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6ffc3270 LD |
1 | /* |
2 | * Regulator driver for RICOH RC5T583 power management chip. | |
3 | * | |
4 | * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. | |
5 | * Author: Laxman dewangan <ldewangan@nvidia.com> | |
6 | * | |
7 | * based on code | |
8 | * Copyright (C) 2011 RICOH COMPANY,LTD | |
9 | * | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms and conditions of the GNU General Public License, | |
13 | * version 2, as published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope it will be useful, but WITHOUT | |
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
18 | * more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
6ffc3270 LD |
26 | #include <linux/init.h> |
27 | #include <linux/slab.h> | |
28 | #include <linux/err.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/regulator/driver.h> | |
31 | #include <linux/regulator/machine.h> | |
32 | #include <linux/gpio.h> | |
33 | #include <linux/mfd/rc5t583.h> | |
34 | ||
35 | struct rc5t583_regulator_info { | |
36 | int deepsleep_id; | |
37 | ||
38 | /* Regulator register address.*/ | |
6ffc3270 LD |
39 | uint8_t reg_disc_reg; |
40 | uint8_t disc_bit; | |
6ffc3270 LD |
41 | uint8_t deepsleep_reg; |
42 | ||
6ffc3270 LD |
43 | /* Regulator specific turn-on delay and voltage settling time*/ |
44 | int enable_uv_per_us; | |
45 | int change_uv_per_us; | |
46 | ||
47 | /* Used by regulator core */ | |
48 | struct regulator_desc desc; | |
49 | }; | |
50 | ||
51 | struct rc5t583_regulator { | |
52 | struct rc5t583_regulator_info *reg_info; | |
53 | ||
54 | /* Devices */ | |
55 | struct device *dev; | |
56 | struct rc5t583 *mfd; | |
57 | struct regulator_dev *rdev; | |
58 | }; | |
59 | ||
6ffc3270 LD |
60 | static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) |
61 | { | |
62 | struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); | |
15b397d7 | 63 | int vsel = regulator_get_voltage_sel_regmap(rdev); |
3209be17 | 64 | int curr_uV = regulator_list_voltage_linear(rdev, vsel); |
15b397d7 | 65 | |
6ffc3270 LD |
66 | return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us); |
67 | } | |
68 | ||
69 | static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev, | |
70 | unsigned int old_selector, unsigned int new_selector) | |
71 | { | |
72 | struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); | |
73 | int old_uV, new_uV; | |
3209be17 | 74 | old_uV = regulator_list_voltage_linear(rdev, old_selector); |
6ffc3270 LD |
75 | |
76 | if (old_uV < 0) | |
77 | return old_uV; | |
78 | ||
3209be17 | 79 | new_uV = regulator_list_voltage_linear(rdev, new_selector); |
6ffc3270 LD |
80 | if (new_uV < 0) |
81 | return new_uV; | |
82 | ||
83 | return DIV_ROUND_UP(abs(old_uV - new_uV), | |
84 | reg->reg_info->change_uv_per_us); | |
85 | } | |
86 | ||
87 | ||
88 | static struct regulator_ops rc5t583_ops = { | |
5bb6936c AL |
89 | .is_enabled = regulator_is_enabled_regmap, |
90 | .enable = regulator_enable_regmap, | |
91 | .disable = regulator_disable_regmap, | |
6ffc3270 | 92 | .enable_time = rc5t583_regulator_enable_time, |
15b397d7 | 93 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
70e5f645 | 94 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
3209be17 | 95 | .list_voltage = regulator_list_voltage_linear, |
70e5f645 | 96 | .map_voltage = regulator_map_voltage_linear, |
6ffc3270 LD |
97 | .set_voltage_time_sel = rc5t583_set_voltage_time_sel, |
98 | }; | |
99 | ||
95e301ba AL |
100 | #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \ |
101 | _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \ | |
6ffc3270 | 102 | { \ |
6ffc3270 LD |
103 | .reg_disc_reg = RC5T583_REG_##_disc_reg, \ |
104 | .disc_bit = _disc_bit, \ | |
95e301ba | 105 | .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ |
6ffc3270 LD |
106 | .enable_uv_per_us = _enable_mv * 1000, \ |
107 | .change_uv_per_us = 40 * 1000, \ | |
108 | .deepsleep_id = RC5T583_DS_##_id, \ | |
109 | .desc = { \ | |
110 | .name = "rc5t583-regulator-"#_id, \ | |
111 | .id = RC5T583_REGULATOR_##_id, \ | |
e3a7384c | 112 | .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \ |
6ffc3270 LD |
113 | .ops = &rc5t583_ops, \ |
114 | .type = REGULATOR_VOLTAGE, \ | |
115 | .owner = THIS_MODULE, \ | |
15b397d7 AL |
116 | .vsel_reg = RC5T583_REG_##_id##DAC, \ |
117 | .vsel_mask = _vout_mask, \ | |
5bb6936c AL |
118 | .enable_reg = RC5T583_REG_##_en_reg, \ |
119 | .enable_mask = BIT(_en_bit), \ | |
3209be17 AL |
120 | .min_uV = _min_mv * 1000, \ |
121 | .uV_step = _step_uV, \ | |
6ffc3270 LD |
122 | }, \ |
123 | } | |
124 | ||
125 | static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = { | |
95e301ba AL |
126 | RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4), |
127 | RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14), | |
128 | RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14), | |
129 | RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14), | |
130 | RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160), | |
131 | RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160), | |
132 | RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160), | |
133 | RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160), | |
134 | RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133), | |
135 | RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267), | |
136 | RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133), | |
137 | RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233), | |
138 | RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233), | |
139 | RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133), | |
6ffc3270 LD |
140 | }; |
141 | ||
142 | static int __devinit rc5t583_regulator_probe(struct platform_device *pdev) | |
143 | { | |
144 | struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); | |
145 | struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev); | |
146 | struct regulator_init_data *reg_data; | |
c172708d | 147 | struct regulator_config config = { }; |
6ffc3270 LD |
148 | struct rc5t583_regulator *reg = NULL; |
149 | struct rc5t583_regulator *regs; | |
150 | struct regulator_dev *rdev; | |
151 | struct rc5t583_regulator_info *ri; | |
152 | int ret; | |
153 | int id; | |
154 | ||
155 | if (!pdata) { | |
156 | dev_err(&pdev->dev, "No platform data, exiting...\n"); | |
157 | return -ENODEV; | |
158 | } | |
159 | ||
160 | regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX * | |
161 | sizeof(struct rc5t583_regulator), GFP_KERNEL); | |
162 | if (!regs) { | |
163 | dev_err(&pdev->dev, "Memory allocation failed exiting..\n"); | |
164 | return -ENOMEM; | |
165 | } | |
166 | ||
167 | ||
168 | for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { | |
169 | reg_data = pdata->reg_init_data[id]; | |
170 | ||
171 | /* No need to register if there is no regulator data */ | |
172 | if (!reg_data) | |
173 | continue; | |
174 | ||
175 | reg = ®s[id]; | |
176 | ri = &rc5t583_reg_info[id]; | |
177 | reg->reg_info = ri; | |
178 | reg->mfd = rc5t583; | |
179 | reg->dev = &pdev->dev; | |
180 | ||
181 | if (ri->deepsleep_id == RC5T583_DS_NONE) | |
182 | goto skip_ext_pwr_config; | |
183 | ||
184 | ret = rc5t583_ext_power_req_config(rc5t583->dev, | |
185 | ri->deepsleep_id, | |
186 | pdata->regulator_ext_pwr_control[id], | |
187 | pdata->regulator_deepsleep_slot[id]); | |
188 | /* | |
189 | * Configuring external control is not a major issue, | |
190 | * just give warning. | |
191 | */ | |
192 | if (ret < 0) | |
193 | dev_warn(&pdev->dev, | |
194 | "Failed to configure ext control %d\n", id); | |
195 | ||
196 | skip_ext_pwr_config: | |
c172708d MB |
197 | config.dev = &pdev->dev; |
198 | config.init_data = reg_data; | |
199 | config.driver_data = reg; | |
5bb6936c | 200 | config.regmap = rc5t583->regmap; |
c172708d MB |
201 | |
202 | rdev = regulator_register(&ri->desc, &config); | |
a69df8a1 | 203 | if (IS_ERR(rdev)) { |
6ffc3270 LD |
204 | dev_err(&pdev->dev, "Failed to register regulator %s\n", |
205 | ri->desc.name); | |
206 | ret = PTR_ERR(rdev); | |
207 | goto clean_exit; | |
208 | } | |
209 | reg->rdev = rdev; | |
210 | } | |
211 | platform_set_drvdata(pdev, regs); | |
212 | return 0; | |
213 | ||
214 | clean_exit: | |
a69df8a1 | 215 | while (--id >= 0) |
6ffc3270 LD |
216 | regulator_unregister(regs[id].rdev); |
217 | ||
218 | return ret; | |
219 | } | |
220 | ||
221 | static int __devexit rc5t583_regulator_remove(struct platform_device *pdev) | |
222 | { | |
223 | struct rc5t583_regulator *regs = platform_get_drvdata(pdev); | |
224 | int id; | |
225 | ||
226 | for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) | |
227 | regulator_unregister(regs[id].rdev); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static struct platform_driver rc5t583_regulator_driver = { | |
232 | .driver = { | |
233 | .name = "rc5t583-regulator", | |
234 | .owner = THIS_MODULE, | |
235 | }, | |
236 | .probe = rc5t583_regulator_probe, | |
237 | .remove = __devexit_p(rc5t583_regulator_remove), | |
238 | }; | |
239 | ||
240 | static int __init rc5t583_regulator_init(void) | |
241 | { | |
242 | return platform_driver_register(&rc5t583_regulator_driver); | |
243 | } | |
244 | subsys_initcall(rc5t583_regulator_init); | |
245 | ||
246 | static void __exit rc5t583_regulator_exit(void) | |
247 | { | |
248 | platform_driver_unregister(&rc5t583_regulator_driver); | |
249 | } | |
250 | module_exit(rc5t583_regulator_exit); | |
251 | ||
252 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); | |
253 | MODULE_DESCRIPTION("RC5T583 regulator driver"); | |
254 | MODULE_ALIAS("platform:rc5t583-regulator"); | |
4eb06453 | 255 | MODULE_LICENSE("GPL v2"); |