1/*
2 * tps65217-regulator.c
3 *
4 * Regulator driver for TPS65217 PMIC
5 *
6 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation version 2.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/device.h>
21#include <linux/init.h>
22#include <linux/err.h>
23#include <linux/platform_device.h>
24
25#include <linux/regulator/of_regulator.h>
26#include <linux/regulator/driver.h>
27#include <linux/regulator/machine.h>
28#include <linux/mfd/tps65217.h>
29
30#define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
31                           _t, _lr, _nlr) \
32	{						\
33		.name		= _name,		\
34		.id		= _id,			\
35		.of_match       = of_match_ptr(_of_match),    \
36		.regulators_node= of_match_ptr("regulators"), \
37		.ops		= &_ops,		\
38		.n_voltages	= _n,			\
39		.type		= REGULATOR_VOLTAGE,	\
40		.owner		= THIS_MODULE,		\
41		.vsel_reg	= _vr,			\
42		.vsel_mask	= _vm,			\
43		.enable_reg	= TPS65217_REG_ENABLE,	\
44		.enable_mask	= _em,			\
45		.volt_table	= _t,			\
46		.linear_ranges	= _lr,			\
47		.n_linear_ranges = _nlr,		\
48	}						\
49
50static const unsigned int LDO1_VSEL_table[] = {
51	1000000, 1100000, 1200000, 1250000,
52	1300000, 1350000, 1400000, 1500000,
53	1600000, 1800000, 2500000, 2750000,
54	2800000, 3000000, 3100000, 3300000,
55};
56
57static const struct regulator_linear_range tps65217_uv1_ranges[] = {
58	REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
59	REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
60	REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
61	REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
62	REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
63};
64
65static const struct regulator_linear_range tps65217_uv2_ranges[] = {
66	REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
67	REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
68	REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
69};
70
71static int tps65217_pmic_enable(struct regulator_dev *dev)
72{
73	struct tps65217 *tps = rdev_get_drvdata(dev);
74	int rid = rdev_get_id(dev);
75
76	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
77		return -EINVAL;
78
79	/* Enable the regulator and password protection is level 1 */
80	return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
81				 dev->desc->enable_mask, dev->desc->enable_mask,
82				 TPS65217_PROTECT_L1);
83}
84
85static int tps65217_pmic_disable(struct regulator_dev *dev)
86{
87	struct tps65217 *tps = rdev_get_drvdata(dev);
88	int rid = rdev_get_id(dev);
89
90	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
91		return -EINVAL;
92
93	/* Disable the regulator and password protection is level 1 */
94	return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
95				   dev->desc->enable_mask, TPS65217_PROTECT_L1);
96}
97
98static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
99					 unsigned selector)
100{
101	int ret;
102	struct tps65217 *tps = rdev_get_drvdata(dev);
103	unsigned int rid = rdev_get_id(dev);
104
105	/* Set the voltage based on vsel value and write protect level is 2 */
106	ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
107				selector, TPS65217_PROTECT_L2);
108
109	/* Set GO bit for DCDCx to initiate voltage transistion */
110	switch (rid) {
111	case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
112		ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
113				       TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
114				       TPS65217_PROTECT_L2);
115		break;
116	}
117
118	return ret;
119}
120
121/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
122static struct regulator_ops tps65217_pmic_ops = {
123	.is_enabled		= regulator_is_enabled_regmap,
124	.enable			= tps65217_pmic_enable,
125	.disable		= tps65217_pmic_disable,
126	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
127	.set_voltage_sel	= tps65217_pmic_set_voltage_sel,
128	.list_voltage		= regulator_list_voltage_linear_range,
129	.map_voltage		= regulator_map_voltage_linear_range,
130};
131
132/* Operations permitted on LDO1 */
133static struct regulator_ops tps65217_pmic_ldo1_ops = {
134	.is_enabled		= regulator_is_enabled_regmap,
135	.enable			= tps65217_pmic_enable,
136	.disable		= tps65217_pmic_disable,
137	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
138	.set_voltage_sel	= tps65217_pmic_set_voltage_sel,
139	.list_voltage		= regulator_list_voltage_table,
140	.map_voltage		= regulator_map_voltage_ascend,
141};
142
143static const struct regulator_desc regulators[] = {
144	TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
145			   tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
146			   TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
147			   NULL, tps65217_uv1_ranges, 2),
148	TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
149			   tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
150			   TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
151			   NULL, tps65217_uv1_ranges,
152			   ARRAY_SIZE(tps65217_uv1_ranges)),
153	TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
154			   tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
155			   TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
156			   NULL, tps65217_uv1_ranges, 1),
157	TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
158			   tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
159			   TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
160			   LDO1_VSEL_table, NULL, 0),
161	TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
162			   64, TPS65217_REG_DEFLDO2,
163			   TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
164			   NULL, tps65217_uv1_ranges,
165			   ARRAY_SIZE(tps65217_uv1_ranges)),
166	TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
167			   32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
168			   TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
169			   NULL, tps65217_uv2_ranges,
170			   ARRAY_SIZE(tps65217_uv2_ranges)),
171	TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
172			   32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
173			   TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
174			   NULL, tps65217_uv2_ranges,
175			   ARRAY_SIZE(tps65217_uv2_ranges)),
176};
177
178static int tps65217_regulator_probe(struct platform_device *pdev)
179{
180	struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
181	struct tps65217_board *pdata = dev_get_platdata(tps->dev);
182	struct regulator_dev *rdev;
183	struct regulator_config config = { };
184	int i;
185
186	if (tps65217_chip_id(tps) != TPS65217) {
187		dev_err(&pdev->dev, "Invalid tps chip version\n");
188		return -ENODEV;
189	}
190
191	platform_set_drvdata(pdev, tps);
192
193	for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
194		/* Register the regulators */
195		config.dev = tps->dev;
196		if (pdata)
197			config.init_data = pdata->tps65217_init_data[i];
198		config.driver_data = tps;
199		config.regmap = tps->regmap;
200
201		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
202					       &config);
203		if (IS_ERR(rdev)) {
204			dev_err(tps->dev, "failed to register %s regulator\n",
205				pdev->name);
206			return PTR_ERR(rdev);
207		}
208	}
209
210	return 0;
211}
212
213static struct platform_driver tps65217_regulator_driver = {
214	.driver = {
215		.name = "tps65217-pmic",
216	},
217	.probe = tps65217_regulator_probe,
218};
219
220static int __init tps65217_regulator_init(void)
221{
222	return platform_driver_register(&tps65217_regulator_driver);
223}
224subsys_initcall(tps65217_regulator_init);
225
226static void __exit tps65217_regulator_exit(void)
227{
228	platform_driver_unregister(&tps65217_regulator_driver);
229}
230module_exit(tps65217_regulator_exit);
231
232MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
233MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
234MODULE_ALIAS("platform:tps65217-pmic");
235MODULE_LICENSE("GPL v2");
236