summaryrefslogtreecommitdiffstats
path: root/drivers/power/supply/axp20x_ac_power.c
blob: 19a1186331157b56c79e3eb2c8d72b228ab7513f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AXP20X and AXP22X PMICs' ACIN power supply driver
 *
 * Copyright (C) 2016 Free Electrons
 *	Quentin Schulz <quentin.schulz@free-electrons.com>
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>

#define AXP20X_PWR_STATUS_ACIN_PRESENT	BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL	BIT(6)

#define AXP813_ACIN_PATH_SEL		BIT(7)
#define AXP813_ACIN_PATH_SEL_TO_BIT(x)	(!!(x) << 7)

#define AXP813_VHOLD_MASK		GENMASK(5, 3)
#define AXP813_VHOLD_UV_TO_BIT(x)	((((x) / 100000) - 40) << 3)
#define AXP813_VHOLD_REG_TO_UV(x)	\
	(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)

#define AXP813_CURR_LIMIT_MASK		GENMASK(2, 0)
#define AXP813_CURR_LIMIT_UA_TO_BIT(x)	(((x) / 500000) - 3)
#define AXP813_CURR_LIMIT_REG_TO_UA(x)	\
	((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)

#define DRVNAME "axp20x-ac-power-supply"

struct axp20x_ac_power {
	struct regmap *regmap;
	struct power_supply *supply;
	struct iio_channel *acin_v;
	struct iio_channel *acin_i;
	bool has_acin_path_sel;
	unsigned int num_irqs;
	unsigned int irqs[];
};

static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
{
	struct axp20x_ac_power *power = devid;

	power_supply_changed(power->supply);

	return IRQ_HANDLED;
}

static int axp20x_ac_power_get_property(struct power_supply *psy,
					enum power_supply_property psp,
					union power_supply_propval *val)
{
	struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
	int ret, reg;

	switch (psp) {
	case POWER_SUPPLY_PROP_HEALTH:
		ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &reg);
		if (ret)
			return ret;

		if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
			return 0;
		}

		val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
		return 0;

	case POWER_SUPPLY_PROP_PRESENT:
		ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &reg);
		if (ret)
			return ret;

		val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);
		return 0;

	case POWER_SUPPLY_PROP_ONLINE:
		ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &reg);
		if (ret)
			return ret;

		val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);

		/* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */
		if (val->intval && power->has_acin_path_sel) {
			ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL,
					  &reg);
			if (ret)
				return ret;

			val->intval = !!(reg & AXP813_ACIN_PATH_SEL);
		}

		return 0;

	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = iio_read_channel_processed(power->acin_v, &val->intval);
		if (ret)
			return ret;

		/* IIO framework gives mV but Power Supply framework gives uV */
		val->intval *= 1000;

		return 0;

	case POWER_SUPPLY_PROP_CURRENT_NOW:
		ret = iio_read_channel_processed(power->acin_i, &val->intval);
		if (ret)
			return ret;

		/* IIO framework gives mA but Power Supply framework gives uA */
		val->intval *= 1000;

		return 0;

	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
		ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
		if (ret)
			return ret;

		val->intval = AXP813_VHOLD_REG_TO_UV(reg);

		return 0;

	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
		ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
		if (ret)
			return ret;

		val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);
		/* AXP813 datasheet defines values 11x as 4000mA */
		if (val->intval > 4000000)
			val->intval = 4000000;

		return 0;

	default:
		return -EINVAL;
	}

	return -EINVAL;
}

static int axp813_ac_power_set_property(struct power_supply *psy,
					enum power_supply_property psp,
					const union power_supply_propval *val)
{
	struct axp20x_ac_power *power = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
					  AXP813_ACIN_PATH_SEL,
					  AXP813_ACIN_PATH_SEL_TO_BIT(val->intval));

	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
		if (val->intval < 4000000 || val->intval > 4700000)
			return -EINVAL;

		return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
					  AXP813_VHOLD_MASK,
					  AXP813_VHOLD_UV_TO_BIT(val->intval));

	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
		if (val->intval < 1500000 || val->intval > 4000000)
			return -EINVAL;

		return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
					  AXP813_CURR_LIMIT_MASK,
					  AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));

	default:
		return -EINVAL;
	}

	return -EINVAL;
}

static int axp813_ac_power_prop_writeable(struct power_supply *psy,
					  enum power_supply_property psp)
{
	return psp == POWER_SUPPLY_PROP_ONLINE ||
	       psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
	       psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}

static enum power_supply_property axp20x_ac_power_properties[] = {
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
};

static enum power_supply_property axp22x_ac_power_properties[] = {
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
};

static enum power_supply_property axp813_ac_power_properties[] = {
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_VOLTAGE_MIN,
	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};

static const struct power_supply_desc axp20x_ac_power_desc = {
	.name = "axp20x-ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.properties = axp20x_ac_power_properties,
	.num_properties = ARRAY_SIZE(axp20x_ac_power_properties),
	.get_property = axp20x_ac_power_get_property,
};

static const struct power_supply_desc axp22x_ac_power_desc = {
	.name = "axp22x-ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.properties = axp22x_ac_power_properties,
	.num_properties = ARRAY_SIZE(axp22x_ac_power_properties),
	.get_property = axp20x_ac_power_get_property,
};

static const struct power_supply_desc axp813_ac_power_desc = {
	.name = "axp813-ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.properties = axp813_ac_power_properties,
	.num_properties = ARRAY_SIZE(axp813_ac_power_properties),
	.property_is_writeable = axp813_ac_power_prop_writeable,
	.get_property = axp20x_ac_power_get_property,
	.set_property = axp813_ac_power_set_property,
};

static const char * const axp20x_irq_names[] = {
	"ACIN_PLUGIN",
	"ACIN_REMOVAL",
};

struct axp_data {
	const struct power_supply_desc	*power_desc;
	const char * const		*irq_names;
	unsigned int			num_irq_names;
	bool				acin_adc;
	bool				acin_path_sel;
};

static const struct axp_data axp20x_data = {
	.power_desc	= &axp20x_ac_power_desc,
	.irq_names	= axp20x_irq_names,
	.num_irq_names	= ARRAY_SIZE(axp20x_irq_names),
	.acin_adc	= true,
	.acin_path_sel	= false,
};

static const struct axp_data axp22x_data = {
	.power_desc	= &axp22x_ac_power_desc,
	.irq_names	= axp20x_irq_names,
	.num_irq_names	= ARRAY_SIZE(axp20x_irq_names),
	.acin_adc	= false,
	.acin_path_sel	= false,
};

static const struct axp_data axp813_data = {
	.power_desc	= &axp813_ac_power_desc,
	.irq_names	= axp20x_irq_names,
	.num_irq_names	= ARRAY_SIZE(axp20x_irq_names),
	.acin_adc	= false,
	.acin_path_sel	= true,
};

#ifdef CONFIG_PM_SLEEP
static int axp20x_ac_power_suspend(struct device *dev)
{
	struct axp20x_ac_power *power = dev_get_drvdata(dev);
	int i = 0;

	/*
	 * Allow wake via ACIN_PLUGIN only.
	 *
	 * As nested threaded IRQs are not automatically disabled during
	 * suspend, we must explicitly disable the remainder of the IRQs.
	 */
	if (device_may_wakeup(&power->supply->dev))
		enable_irq_wake(power->irqs[i++]);
	while (i < power->num_irqs)
		disable_irq(power->irqs[i++]);

	return 0;
}

static int axp20x_ac_power_resume(struct device *dev)
{
	struct axp20x_ac_power *power = dev_get_drvdata(dev);
	int i = 0;

	if (device_may_wakeup(&power->supply->dev))
		disable_irq_wake(power->irqs[i++]);
	while (i < power->num_irqs)
		enable_irq(power->irqs[i++]);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend,
						 axp20x_ac_power_resume);

static int axp20x_ac_power_probe(struct platform_device *pdev)
{
	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
	struct power_supply_config psy_cfg = {};
	struct axp20x_ac_power *power;
	const struct axp_data *axp_data;
	int i, irq, ret;

	if (!of_device_is_available(pdev->dev.of_node))
		return -ENODEV;

	if (!axp20x) {
		dev_err(&pdev->dev, "Parent drvdata not set\n");
		return -EINVAL;
	}

	axp_data = of_device_get_match_data(&pdev->dev);

	power = devm_kzalloc(&pdev->dev,
			     struct_size(power, irqs, axp_data->num_irq_names),
			     GFP_KERNEL);
	if (!power)
		return -ENOMEM;

	if (axp_data->acin_adc) {
		power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
		if (IS_ERR(power->acin_v)) {
			if (PTR_ERR(power->acin_v) == -ENODEV)
				return -EPROBE_DEFER;
			return PTR_ERR(power->acin_v);
		}

		power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");
		if (IS_ERR(power->acin_i)) {
			if (PTR_ERR(power->acin_i) == -ENODEV)
				return -EPROBE_DEFER;
			return PTR_ERR(power->acin_i);
		}
	}

	power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	power->has_acin_path_sel = axp_data->acin_path_sel;
	power->num_irqs = axp_data->num_irq_names;

	platform_set_drvdata(pdev, power);

	psy_cfg.of_node = pdev->dev.of_node;
	psy_cfg.drv_data = power;

	power->supply = devm_power_supply_register(&pdev->dev,
						   axp_data->power_desc,
						   &psy_cfg);
	if (IS_ERR(power->supply))
		return PTR_ERR(power->supply);

	/* Request irqs after registering, as irqs may trigger immediately */
	for (i = 0; i < axp_data->num_irq_names; i++) {
		irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
		if (irq < 0)
			return irq;

		power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
		ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
						   axp20x_ac_power_irq, 0,
						   DRVNAME, power);
		if (ret < 0) {
			dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
				axp_data->irq_names[i], ret);
			return ret;
		}
	}

	return 0;
}

static const struct of_device_id axp20x_ac_power_match[] = {
	{
		.compatible = "x-powers,axp202-ac-power-supply",
		.data = &axp20x_data,
	}, {
		.compatible = "x-powers,axp221-ac-power-supply",
		.data = &axp22x_data,
	}, {
		.compatible = "x-powers,axp813-ac-power-supply",
		.data = &axp813_data,
	}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);

static struct platform_driver axp20x_ac_power_driver = {
	.probe = axp20x_ac_power_probe,
	.driver = {
		.name		= DRVNAME,
		.of_match_table	= axp20x_ac_power_match,
		.pm		= &axp20x_ac_power_pm_ops,
	},
};

module_platform_driver(axp20x_ac_power_driver);

MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");
MODULE_LICENSE("GPL");