Release 4.14 drivers/power/supply/axp20x_ac_power.c

Directory: drivers/power/supply
/*
 * AXP20X and AXP22X PMICs' ACIN power supply driver
 *
 * Copyright (C) 2016 Free Electrons
 *      Quentin Schulz <quentin.schulz@free-electrons.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#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/of_device.h>
#include <linux/platform_device.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 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;
};



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Quentin Schulz 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



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);
		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;

	default:
		return -EINVAL;
	}

	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Quentin Schulz 246 100.00% 1 100.00%
Total 246 100.00% 1 100.00%


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 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,
};


struct axp_data {
	
const struct power_supply_desc	*power_desc;
	
bool				acin_adc;
};


static const struct axp_data axp20x_data = {
	.power_desc = &axp20x_ac_power_desc,
	.acin_adc = true,
};


static const struct axp_data axp22x_data = {
	.power_desc = &axp22x_ac_power_desc,
	.acin_adc = false,
};



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;
	struct axp_data *axp_data;
	static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL",
		NULL };
	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;
	}

	power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL);
	if (!power)
		return -ENOMEM;

	axp_data = (struct axp_data *)of_device_get_match_data(&pdev->dev);

	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);

	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; irq_names[i]; i++) {
		irq = platform_get_irq_byname(pdev, irq_names[i]);
		if (irq < 0) {
			dev_warn(&pdev->dev, "No IRQ for %s: %d\n",
				 irq_names[i], irq);
			continue;
		}
		irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
		ret = devm_request_any_context_irq(&pdev->dev, irq,
						   axp20x_ac_power_irq, 0,
						   DRVNAME, power);
		if (ret < 0)
			dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n",
				 irq_names[i], ret);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Quentin Schulz 435 100.00% 1 100.00%
Total 435 100.00% 1 100.00%


static const struct of_device_id axp20x_ac_power_match[] = {
	{
		.compatible = "x-powers,axp202-ac-power-supply",
		.data = (void *)&axp20x_data,
        }, {
		.compatible = "x-powers,axp221-ac-power-supply",
		.data = (void *)&axp22x_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,
        },
};


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");
Overall Contributors
Person Tokens Prop Commits CommitProp
Quentin Schulz 1045 100.00% 1 100.00%
Total 1045 100.00% 1 100.00%
Directory: drivers/power/supply

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Quentin Schulz	30	100.00%	1	100.00%
Total	30	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 drivers/power/supply/axp20x_ac_power.c

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