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9952f691 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6ffc3270 LD |
2 | /* |
3 | * Regulator driver for RICOH RC5T583 power management chip. | |
4 | * | |
5 | * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. | |
6 | * Author: Laxman dewangan <ldewangan@nvidia.com> | |
7 | * | |
8 | * based on code | |
9 | * Copyright (C) 2011 RICOH COMPANY,LTD | |
6ffc3270 LD |
10 | */ |
11 | ||
12 | #include <linux/module.h> | |
6ffc3270 LD |
13 | #include <linux/init.h> |
14 | #include <linux/slab.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/regulator/driver.h> | |
18 | #include <linux/regulator/machine.h> | |
6ffc3270 LD |
19 | #include <linux/mfd/rc5t583.h> |
20 | ||
21 | struct rc5t583_regulator_info { | |
22 | int deepsleep_id; | |
23 | ||
24 | /* Regulator register address.*/ | |
6ffc3270 LD |
25 | uint8_t reg_disc_reg; |
26 | uint8_t disc_bit; | |
6ffc3270 LD |
27 | uint8_t deepsleep_reg; |
28 | ||
6ffc3270 LD |
29 | /* Regulator specific turn-on delay and voltage settling time*/ |
30 | int enable_uv_per_us; | |
6ffc3270 LD |
31 | |
32 | /* Used by regulator core */ | |
33 | struct regulator_desc desc; | |
34 | }; | |
35 | ||
6ffc3270 LD |
36 | static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) |
37 | { | |
c07608f7 | 38 | struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev); |
15b397d7 | 39 | int vsel = regulator_get_voltage_sel_regmap(rdev); |
3209be17 | 40 | int curr_uV = regulator_list_voltage_linear(rdev, vsel); |
15b397d7 | 41 | |
c07608f7 | 42 | return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us); |
6ffc3270 LD |
43 | } |
44 | ||
fb74036b | 45 | static const struct regulator_ops rc5t583_ops = { |
5bb6936c AL |
46 | .is_enabled = regulator_is_enabled_regmap, |
47 | .enable = regulator_enable_regmap, | |
48 | .disable = regulator_disable_regmap, | |
6ffc3270 | 49 | .enable_time = rc5t583_regulator_enable_time, |
15b397d7 | 50 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
70e5f645 | 51 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
3209be17 | 52 | .list_voltage = regulator_list_voltage_linear, |
70e5f645 | 53 | .map_voltage = regulator_map_voltage_linear, |
2f6ae6ef | 54 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
6ffc3270 LD |
55 | }; |
56 | ||
95e301ba AL |
57 | #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \ |
58 | _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \ | |
6ffc3270 | 59 | { \ |
6ffc3270 LD |
60 | .reg_disc_reg = RC5T583_REG_##_disc_reg, \ |
61 | .disc_bit = _disc_bit, \ | |
95e301ba | 62 | .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ |
6ffc3270 | 63 | .enable_uv_per_us = _enable_mv * 1000, \ |
6ffc3270 LD |
64 | .deepsleep_id = RC5T583_DS_##_id, \ |
65 | .desc = { \ | |
66 | .name = "rc5t583-regulator-"#_id, \ | |
67 | .id = RC5T583_REGULATOR_##_id, \ | |
e3a7384c | 68 | .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \ |
6ffc3270 LD |
69 | .ops = &rc5t583_ops, \ |
70 | .type = REGULATOR_VOLTAGE, \ | |
71 | .owner = THIS_MODULE, \ | |
15b397d7 AL |
72 | .vsel_reg = RC5T583_REG_##_id##DAC, \ |
73 | .vsel_mask = _vout_mask, \ | |
5bb6936c AL |
74 | .enable_reg = RC5T583_REG_##_en_reg, \ |
75 | .enable_mask = BIT(_en_bit), \ | |
3209be17 AL |
76 | .min_uV = _min_mv * 1000, \ |
77 | .uV_step = _step_uV, \ | |
2f6ae6ef | 78 | .ramp_delay = 40 * 1000, \ |
6ffc3270 LD |
79 | }, \ |
80 | } | |
81 | ||
82 | static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = { | |
95e301ba AL |
83 | RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4), |
84 | RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14), | |
85 | RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14), | |
86 | RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14), | |
87 | RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160), | |
88 | RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160), | |
89 | RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160), | |
90 | RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160), | |
91 | RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133), | |
92 | RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267), | |
93 | RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133), | |
94 | RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233), | |
95 | RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233), | |
96 | RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133), | |
6ffc3270 LD |
97 | }; |
98 | ||
a5023574 | 99 | static int rc5t583_regulator_probe(struct platform_device *pdev) |
6ffc3270 LD |
100 | { |
101 | struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); | |
102 | struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev); | |
c172708d | 103 | struct regulator_config config = { }; |
6ffc3270 LD |
104 | struct regulator_dev *rdev; |
105 | struct rc5t583_regulator_info *ri; | |
106 | int ret; | |
107 | int id; | |
108 | ||
109 | if (!pdata) { | |
110 | dev_err(&pdev->dev, "No platform data, exiting...\n"); | |
111 | return -ENODEV; | |
112 | } | |
113 | ||
6ffc3270 | 114 | for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { |
6ffc3270 | 115 | ri = &rc5t583_reg_info[id]; |
6ffc3270 LD |
116 | |
117 | if (ri->deepsleep_id == RC5T583_DS_NONE) | |
118 | goto skip_ext_pwr_config; | |
119 | ||
120 | ret = rc5t583_ext_power_req_config(rc5t583->dev, | |
121 | ri->deepsleep_id, | |
122 | pdata->regulator_ext_pwr_control[id], | |
123 | pdata->regulator_deepsleep_slot[id]); | |
124 | /* | |
125 | * Configuring external control is not a major issue, | |
126 | * just give warning. | |
127 | */ | |
128 | if (ret < 0) | |
129 | dev_warn(&pdev->dev, | |
130 | "Failed to configure ext control %d\n", id); | |
131 | ||
132 | skip_ext_pwr_config: | |
c172708d | 133 | config.dev = &pdev->dev; |
3f24bf70 | 134 | config.init_data = pdata->reg_init_data[id]; |
c07608f7 | 135 | config.driver_data = ri; |
5bb6936c | 136 | config.regmap = rc5t583->regmap; |
c172708d | 137 | |
13775309 | 138 | rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); |
a69df8a1 | 139 | if (IS_ERR(rdev)) { |
6ffc3270 LD |
140 | dev_err(&pdev->dev, "Failed to register regulator %s\n", |
141 | ri->desc.name); | |
13775309 | 142 | return PTR_ERR(rdev); |
6ffc3270 | 143 | } |
6ffc3270 | 144 | } |
6ffc3270 | 145 | return 0; |
6ffc3270 LD |
146 | } |
147 | ||
148 | static struct platform_driver rc5t583_regulator_driver = { | |
149 | .driver = { | |
150 | .name = "rc5t583-regulator", | |
259b93b2 | 151 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
6ffc3270 LD |
152 | }, |
153 | .probe = rc5t583_regulator_probe, | |
6ffc3270 LD |
154 | }; |
155 | ||
156 | static int __init rc5t583_regulator_init(void) | |
157 | { | |
158 | return platform_driver_register(&rc5t583_regulator_driver); | |
159 | } | |
160 | subsys_initcall(rc5t583_regulator_init); | |
161 | ||
162 | static void __exit rc5t583_regulator_exit(void) | |
163 | { | |
164 | platform_driver_unregister(&rc5t583_regulator_driver); | |
165 | } | |
166 | module_exit(rc5t583_regulator_exit); | |
167 | ||
168 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); | |
169 | MODULE_DESCRIPTION("RC5T583 regulator driver"); | |
170 | MODULE_ALIAS("platform:rc5t583-regulator"); | |
4eb06453 | 171 | MODULE_LICENSE("GPL v2"); |