1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regulators driver for Marvell 88PM800
4 *
5 * Copyright (C) 2012 Marvell International Ltd.
6 * Joseph(Yossi) Hanin <yhanin@marvell.com>
7 * Yi Zhang <yizhang@marvell.com>
8 */
9#include <linux/module.h>
10#include <linux/moduleparam.h>
11#include <linux/init.h>
12#include <linux/err.h>
13#include <linux/regmap.h>
14#include <linux/regulator/driver.h>
15#include <linux/regulator/machine.h>
16#include <linux/mfd/88pm80x.h>
17#include <linux/delay.h>
18#include <linux/io.h>
19#include <linux/of.h>
20#include <linux/regulator/of_regulator.h>
21
22/* LDO1 with DVC[0..3] */
23#define PM800_LDO1_VOUT		(0x08) /* VOUT1 */
24#define PM800_LDO1_VOUT_2	(0x09)
25#define PM800_LDO1_VOUT_3	(0x0A)
26#define PM800_LDO2_VOUT		(0x0B)
27#define PM800_LDO3_VOUT		(0x0C)
28#define PM800_LDO4_VOUT		(0x0D)
29#define PM800_LDO5_VOUT		(0x0E)
30#define PM800_LDO6_VOUT		(0x0F)
31#define PM800_LDO7_VOUT		(0x10)
32#define PM800_LDO8_VOUT		(0x11)
33#define PM800_LDO9_VOUT		(0x12)
34#define PM800_LDO10_VOUT	(0x13)
35#define PM800_LDO11_VOUT	(0x14)
36#define PM800_LDO12_VOUT	(0x15)
37#define PM800_LDO13_VOUT	(0x16)
38#define PM800_LDO14_VOUT	(0x17)
39#define PM800_LDO15_VOUT	(0x18)
40#define PM800_LDO16_VOUT	(0x19)
41#define PM800_LDO17_VOUT	(0x1A)
42#define PM800_LDO18_VOUT	(0x1B)
43#define PM800_LDO19_VOUT	(0x1C)
44
45/* BUCK1 with DVC[0..3] */
46#define PM800_BUCK1		(0x3C)
47#define PM800_BUCK1_1		(0x3D)
48#define PM800_BUCK1_2		(0x3E)
49#define PM800_BUCK1_3		(0x3F)
50#define PM800_BUCK2		(0x40)
51#define PM800_BUCK3		(0x41)
52#define PM800_BUCK4		(0x42)
53#define PM800_BUCK4_1		(0x43)
54#define PM800_BUCK4_2		(0x44)
55#define PM800_BUCK4_3		(0x45)
56#define PM800_BUCK5		(0x46)
57
58#define PM800_BUCK_ENA		(0x50)
59#define PM800_LDO_ENA1_1	(0x51)
60#define PM800_LDO_ENA1_2	(0x52)
61#define PM800_LDO_ENA1_3	(0x53)
62
63#define PM800_LDO_ENA2_1	(0x56)
64#define PM800_LDO_ENA2_2	(0x57)
65#define PM800_LDO_ENA2_3	(0x58)
66
67#define PM800_BUCK1_MISC1	(0x78)
68#define PM800_BUCK3_MISC1	(0x7E)
69#define PM800_BUCK4_MISC1	(0x81)
70#define PM800_BUCK5_MISC1	(0x84)
71
72struct pm800_regulator_info {
73	struct regulator_desc desc;
74	int max_ua;
75};
76
77/*
78 * vreg - the buck regs string.
79 * ereg - the string for the enable register.
80 * ebit - the bit number in the enable register.
81 * amax - the current
82 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
83 * not the constant voltage table.
84 * n_volt - Number of available selectors
85 */
86#define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt)	\
87{									\
88	.desc	= {							\
89		.name			= #vreg,			\
90		.of_match		= of_match_ptr(#match),		\
91		.regulators_node	= of_match_ptr("regulators"),	\
92		.ops			= &pm800_volt_range_ops,	\
93		.type			= REGULATOR_VOLTAGE,		\
94		.id			= PM800_ID_##vreg,		\
95		.owner			= THIS_MODULE,			\
96		.n_voltages		= n_volt,			\
97		.linear_ranges		= volt_ranges,			\
98		.n_linear_ranges	= ARRAY_SIZE(volt_ranges),	\
99		.vsel_reg		= PM800_##vreg,			\
100		.vsel_mask		= 0x7f,				\
101		.enable_reg		= PM800_##ereg,			\
102		.enable_mask		= 1 << (ebit),			\
103	},								\
104	.max_ua	= (amax),						\
105}
106
107/*
108 * vreg - the LDO regs string
109 * ereg -  the string for the enable register.
110 * ebit - the bit number in the enable register.
111 * amax - the current
112 * volt_table - the LDO voltage table
113 * For all the LDOes, there are too many ranges. Using volt_table will be
114 * simpler and faster.
115 */
116#define PM800_LDO(match, vreg, ereg, ebit, amax, ldo_volt_table)	\
117{									\
118	.desc	= {							\
119		.name			= #vreg,			\
120		.of_match		= of_match_ptr(#match),		\
121		.regulators_node	= of_match_ptr("regulators"),	\
122		.ops			= &pm800_volt_table_ops,	\
123		.type			= REGULATOR_VOLTAGE,		\
124		.id			= PM800_ID_##vreg,		\
125		.owner			= THIS_MODULE,			\
126		.n_voltages		= ARRAY_SIZE(ldo_volt_table),	\
127		.vsel_reg		= PM800_##vreg##_VOUT,		\
128		.vsel_mask		= 0xf,				\
129		.enable_reg		= PM800_##ereg,			\
130		.enable_mask		= 1 << (ebit),			\
131		.volt_table		= ldo_volt_table,		\
132	},								\
133	.max_ua	= (amax),						\
134}
135
136/* Ranges are sorted in ascending order. */
137static const struct linear_range buck1_volt_range[] = {
138	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
139	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
140};
141
142/* BUCK 2~5 have same ranges. */
143static const struct linear_range buck2_5_volt_range[] = {
144	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
145	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
146};
147
148static const unsigned int ldo1_volt_table[] = {
149	600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
150	1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
151};
152
153static const unsigned int ldo2_volt_table[] = {
154	1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
155};
156
157/* LDO 3~17 have same voltage table. */
158static const unsigned int ldo3_17_volt_table[] = {
159	1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
160	2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
161};
162
163/* LDO 18~19 have same voltage table. */
164static const unsigned int ldo18_19_volt_table[] = {
165	1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
166};
167
168static int pm800_get_current_limit(struct regulator_dev *rdev)
169{
170	struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
171
172	return info->max_ua;
173}
174
175static const struct regulator_ops pm800_volt_range_ops = {
176	.list_voltage		= regulator_list_voltage_linear_range,
177	.map_voltage		= regulator_map_voltage_linear_range,
178	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
179	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
180	.enable			= regulator_enable_regmap,
181	.disable		= regulator_disable_regmap,
182	.is_enabled		= regulator_is_enabled_regmap,
183	.get_current_limit	= pm800_get_current_limit,
184};
185
186static const struct regulator_ops pm800_volt_table_ops = {
187	.list_voltage		= regulator_list_voltage_table,
188	.map_voltage		= regulator_map_voltage_iterate,
189	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
190	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
191	.enable			= regulator_enable_regmap,
192	.disable		= regulator_disable_regmap,
193	.is_enabled		= regulator_is_enabled_regmap,
194	.get_current_limit	= pm800_get_current_limit,
195};
196
197/* The array is indexed by id(PM800_ID_XXX) */
198static struct pm800_regulator_info pm800_regulator_info[] = {
199	PM800_BUCK(buck1, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
200	PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
201	PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
202	PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
203	PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
204
205	PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
206	PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
207	PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
208	PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
209	PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
210	PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
211	PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
212	PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
213	PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
214	PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
215	PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
216	PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
217	PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
218	PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
219	PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
220	PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
221	PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
222	PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
223	PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
224};
225
226static int pm800_regulator_probe(struct platform_device *pdev)
227{
228	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
229	struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
230	struct regulator_config config = { };
231	struct regulator_init_data *init_data;
232	int i, ret;
233
234	if (pdata && pdata->num_regulators) {
235		unsigned int count = 0;
236
237		/* Check whether num_regulator is valid. */
238		for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
239			if (pdata->regulators[i])
240				count++;
241		}
242		if (count != pdata->num_regulators)
243			return -EINVAL;
244	}
245
246	config.dev = chip->dev;
247	config.regmap = chip->subchip->regmap_power;
248	for (i = 0; i < PM800_ID_RG_MAX; i++) {
249		struct regulator_dev *regulator;
250
251		if (pdata && pdata->num_regulators) {
252			init_data = pdata->regulators[i];
253			if (!init_data)
254				continue;
255
256			config.init_data = init_data;
257		}
258
259		config.driver_data = &pm800_regulator_info[i];
260
261		regulator = devm_regulator_register(&pdev->dev,
262				&pm800_regulator_info[i].desc, &config);
263		if (IS_ERR(regulator)) {
264			ret = PTR_ERR(regulator);
265			dev_err(&pdev->dev, "Failed to register %s\n",
266					pm800_regulator_info[i].desc.name);
267			return ret;
268		}
269	}
270
271	return 0;
272}
273
274static struct platform_driver pm800_regulator_driver = {
275	.driver		= {
276		.name	= "88pm80x-regulator",
277		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
278	},
279	.probe		= pm800_regulator_probe,
280};
281
282module_platform_driver(pm800_regulator_driver);
283
284MODULE_LICENSE("GPL");
285MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
286MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
287MODULE_ALIAS("platform:88pm800-regulator");
288