1 | // SPDX-License-Identifier: GPL-2.0-only |
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 |
10 | */ |
11 | |
12 | #include <linux/module.h> |
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> |
19 | #include <linux/mfd/rc5t583.h> |
20 | |
21 | struct rc5t583_regulator_info { |
22 | int deepsleep_id; |
23 | |
24 | /* Regulator register address.*/ |
25 | uint8_t reg_disc_reg; |
26 | uint8_t disc_bit; |
27 | uint8_t deepsleep_reg; |
28 | |
29 | /* Regulator specific turn-on delay and voltage settling time*/ |
30 | int enable_uv_per_us; |
31 | |
32 | /* Used by regulator core */ |
33 | struct regulator_desc desc; |
34 | }; |
35 | |
36 | static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) |
37 | { |
38 | struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev); |
39 | int vsel = regulator_get_voltage_sel_regmap(rdev); |
40 | int curr_uV = regulator_list_voltage_linear(rdev, selector: vsel); |
41 | |
42 | return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us); |
43 | } |
44 | |
45 | static const struct regulator_ops rc5t583_ops = { |
46 | .is_enabled = regulator_is_enabled_regmap, |
47 | .enable = regulator_enable_regmap, |
48 | .disable = regulator_disable_regmap, |
49 | .enable_time = rc5t583_regulator_enable_time, |
50 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
51 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
52 | .list_voltage = regulator_list_voltage_linear, |
53 | .map_voltage = regulator_map_voltage_linear, |
54 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
55 | }; |
56 | |
57 | #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \ |
58 | _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \ |
59 | { \ |
60 | .reg_disc_reg = RC5T583_REG_##_disc_reg, \ |
61 | .disc_bit = _disc_bit, \ |
62 | .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ |
63 | .enable_uv_per_us = _enable_mv * 1000, \ |
64 | .deepsleep_id = RC5T583_DS_##_id, \ |
65 | .desc = { \ |
66 | .name = "rc5t583-regulator-"#_id, \ |
67 | .id = RC5T583_REGULATOR_##_id, \ |
68 | .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \ |
69 | .ops = &rc5t583_ops, \ |
70 | .type = REGULATOR_VOLTAGE, \ |
71 | .owner = THIS_MODULE, \ |
72 | .vsel_reg = RC5T583_REG_##_id##DAC, \ |
73 | .vsel_mask = _vout_mask, \ |
74 | .enable_reg = RC5T583_REG_##_en_reg, \ |
75 | .enable_mask = BIT(_en_bit), \ |
76 | .min_uV = _min_mv * 1000, \ |
77 | .uV_step = _step_uV, \ |
78 | .ramp_delay = 40 * 1000, \ |
79 | }, \ |
80 | } |
81 | |
82 | static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = { |
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), |
97 | }; |
98 | |
99 | static int rc5t583_regulator_probe(struct platform_device *pdev) |
100 | { |
101 | struct rc5t583 *rc5t583 = dev_get_drvdata(dev: pdev->dev.parent); |
102 | struct rc5t583_platform_data *pdata = dev_get_platdata(dev: rc5t583->dev); |
103 | struct regulator_config config = { }; |
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 | |
114 | for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { |
115 | ri = &rc5t583_reg_info[id]; |
116 | |
117 | if (ri->deepsleep_id == RC5T583_DS_NONE) |
118 | goto skip_ext_pwr_config; |
119 | |
120 | ret = rc5t583_ext_power_req_config(dev: rc5t583->dev, |
121 | deepsleep_id: ri->deepsleep_id, |
122 | ext_pwr_req: pdata->regulator_ext_pwr_control[id], |
123 | deepsleep_slot_nr: 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: |
133 | config.dev = &pdev->dev; |
134 | config.init_data = pdata->reg_init_data[id]; |
135 | config.driver_data = ri; |
136 | config.regmap = rc5t583->regmap; |
137 | |
138 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: &ri->desc, config: &config); |
139 | if (IS_ERR(ptr: rdev)) { |
140 | dev_err(&pdev->dev, "Failed to register regulator %s\n" , |
141 | ri->desc.name); |
142 | return PTR_ERR(ptr: rdev); |
143 | } |
144 | } |
145 | return 0; |
146 | } |
147 | |
148 | static struct platform_driver rc5t583_regulator_driver = { |
149 | .driver = { |
150 | .name = "rc5t583-regulator" , |
151 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
152 | }, |
153 | .probe = rc5t583_regulator_probe, |
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" ); |
171 | MODULE_LICENSE("GPL v2" ); |
172 | |