fishHEADmaster

1 files changed, 464 insertions, 0 deletions

diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
new file mode 100644
index 0000000..2c9155b
--- /dev/null
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -0,0 +1,464 @@
+/*
+ * Regulator driver for TI TPS6586x
+ *
+ * Copyright (C) 2010 Compulab Ltd.
+ * Author: Mike Rapoport <mike@compulab.co.il>
+ *
+ * Based on da903x
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Copyright (C) 2008 Compulab Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/tps6586x.h>
+
+/* supply control and voltage setting  */
+#define TPS6586X_SUPPLYENA	0x10
+#define TPS6586X_SUPPLYENB	0x11
+#define TPS6586X_SUPPLYENC	0x12
+#define TPS6586X_SUPPLYEND	0x13
+#define TPS6586X_SUPPLYENE	0x14
+#define TPS6586X_VCC1		0x20
+#define TPS6586X_VCC2		0x21
+#define TPS6586X_SM1V1		0x23
+#define TPS6586X_SM1V2		0x24
+#define TPS6586X_SM1SL		0x25
+#define TPS6586X_SM0V1		0x26
+#define TPS6586X_SM0V2		0x27
+#define TPS6586X_SM0SL		0x28
+#define TPS6586X_LDO2AV1	0x29
+#define TPS6586X_LDO2AV2	0x2A
+#define TPS6586X_LDO2BV1	0x2F
+#define TPS6586X_LDO2BV2	0x30
+#define TPS6586X_LDO4V1		0x32
+#define TPS6586X_LDO4V2		0x33
+
+/* converter settings  */
+#define TPS6586X_SUPPLYV1	0x41
+#define TPS6586X_SUPPLYV2	0x42
+#define TPS6586X_SUPPLYV3	0x43
+#define TPS6586X_SUPPLYV4	0x44
+#define TPS6586X_SUPPLYV5	0x45
+#define TPS6586X_SUPPLYV6	0x46
+#define TPS6586X_SMODE1		0x47
+#define TPS6586X_SMODE2		0x48
+
+struct tps6586x_regulator {
+	struct regulator_desc desc;
+
+	int enable_bit[2];
+	int enable_reg[2];
+};
+
+static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
+{
+	return rdev_get_dev(rdev)->parent;
+}
+
+static struct regulator_ops tps6586x_regulator_ops = {
+	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_ascend,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+};
+
+static struct regulator_ops tps6586x_sys_regulator_ops = {
+};
+
+static const unsigned int tps6586x_ldo0_voltages[] = {
+	1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
+};
+
+static const unsigned int tps6586x_ldo4_voltages[] = {
+	1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
+	1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
+	2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
+	2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
+};
+
+static const unsigned int tps6586x_ldo_voltages[] = {
+	1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
+};
+
+static const unsigned int tps6586x_sm2_voltages[] = {
+	3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
+	3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
+	3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
+	4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
+};
+
+static const unsigned int tps6586x_dvm_voltages[] = {
+	 725000,  750000,  775000,  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,
+};
+
+#define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits,	\
+			   ereg0, ebit0, ereg1, ebit1, goreg, gobit)	\
+	.desc	= {							\
+		.supply_name = _pin_name,				\
+		.name	= "REG-" #_id,					\
+		.ops	= &tps6586x_regulator_ops,			\
+		.type	= REGULATOR_VOLTAGE,				\
+		.id	= TPS6586X_ID_##_id,				\
+		.n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages),	\
+		.volt_table = tps6586x_##vdata##_voltages,		\
+		.owner	= THIS_MODULE,					\
+		.enable_reg = TPS6586X_SUPPLY##ereg0,			\
+		.enable_mask = 1 << (ebit0),				\
+		.vsel_reg = TPS6586X_##vreg,				\
+		.vsel_mask = ((1 << (nbits)) - 1) << (shift),		\
+		.apply_reg = (goreg),				\
+		.apply_bit = (gobit),				\
+	},								\
+	.enable_reg[0]	= TPS6586X_SUPPLY##ereg0,			\
+	.enable_bit[0]	= (ebit0),					\
+	.enable_reg[1]	= TPS6586X_SUPPLY##ereg1,			\
+	.enable_bit[1]	= (ebit1),
+
+#define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits,		\
+		     ereg0, ebit0, ereg1, ebit1)			\
+{									\
+	TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits,	\
+			   ereg0, ebit0, ereg1, ebit1, 0, 0)		\
+}
+
+#define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits,		\
+		     ereg0, ebit0, ereg1, ebit1, goreg, gobit)		\
+{									\
+	TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits,	\
+			   ereg0, ebit0, ereg1, ebit1, goreg, gobit)	\
+}
+
+#define TPS6586X_SYS_REGULATOR()					\
+{									\
+	.desc	= {							\
+		.supply_name = "sys",					\
+		.name	= "REG-SYS",					\
+		.ops	= &tps6586x_sys_regulator_ops,			\
+		.type	= REGULATOR_VOLTAGE,				\
+		.id	= TPS6586X_ID_SYS,				\
+		.owner	= THIS_MODULE,					\
+	},								\
+}
+
+static struct tps6586x_regulator tps6586x_regulator[] = {
+	TPS6586X_SYS_REGULATOR(),
+	TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
+	TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
+	TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
+	TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
+	TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
+	TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
+	TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
+	TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
+	TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
+	TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
+
+	TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
+					ENB, 3, TPS6586X_VCC2, BIT(6)),
+	TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
+					END, 3, TPS6586X_VCC1, BIT(6)),
+	TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1,
+					ENB, 1, TPS6586X_VCC1, BIT(2)),
+	TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0,
+					ENB, 0, TPS6586X_VCC1, BIT(0)),
+};
+
+/*
+ * TPS6586X has 2 enable bits that are OR'ed to determine the actual
+ * regulator state. Clearing one of this bits allows switching
+ * regulator on and of with single register write.
+ */
+static inline int tps6586x_regulator_preinit(struct device *parent,
+					     struct tps6586x_regulator *ri)
+{
+	uint8_t val1, val2;
+	int ret;
+
+	if (ri->enable_reg[0] == ri->enable_reg[1] &&
+	    ri->enable_bit[0] == ri->enable_bit[1])
+			return 0;
+
+	ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
+	if (ret)
+		return ret;
+
+	ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
+	if (ret)
+		return ret;
+
+	if (!(val2 & (1 << ri->enable_bit[1])))
+		return 0;
+
+	/*
+	 * The regulator is on, but it's enabled with the bit we don't
+	 * want to use, so we switch the enable bits
+	 */
+	if (!(val1 & (1 << ri->enable_bit[0]))) {
+		ret = tps6586x_set_bits(parent, ri->enable_reg[0],
+					1 << ri->enable_bit[0]);
+		if (ret)
+			return ret;
+	}
+
+	return tps6586x_clr_bits(parent, ri->enable_reg[1],
+				 1 << ri->enable_bit[1]);
+}
+
+static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
+			int id, struct regulator_init_data *p)
+{
+	struct device *parent = pdev->dev.parent;
+	struct tps6586x_settings *setting = p->driver_data;
+	uint8_t reg;
+
+	if (setting == NULL)
+		return 0;
+
+	if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
+		return 0;
+
+	/* only SM0 and SM1 can have the slew rate settings */
+	switch (id) {
+	case TPS6586X_ID_SM_0:
+		reg = TPS6586X_SM0SL;
+		break;
+	case TPS6586X_ID_SM_1:
+		reg = TPS6586X_SM1SL;
+		break;
+	default:
+		dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
+		return -EINVAL;
+	}
+
+	return tps6586x_write(parent, reg,
+			setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
+}
+
+static inline struct tps6586x_regulator *find_regulator_info(int id)
+{
+	struct tps6586x_regulator *ri;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
+		ri = &tps6586x_regulator[i];
+		if (ri->desc.id == id)
+			return ri;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_OF
+static struct of_regulator_match tps6586x_matches[] = {
+	{ .name = "sys",     .driver_data = (void *)TPS6586X_ID_SYS     },
+	{ .name = "sm0",     .driver_data = (void *)TPS6586X_ID_SM_0    },
+	{ .name = "sm1",     .driver_data = (void *)TPS6586X_ID_SM_1    },
+	{ .name = "sm2",     .driver_data = (void *)TPS6586X_ID_SM_2    },
+	{ .name = "ldo0",    .driver_data = (void *)TPS6586X_ID_LDO_0   },
+	{ .name = "ldo1",    .driver_data = (void *)TPS6586X_ID_LDO_1   },
+	{ .name = "ldo2",    .driver_data = (void *)TPS6586X_ID_LDO_2   },
+	{ .name = "ldo3",    .driver_data = (void *)TPS6586X_ID_LDO_3   },
+	{ .name = "ldo4",    .driver_data = (void *)TPS6586X_ID_LDO_4   },
+	{ .name = "ldo5",    .driver_data = (void *)TPS6586X_ID_LDO_5   },
+	{ .name = "ldo6",    .driver_data = (void *)TPS6586X_ID_LDO_6   },
+	{ .name = "ldo7",    .driver_data = (void *)TPS6586X_ID_LDO_7   },
+	{ .name = "ldo8",    .driver_data = (void *)TPS6586X_ID_LDO_8   },
+	{ .name = "ldo9",    .driver_data = (void *)TPS6586X_ID_LDO_9   },
+	{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
+};
+
+static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
+		struct platform_device *pdev,
+		struct of_regulator_match **tps6586x_reg_matches)
+{
+	const unsigned int num = ARRAY_SIZE(tps6586x_matches);
+	struct device_node *np = pdev->dev.parent->of_node;
+	struct device_node *regs;
+	const char *sys_rail = NULL;
+	unsigned int i;
+	struct tps6586x_platform_data *pdata;
+	int err;
+
+	regs = of_find_node_by_name(np, "regulators");
+	if (!regs) {
+		dev_err(&pdev->dev, "regulator node not found\n");
+		return NULL;
+	}
+
+	err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
+	of_node_put(regs);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
+		return NULL;
+	}
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		dev_err(&pdev->dev, "Memory alloction failed\n");
+		return NULL;
+	}
+
+	for (i = 0; i < num; i++) {
+		int id;
+		if (!tps6586x_matches[i].init_data)
+			continue;
+
+		pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
+		id = (int)tps6586x_matches[i].driver_data;
+		if (id == TPS6586X_ID_SYS)
+			sys_rail = pdata->reg_init_data[i]->constraints.name;
+
+		if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
+			pdata->reg_init_data[i]->supply_regulator = sys_rail;
+	}
+	*tps6586x_reg_matches = tps6586x_matches;
+	return pdata;
+}
+#else
+static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
+		struct platform_device *pdev,
+		struct of_regulator_match **tps6586x_reg_matches)
+{
+	*tps6586x_reg_matches = NULL;
+	return NULL;
+}
+#endif
+
+static int tps6586x_regulator_probe(struct platform_device *pdev)
+{
+	struct tps6586x_regulator *ri = NULL;
+	struct regulator_config config = { };
+	struct regulator_dev **rdev;
+	struct regulator_init_data *reg_data;
+	struct tps6586x_platform_data *pdata;
+	struct of_regulator_match *tps6586x_reg_matches = NULL;
+	int id;
+	int err;
+
+	dev_dbg(&pdev->dev, "Probing regulator\n");
+
+	pdata = dev_get_platdata(pdev->dev.parent);
+	if ((!pdata) && (pdev->dev.parent->of_node))
+		pdata = tps6586x_parse_regulator_dt(pdev,
+					&tps6586x_reg_matches);
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "Platform data not available, exiting\n");
+		return -ENODEV;
+	}
+
+	rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR *
+				sizeof(*rdev), GFP_KERNEL);
+	if (!rdev) {
+		dev_err(&pdev->dev, "Mmemory alloc failed\n");
+		return -ENOMEM;
+	}
+
+	for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
+		reg_data = pdata->reg_init_data[id];
+
+		ri = find_regulator_info(id);
+		if (!ri) {
+			dev_err(&pdev->dev, "invalid regulator ID specified\n");
+			err = -EINVAL;
+			goto fail;
+		}
+
+		err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
+		if (err) {
+			dev_err(&pdev->dev,
+				"regulator %d preinit failed, e %d\n", id, err);
+			goto fail;
+		}
+
+		config.dev = pdev->dev.parent;
+		config.init_data = reg_data;
+		config.driver_data = ri;
+
+		if (tps6586x_reg_matches)
+			config.of_node = tps6586x_reg_matches[id].of_node;
+
+		rdev[id] = regulator_register(&ri->desc, &config);
+		if (IS_ERR(rdev[id])) {
+			dev_err(&pdev->dev, "failed to register regulator %s\n",
+					ri->desc.name);
+			err = PTR_ERR(rdev[id]);
+			goto fail;
+		}
+
+		if (reg_data) {
+			err = tps6586x_regulator_set_slew_rate(pdev, id,
+					reg_data);
+			if (err < 0) {
+				dev_err(&pdev->dev,
+					"Slew rate config failed, e %d\n", err);
+				regulator_unregister(rdev[id]);
+				goto fail;
+			}
+		}
+	}
+
+	platform_set_drvdata(pdev, rdev);
+	return 0;
+
+fail:
+	while (--id >= 0)
+		regulator_unregister(rdev[id]);
+	return err;
+}
+
+static int tps6586x_regulator_remove(struct platform_device *pdev)
+{
+	struct regulator_dev **rdev = platform_get_drvdata(pdev);
+	int id = TPS6586X_ID_MAX_REGULATOR;
+
+	while (--id >= 0)
+		regulator_unregister(rdev[id]);
+
+	return 0;
+}
+
+static struct platform_driver tps6586x_regulator_driver = {
+	.driver	= {
+		.name	= "tps6586x-regulator",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= tps6586x_regulator_probe,
+	.remove		= tps6586x_regulator_remove,
+};
+
+static int __init tps6586x_regulator_init(void)
+{
+	return platform_driver_register(&tps6586x_regulator_driver);
+}
+subsys_initcall(tps6586x_regulator_init);
+
+static void __exit tps6586x_regulator_exit(void)
+{
+	platform_driver_unregister(&tps6586x_regulator_driver);
+}
+module_exit(tps6586x_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
+MODULE_ALIAS("platform:tps6586x-regulator");