1 /*
2  * Regulator driver for TI TPS65912x PMICs
3  *
4  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
5  *	Andrew F. Davis <afd@ti.com>
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12  * kind, whether expressed or implied; without even the implied warranty
13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License version 2 for more details.
15  *
16  * Based on the TPS65218 driver and the previous TPS65912 driver by
17  * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
18  */
19 
20 #include <linux/module.h>
21 #include <linux/mod_devicetable.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/driver.h>
24 
25 #include <linux/mfd/tps65912.h>
26 
27 enum tps65912_regulators { DCDC1, DCDC2, DCDC3, DCDC4, LDO1, LDO2, LDO3,
28 	LDO4, LDO5, LDO6, LDO7, LDO8, LDO9, LDO10 };
29 
30 #define TPS65912_REGULATOR(_name, _id, _of_match, _ops, _vr, _er, _lr)	\
31 	[_id] = {							\
32 		.name			= _name,			\
33 		.of_match		= _of_match,			\
34 		.regulators_node	= "regulators",			\
35 		.id			= _id,				\
36 		.ops			= &_ops,			\
37 		.n_voltages		= 64,				\
38 		.type			= REGULATOR_VOLTAGE,		\
39 		.owner			= THIS_MODULE,			\
40 		.vsel_reg		= _vr,				\
41 		.vsel_mask		= 0x3f,				\
42 		.enable_reg		= _er,				\
43 		.enable_mask		= BIT(7),			\
44 		.volt_table		= NULL,				\
45 		.linear_ranges		= _lr,				\
46 		.n_linear_ranges	= ARRAY_SIZE(_lr),		\
47 	}
48 
49 static const struct regulator_linear_range tps65912_dcdc_ranges[] = {
50 	REGULATOR_LINEAR_RANGE(500000, 0x0, 0x3f, 50000),
51 };
52 
53 static const struct regulator_linear_range tps65912_ldo_ranges[] = {
54 	REGULATOR_LINEAR_RANGE(800000, 0x0, 0x20, 25000),
55 	REGULATOR_LINEAR_RANGE(1650000, 0x21, 0x3c, 50000),
56 	REGULATOR_LINEAR_RANGE(3100000, 0x3d, 0x3f, 100000),
57 };
58 
59 /* Operations permitted on DCDCx */
60 static struct regulator_ops tps65912_ops_dcdc = {
61 	.is_enabled		= regulator_is_enabled_regmap,
62 	.enable			= regulator_enable_regmap,
63 	.disable		= regulator_disable_regmap,
64 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
65 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
66 	.list_voltage		= regulator_list_voltage_linear_range,
67 };
68 
69 /* Operations permitted on LDOx */
70 static struct regulator_ops tps65912_ops_ldo = {
71 	.is_enabled		= regulator_is_enabled_regmap,
72 	.enable			= regulator_enable_regmap,
73 	.disable		= regulator_disable_regmap,
74 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
75 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
76 	.list_voltage		= regulator_list_voltage_linear_range,
77 	.map_voltage		= regulator_map_voltage_linear_range,
78 };
79 
80 static const struct regulator_desc regulators[] = {
81 	TPS65912_REGULATOR("DCDC1", DCDC1, "dcdc1", tps65912_ops_dcdc,
82 			   TPS65912_DCDC1_OP, TPS65912_DCDC1_CTRL,
83 			   tps65912_dcdc_ranges),
84 	TPS65912_REGULATOR("DCDC2", DCDC2, "dcdc2", tps65912_ops_dcdc,
85 			   TPS65912_DCDC2_OP, TPS65912_DCDC2_CTRL,
86 			   tps65912_dcdc_ranges),
87 	TPS65912_REGULATOR("DCDC3", DCDC3, "dcdc3", tps65912_ops_dcdc,
88 			   TPS65912_DCDC3_OP, TPS65912_DCDC3_CTRL,
89 			   tps65912_dcdc_ranges),
90 	TPS65912_REGULATOR("DCDC4", DCDC4, "dcdc4", tps65912_ops_dcdc,
91 			   TPS65912_DCDC4_OP, TPS65912_DCDC4_CTRL,
92 			   tps65912_dcdc_ranges),
93 	TPS65912_REGULATOR("LDO1", LDO1, "ldo1", tps65912_ops_ldo,
94 			   TPS65912_LDO1_OP, TPS65912_LDO1_AVS,
95 			   tps65912_ldo_ranges),
96 	TPS65912_REGULATOR("LDO2", LDO2, "ldo2", tps65912_ops_ldo,
97 			   TPS65912_LDO2_OP, TPS65912_LDO2_AVS,
98 			   tps65912_ldo_ranges),
99 	TPS65912_REGULATOR("LDO3", LDO3, "ldo3", tps65912_ops_ldo,
100 			   TPS65912_LDO3_OP, TPS65912_LDO3_AVS,
101 			   tps65912_ldo_ranges),
102 	TPS65912_REGULATOR("LDO4", LDO4, "ldo4", tps65912_ops_ldo,
103 			   TPS65912_LDO4_OP, TPS65912_LDO4_AVS,
104 			   tps65912_ldo_ranges),
105 	TPS65912_REGULATOR("LDO5", LDO5, "ldo5", tps65912_ops_ldo,
106 			   TPS65912_LDO5, TPS65912_LDO5,
107 			   tps65912_ldo_ranges),
108 	TPS65912_REGULATOR("LDO6", LDO6, "ldo6", tps65912_ops_ldo,
109 			   TPS65912_LDO6, TPS65912_LDO6,
110 			   tps65912_ldo_ranges),
111 	TPS65912_REGULATOR("LDO7", LDO7, "ldo7", tps65912_ops_ldo,
112 			   TPS65912_LDO7, TPS65912_LDO7,
113 			   tps65912_ldo_ranges),
114 	TPS65912_REGULATOR("LDO8", LDO8, "ldo8", tps65912_ops_ldo,
115 			   TPS65912_LDO8, TPS65912_LDO8,
116 			   tps65912_ldo_ranges),
117 	TPS65912_REGULATOR("LDO9", LDO9, "ldo9", tps65912_ops_ldo,
118 			   TPS65912_LDO9, TPS65912_LDO9,
119 			   tps65912_ldo_ranges),
120 	TPS65912_REGULATOR("LDO10", LDO10, "ldo10", tps65912_ops_ldo,
121 			   TPS65912_LDO10, TPS65912_LDO10,
122 			   tps65912_ldo_ranges),
123 };
124 
tps65912_regulator_probe(struct platform_device * pdev)125 static int tps65912_regulator_probe(struct platform_device *pdev)
126 {
127 	struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
128 	struct regulator_config config = { };
129 	struct regulator_dev *rdev;
130 	int i;
131 
132 	platform_set_drvdata(pdev, tps);
133 
134 	config.dev = &pdev->dev;
135 	config.driver_data = tps;
136 	config.dev->of_node = tps->dev->of_node;
137 	config.regmap = tps->regmap;
138 
139 	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
140 		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
141 					       &config);
142 		if (IS_ERR(rdev)) {
143 			dev_err(tps->dev, "failed to register %s regulator\n",
144 				pdev->name);
145 			return PTR_ERR(rdev);
146 		}
147 	}
148 
149 	return 0;
150 }
151 
152 static const struct platform_device_id tps65912_regulator_id_table[] = {
153 	{ "tps65912-regulator", },
154 	{ /* sentinel */ }
155 };
156 MODULE_DEVICE_TABLE(platform, tps65912_regulator_id_table);
157 
158 static struct platform_driver tps65912_regulator_driver = {
159 	.driver = {
160 		.name = "tps65912-regulator",
161 	},
162 	.probe = tps65912_regulator_probe,
163 	.id_table = tps65912_regulator_id_table,
164 };
165 module_platform_driver(tps65912_regulator_driver);
166 
167 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
168 MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
169 MODULE_LICENSE("GPL v2");
170