Commit | Line | Data |
---|---|---|
0fc31d8f HG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Regulator driver for TPS68470 PMIC | |
4 | // | |
5 | // Copyright (c) 2021 Red Hat Inc. | |
6 | // Copyright (C) 2018 Intel Corporation | |
7 | // | |
8 | // Authors: | |
9 | // Hans de Goede <hdegoede@redhat.com> | |
10 | // Zaikuo Wang <zaikuo.wang@intel.com> | |
11 | // Tianshu Qiu <tian.shu.qiu@intel.com> | |
12 | // Jian Xu Zheng <jian.xu.zheng@intel.com> | |
13 | // Yuning Pu <yuning.pu@intel.com> | |
14 | // Rajmohan Mani <rajmohan.mani@intel.com> | |
15 | ||
16 | #include <linux/clk.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mfd/tps68470.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/platform_data/tps68470.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/regulator/driver.h> | |
26 | #include <linux/regulator/machine.h> | |
27 | ||
28 | struct tps68470_regulator_data { | |
29 | struct clk *clk; | |
30 | }; | |
31 | ||
32 | #define TPS68470_REGULATOR(_name, _id, _ops, _n, \ | |
33 | _vr, _vm, _er, _em, _lr, _nlr) \ | |
34 | [TPS68470_ ## _name] = { \ | |
35 | .name = # _name, \ | |
36 | .id = _id, \ | |
37 | .ops = &_ops, \ | |
38 | .n_voltages = _n, \ | |
39 | .type = REGULATOR_VOLTAGE, \ | |
40 | .owner = THIS_MODULE, \ | |
41 | .vsel_reg = _vr, \ | |
42 | .vsel_mask = _vm, \ | |
43 | .enable_reg = _er, \ | |
44 | .enable_mask = _em, \ | |
45 | .linear_ranges = _lr, \ | |
46 | .n_linear_ranges = _nlr, \ | |
47 | } | |
48 | ||
49 | static const struct linear_range tps68470_ldo_ranges[] = { | |
50 | REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800), | |
51 | }; | |
52 | ||
53 | static const struct linear_range tps68470_core_ranges[] = { | |
54 | REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000), | |
55 | }; | |
56 | ||
57 | static int tps68470_regulator_enable(struct regulator_dev *rdev) | |
58 | { | |
59 | struct tps68470_regulator_data *data = rdev->reg_data; | |
60 | int ret; | |
61 | ||
62 | /* The Core buck regulator needs the PMIC's PLL to be enabled */ | |
63 | if (rdev->desc->id == TPS68470_CORE) { | |
64 | ret = clk_prepare_enable(data->clk); | |
65 | if (ret) { | |
66 | dev_err(&rdev->dev, "Error enabling TPS68470 clock\n"); | |
67 | return ret; | |
68 | } | |
69 | } | |
70 | ||
71 | return regulator_enable_regmap(rdev); | |
72 | } | |
73 | ||
74 | static int tps68470_regulator_disable(struct regulator_dev *rdev) | |
75 | { | |
76 | struct tps68470_regulator_data *data = rdev->reg_data; | |
77 | ||
78 | if (rdev->desc->id == TPS68470_CORE) | |
79 | clk_disable_unprepare(data->clk); | |
80 | ||
81 | return regulator_disable_regmap(rdev); | |
82 | } | |
83 | ||
84 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ | |
85 | static const struct regulator_ops tps68470_regulator_ops = { | |
86 | .is_enabled = regulator_is_enabled_regmap, | |
87 | .enable = tps68470_regulator_enable, | |
88 | .disable = tps68470_regulator_disable, | |
89 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
90 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
91 | .list_voltage = regulator_list_voltage_linear_range, | |
92 | .map_voltage = regulator_map_voltage_linear_range, | |
93 | }; | |
94 | ||
95 | static const struct regulator_ops tps68470_always_on_reg_ops = { | |
96 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
97 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
98 | .list_voltage = regulator_list_voltage_linear_range, | |
99 | .map_voltage = regulator_map_voltage_linear_range, | |
100 | }; | |
101 | ||
102 | static const struct regulator_desc regulators[] = { | |
103 | TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43, | |
104 | TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK, | |
105 | TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK, | |
106 | tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)), | |
107 | TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126, | |
108 | TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK, | |
109 | TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK, | |
110 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
111 | TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126, | |
112 | TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK, | |
113 | TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK, | |
114 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
115 | TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126, | |
116 | TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK, | |
117 | 0, 0, | |
118 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
119 | /* | |
120 | * (1) This regulator must have the same voltage as VIO if S_IO LDO is used to | |
121 | * power a sensor/VCM which I2C is daisy chained behind the PMIC. | |
122 | * (2) If there is no I2C daisy chain it can be set freely. | |
123 | */ | |
124 | TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126, | |
125 | TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK, | |
126 | TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK, | |
127 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
128 | TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126, | |
129 | TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK, | |
130 | TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK, | |
131 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
132 | TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126, | |
133 | TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK, | |
134 | TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK, | |
135 | tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), | |
136 | }; | |
137 | ||
138 | static int tps68470_regulator_probe(struct platform_device *pdev) | |
139 | { | |
140 | struct device *dev = &pdev->dev; | |
141 | struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev); | |
142 | struct tps68470_regulator_data *data; | |
143 | struct regulator_config config = { }; | |
144 | struct regulator_dev *rdev; | |
145 | int i; | |
146 | ||
147 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
148 | if (!data) | |
149 | return -ENOMEM; | |
150 | ||
151 | data->clk = devm_clk_get(dev, "tps68470-clk"); | |
152 | if (IS_ERR(data->clk)) | |
153 | return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n"); | |
154 | ||
155 | config.dev = dev->parent; | |
156 | config.regmap = dev_get_drvdata(dev->parent); | |
157 | config.driver_data = data; | |
158 | ||
159 | for (i = 0; i < TPS68470_NUM_REGULATORS; i++) { | |
160 | if (pdata) | |
161 | config.init_data = pdata->reg_init_data[i]; | |
162 | else | |
163 | config.init_data = NULL; | |
164 | ||
165 | rdev = devm_regulator_register(dev, ®ulators[i], &config); | |
166 | if (IS_ERR(rdev)) | |
167 | return dev_err_probe(dev, PTR_ERR(rdev), | |
168 | "registering %s regulator\n", | |
169 | regulators[i].name); | |
170 | } | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static struct platform_driver tps68470_regulator_driver = { | |
176 | .driver = { | |
177 | .name = "tps68470-regulator", | |
41cff178 | 178 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
0fc31d8f HG |
179 | }, |
180 | .probe = tps68470_regulator_probe, | |
181 | }; | |
182 | ||
183 | /* | |
184 | * The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers | |
185 | * registering before the drivers for the camera-sensors which use them bind. | |
186 | * subsys_initcall() ensures this when the drivers are builtin. | |
187 | */ | |
188 | static int __init tps68470_regulator_init(void) | |
189 | { | |
190 | return platform_driver_register(&tps68470_regulator_driver); | |
191 | } | |
192 | subsys_initcall(tps68470_regulator_init); | |
193 | ||
194 | static void __exit tps68470_regulator_exit(void) | |
195 | { | |
196 | platform_driver_unregister(&tps68470_regulator_driver); | |
197 | } | |
198 | module_exit(tps68470_regulator_exit); | |
199 | ||
200 | MODULE_ALIAS("platform:tps68470-regulator"); | |
201 | MODULE_DESCRIPTION("TPS68470 voltage regulator driver"); | |
202 | MODULE_LICENSE("GPL v2"); |