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744cc304 QS |
1 | /* |
2 | * AXP20X and AXP22X PMICs' ACIN power supply driver | |
3 | * | |
4 | * Copyright (C) 2016 Free Electrons | |
5 | * Quentin Schulz <quentin.schulz@free-electrons.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/mfd/axp20x.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/power_supply.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/iio/consumer.h> | |
26 | ||
27 | #define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7) | |
28 | #define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6) | |
29 | ||
30 | #define DRVNAME "axp20x-ac-power-supply" | |
31 | ||
32 | struct axp20x_ac_power { | |
33 | struct regmap *regmap; | |
34 | struct power_supply *supply; | |
35 | struct iio_channel *acin_v; | |
36 | struct iio_channel *acin_i; | |
37 | }; | |
38 | ||
39 | static irqreturn_t axp20x_ac_power_irq(int irq, void *devid) | |
40 | { | |
41 | struct axp20x_ac_power *power = devid; | |
42 | ||
43 | power_supply_changed(power->supply); | |
44 | ||
45 | return IRQ_HANDLED; | |
46 | } | |
47 | ||
48 | static int axp20x_ac_power_get_property(struct power_supply *psy, | |
49 | enum power_supply_property psp, | |
50 | union power_supply_propval *val) | |
51 | { | |
52 | struct axp20x_ac_power *power = power_supply_get_drvdata(psy); | |
53 | int ret, reg; | |
54 | ||
55 | switch (psp) { | |
56 | case POWER_SUPPLY_PROP_HEALTH: | |
57 | ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); | |
58 | if (ret) | |
59 | return ret; | |
60 | ||
61 | if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) { | |
62 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
63 | return 0; | |
64 | } | |
65 | ||
66 | val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; | |
67 | return 0; | |
68 | ||
69 | case POWER_SUPPLY_PROP_PRESENT: | |
70 | ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); | |
71 | if (ret) | |
72 | return ret; | |
73 | ||
74 | val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT); | |
75 | return 0; | |
76 | ||
77 | case POWER_SUPPLY_PROP_ONLINE: | |
78 | ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); | |
79 | if (ret) | |
80 | return ret; | |
81 | ||
82 | val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL); | |
83 | return 0; | |
84 | ||
85 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
86 | ret = iio_read_channel_processed(power->acin_v, &val->intval); | |
87 | if (ret) | |
88 | return ret; | |
89 | ||
90 | /* IIO framework gives mV but Power Supply framework gives uV */ | |
91 | val->intval *= 1000; | |
92 | ||
93 | return 0; | |
94 | ||
95 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
96 | ret = iio_read_channel_processed(power->acin_i, &val->intval); | |
97 | if (ret) | |
98 | return ret; | |
99 | ||
100 | /* IIO framework gives mA but Power Supply framework gives uA */ | |
101 | val->intval *= 1000; | |
102 | ||
103 | return 0; | |
104 | ||
105 | default: | |
106 | return -EINVAL; | |
107 | } | |
108 | ||
109 | return -EINVAL; | |
110 | } | |
111 | ||
112 | static enum power_supply_property axp20x_ac_power_properties[] = { | |
113 | POWER_SUPPLY_PROP_HEALTH, | |
114 | POWER_SUPPLY_PROP_PRESENT, | |
115 | POWER_SUPPLY_PROP_ONLINE, | |
116 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
117 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
118 | }; | |
119 | ||
120 | static enum power_supply_property axp22x_ac_power_properties[] = { | |
121 | POWER_SUPPLY_PROP_HEALTH, | |
122 | POWER_SUPPLY_PROP_PRESENT, | |
123 | POWER_SUPPLY_PROP_ONLINE, | |
124 | }; | |
125 | ||
126 | static const struct power_supply_desc axp20x_ac_power_desc = { | |
127 | .name = "axp20x-ac", | |
128 | .type = POWER_SUPPLY_TYPE_MAINS, | |
129 | .properties = axp20x_ac_power_properties, | |
130 | .num_properties = ARRAY_SIZE(axp20x_ac_power_properties), | |
131 | .get_property = axp20x_ac_power_get_property, | |
132 | }; | |
133 | ||
134 | static const struct power_supply_desc axp22x_ac_power_desc = { | |
135 | .name = "axp22x-ac", | |
136 | .type = POWER_SUPPLY_TYPE_MAINS, | |
137 | .properties = axp22x_ac_power_properties, | |
138 | .num_properties = ARRAY_SIZE(axp22x_ac_power_properties), | |
139 | .get_property = axp20x_ac_power_get_property, | |
140 | }; | |
141 | ||
142 | struct axp_data { | |
143 | const struct power_supply_desc *power_desc; | |
144 | bool acin_adc; | |
145 | }; | |
146 | ||
147 | static const struct axp_data axp20x_data = { | |
148 | .power_desc = &axp20x_ac_power_desc, | |
149 | .acin_adc = true, | |
150 | }; | |
151 | ||
152 | static const struct axp_data axp22x_data = { | |
153 | .power_desc = &axp22x_ac_power_desc, | |
154 | .acin_adc = false, | |
155 | }; | |
156 | ||
157 | static int axp20x_ac_power_probe(struct platform_device *pdev) | |
158 | { | |
159 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
160 | struct power_supply_config psy_cfg = {}; | |
161 | struct axp20x_ac_power *power; | |
162 | struct axp_data *axp_data; | |
163 | static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL", | |
164 | NULL }; | |
165 | int i, irq, ret; | |
166 | ||
167 | if (!of_device_is_available(pdev->dev.of_node)) | |
168 | return -ENODEV; | |
169 | ||
170 | if (!axp20x) { | |
171 | dev_err(&pdev->dev, "Parent drvdata not set\n"); | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL); | |
176 | if (!power) | |
177 | return -ENOMEM; | |
178 | ||
179 | axp_data = (struct axp_data *)of_device_get_match_data(&pdev->dev); | |
180 | ||
181 | if (axp_data->acin_adc) { | |
182 | power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v"); | |
183 | if (IS_ERR(power->acin_v)) { | |
184 | if (PTR_ERR(power->acin_v) == -ENODEV) | |
185 | return -EPROBE_DEFER; | |
186 | return PTR_ERR(power->acin_v); | |
187 | } | |
188 | ||
189 | power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i"); | |
190 | if (IS_ERR(power->acin_i)) { | |
191 | if (PTR_ERR(power->acin_i) == -ENODEV) | |
192 | return -EPROBE_DEFER; | |
193 | return PTR_ERR(power->acin_i); | |
194 | } | |
195 | } | |
196 | ||
197 | power->regmap = dev_get_regmap(pdev->dev.parent, NULL); | |
198 | ||
199 | platform_set_drvdata(pdev, power); | |
200 | ||
201 | psy_cfg.of_node = pdev->dev.of_node; | |
202 | psy_cfg.drv_data = power; | |
203 | ||
204 | power->supply = devm_power_supply_register(&pdev->dev, | |
205 | axp_data->power_desc, | |
206 | &psy_cfg); | |
207 | if (IS_ERR(power->supply)) | |
208 | return PTR_ERR(power->supply); | |
209 | ||
210 | /* Request irqs after registering, as irqs may trigger immediately */ | |
211 | for (i = 0; irq_names[i]; i++) { | |
212 | irq = platform_get_irq_byname(pdev, irq_names[i]); | |
213 | if (irq < 0) { | |
214 | dev_warn(&pdev->dev, "No IRQ for %s: %d\n", | |
215 | irq_names[i], irq); | |
216 | continue; | |
217 | } | |
218 | irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq); | |
219 | ret = devm_request_any_context_irq(&pdev->dev, irq, | |
220 | axp20x_ac_power_irq, 0, | |
221 | DRVNAME, power); | |
222 | if (ret < 0) | |
223 | dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n", | |
224 | irq_names[i], ret); | |
225 | } | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static const struct of_device_id axp20x_ac_power_match[] = { | |
231 | { | |
232 | .compatible = "x-powers,axp202-ac-power-supply", | |
233 | .data = (void *)&axp20x_data, | |
234 | }, { | |
235 | .compatible = "x-powers,axp221-ac-power-supply", | |
236 | .data = (void *)&axp22x_data, | |
237 | }, { /* sentinel */ } | |
238 | }; | |
239 | MODULE_DEVICE_TABLE(of, axp20x_ac_power_match); | |
240 | ||
241 | static struct platform_driver axp20x_ac_power_driver = { | |
242 | .probe = axp20x_ac_power_probe, | |
243 | .driver = { | |
244 | .name = DRVNAME, | |
245 | .of_match_table = axp20x_ac_power_match, | |
246 | }, | |
247 | }; | |
248 | ||
249 | module_platform_driver(axp20x_ac_power_driver); | |
250 | ||
251 | MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); | |
252 | MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver"); | |
253 | MODULE_LICENSE("GPL"); |