--- /dev/null
+/*
+ * 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, ®);
+ 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, ®);
+ 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, ®);
+ 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");
projects / platform / kernel / linux-rpi.git / commitdiff