdata(dev);
+
+	if (dev->of_node && !pdata) {
+		const struct of_device_id *id;
+
+		id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
+		if (!id)
+			return -ENODEV;
+
+		type = (unsigned long) id->data;
+	} else {
+		type = i2c_id->driver_data;
+	}
+
+	switch (type) {
+	case ACT8600:
+		regulators = act8600_regulators;
+		num_regulators = ARRAY_SIZE(act8600_regulators);
+		off_reg = -1;
+		off_mask = -1;
+		break;
+	case ACT8846:
+		regulators = act8846_regulators;
+		num_regulators = ARRAY_SIZE(act8846_regulators);
+		off_reg = ACT8846_GLB_OFF_CTRL;
+		off_mask = ACT8846_OFF_SYSMASK;
+		break;
+	case ACT8865:
+		regulators = act8865_regulators;
+		num_regulators = ARRAY_SIZE(act8865_regulators);
+		off_reg = ACT8865_SYS_CTRL;
+		off_mask = ACT8865_MSTROFF;
+		break;
+	default:
+		dev_err(dev, "invalid device id %lu\n", type);
+		return -EINVAL;
+	}
+
+	of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
+			       num_regulators, GFP_KERNEL);
+	if (!of_node)
+		return -ENOMEM;
+
+	if (dev->of_node && !pdata) {
+		ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type);
+		if (ret < 0)
+			return ret;
+
+		pdata = &pdata_of;
+	}
+
+	if (pdata->num_regulators > num_regulators) {
+		dev_err(dev, "too many regulators: %d\n",
+			pdata->num_regulators);
+		return -EINVAL;
+	}
+
+	act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
+	if (!act8865)
+		return -ENOMEM;
+
+	act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
+	if (IS_ERR(act8865->regmap)) {
+		ret = PTR_ERR(act8865->regmap);
+		dev_err(&client->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	if (of_device_is_system_power_controller(dev->of_node)) {
+		if (!pm_power_off && (off_reg > 0)) {
+			act8865_i2c_client = client;
+			act8865->off_reg = off_reg;
+			act8865->off_mask = off_mask;
+			pm_power_off = act8865_power_off;
+		} else {
+			dev_err(dev, "Failed to set poweroff capability, already defined\n");
+		}
+	}
+
+	/* Finally register devices */
+	for (i = 0; i < num_regulators; i++) {
+		const struct regulator_desc *desc = &regulators[i];
+		struct regulator_config config = { };
+		struct regulator_dev *rdev;
+
+		config.dev = dev;
+		config.init_data = act8865_get_init_data(desc->id, pdata);
+		config.of_node = of_node[i];
+		config.driver_data = act8865;
+		config.regmap = act8865->regmap;
+
+		rdev = devm_regulator_register(&client->dev, desc, &config);
+		if (IS_ERR(rdev)) {
+			dev_err(dev, "failed to register %s\n", desc->name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	i2c_set_clientdata(client, act8865);
+	devm_kfree(dev, of_node);
+
+	return 0;
+}
+
+static const struct i2c_device_id act8865_ids[] = {
+	{ .name = "act8600", .driver_data = ACT8600 },
+	{ .name = "act8846", .driver_data = ACT8846 },
+	{ .name = "act8865", .driver_data = ACT8865 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, act8865_ids);
+
+static struct i2c_driver act8865_pmic_driver = {
+	.driver	= {
+		.name	= "act8865",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= act8865_pmic_probe,
+	.id_table	= act8865_ids,
+};
+
+module_i2c_driver(act8865_pmic_driver);
+
+MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
+MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
+MODULE_LICENSE("GPL v2");