power: supply: add AC power supply driver for AXP20X and AXP22X PMICs (744cc304) · Commits · 戴 / test

drivers/power/supply/Kconfig

+12 −0

Original line number	Diff line number	Diff line
		@@ -220,6 +220,18 @@ config BATTERY_DA9150
		This driver can also be built as a module. If so, the module will be
		called da9150-fg.

		config CHARGER_AXP20X
		tristate "X-Powers AXP20X and AXP22X AC power supply driver"
		depends on MFD_AXP20X
		depends on AXP20X_ADC
		depends on IIO
		help
		Say Y here to enable support for X-Powers AXP20X and AXP22X PMICs' AC
		power supply.

		This driver can also be built as a module. If so, the module will be
		called axp20x_ac_power.

		config AXP288_CHARGER
		tristate "X-Powers AXP288 Charger"
		depends on MFD_AXP20X && EXTCON_AXP288

drivers/power/supply/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o

		obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o
		obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o
		obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o
		obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
		obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
		obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o

drivers/power/supply/axp20x_ac_power.c

0 → 100644

+253 −0

Original line number	Diff line number	Diff line
		/*
		* 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;
		}

		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;
		}

		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;
		}

		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");

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