![Julia Lawall](/assets/img/avatar_default.png)
This driver creates two const structures that it stores in the data field of an of_device_id array. The data field of an of_device_id structure has type const void *, so there is no need for a const-discarding cast when putting const values into such a structure. Furthermore, adding const to the declaration of the location that receives a const value from such a field ensures that the compiler will continue to check that the value is not modified. The const-discarding cast on the extraction from the data field is thus no longer needed. Done using Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
254 lines
6.3 KiB
C
254 lines
6.3 KiB
C
/*
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* AXP20X and AXP22X PMICs' ACIN power supply driver
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*
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* Copyright (C) 2016 Free Electrons
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* Quentin Schulz <quentin.schulz@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/axp20x.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/iio/consumer.h>
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#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
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#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
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#define DRVNAME "axp20x-ac-power-supply"
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struct axp20x_ac_power {
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struct regmap *regmap;
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struct power_supply *supply;
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struct iio_channel *acin_v;
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struct iio_channel *acin_i;
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};
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static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
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{
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struct axp20x_ac_power *power = devid;
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power_supply_changed(power->supply);
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return IRQ_HANDLED;
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}
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static int axp20x_ac_power_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
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int ret, reg;
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switch (psp) {
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case POWER_SUPPLY_PROP_HEALTH:
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
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if (ret)
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return ret;
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if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {
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val->intval = POWER_SUPPLY_HEALTH_GOOD;
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return 0;
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}
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val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
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return 0;
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case POWER_SUPPLY_PROP_PRESENT:
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
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if (ret)
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return ret;
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val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);
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return 0;
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case POWER_SUPPLY_PROP_ONLINE:
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
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if (ret)
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return ret;
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val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);
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return 0;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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ret = iio_read_channel_processed(power->acin_v, &val->intval);
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if (ret)
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return ret;
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/* IIO framework gives mV but Power Supply framework gives uV */
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val->intval *= 1000;
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return 0;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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ret = iio_read_channel_processed(power->acin_i, &val->intval);
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if (ret)
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return ret;
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/* IIO framework gives mA but Power Supply framework gives uA */
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val->intval *= 1000;
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return 0;
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default:
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return -EINVAL;
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}
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return -EINVAL;
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}
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static enum power_supply_property axp20x_ac_power_properties[] = {
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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};
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static enum power_supply_property axp22x_ac_power_properties[] = {
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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};
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static const struct power_supply_desc axp20x_ac_power_desc = {
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.name = "axp20x-ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.properties = axp20x_ac_power_properties,
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.num_properties = ARRAY_SIZE(axp20x_ac_power_properties),
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.get_property = axp20x_ac_power_get_property,
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};
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static const struct power_supply_desc axp22x_ac_power_desc = {
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.name = "axp22x-ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.properties = axp22x_ac_power_properties,
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.num_properties = ARRAY_SIZE(axp22x_ac_power_properties),
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.get_property = axp20x_ac_power_get_property,
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};
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struct axp_data {
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const struct power_supply_desc *power_desc;
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bool acin_adc;
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};
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static const struct axp_data axp20x_data = {
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.power_desc = &axp20x_ac_power_desc,
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.acin_adc = true,
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};
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static const struct axp_data axp22x_data = {
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.power_desc = &axp22x_ac_power_desc,
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.acin_adc = false,
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};
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static int axp20x_ac_power_probe(struct platform_device *pdev)
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{
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struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
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struct power_supply_config psy_cfg = {};
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struct axp20x_ac_power *power;
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const struct axp_data *axp_data;
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static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL",
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NULL };
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int i, irq, ret;
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if (!of_device_is_available(pdev->dev.of_node))
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return -ENODEV;
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if (!axp20x) {
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dev_err(&pdev->dev, "Parent drvdata not set\n");
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return -EINVAL;
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}
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power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL);
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if (!power)
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return -ENOMEM;
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axp_data = of_device_get_match_data(&pdev->dev);
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if (axp_data->acin_adc) {
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power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
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if (IS_ERR(power->acin_v)) {
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if (PTR_ERR(power->acin_v) == -ENODEV)
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return -EPROBE_DEFER;
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return PTR_ERR(power->acin_v);
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}
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power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");
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if (IS_ERR(power->acin_i)) {
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if (PTR_ERR(power->acin_i) == -ENODEV)
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return -EPROBE_DEFER;
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return PTR_ERR(power->acin_i);
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}
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}
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power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
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platform_set_drvdata(pdev, power);
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psy_cfg.of_node = pdev->dev.of_node;
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psy_cfg.drv_data = power;
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power->supply = devm_power_supply_register(&pdev->dev,
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axp_data->power_desc,
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&psy_cfg);
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if (IS_ERR(power->supply))
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return PTR_ERR(power->supply);
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/* Request irqs after registering, as irqs may trigger immediately */
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for (i = 0; irq_names[i]; i++) {
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irq = platform_get_irq_byname(pdev, irq_names[i]);
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if (irq < 0) {
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dev_warn(&pdev->dev, "No IRQ for %s: %d\n",
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irq_names[i], irq);
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continue;
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}
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irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
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ret = devm_request_any_context_irq(&pdev->dev, irq,
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axp20x_ac_power_irq, 0,
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DRVNAME, power);
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if (ret < 0)
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dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n",
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irq_names[i], ret);
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}
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return 0;
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}
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static const struct of_device_id axp20x_ac_power_match[] = {
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{
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.compatible = "x-powers,axp202-ac-power-supply",
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.data = &axp20x_data,
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}, {
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.compatible = "x-powers,axp221-ac-power-supply",
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.data = &axp22x_data,
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}, { /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
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static struct platform_driver axp20x_ac_power_driver = {
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.probe = axp20x_ac_power_probe,
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.driver = {
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.name = DRVNAME,
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.of_match_table = axp20x_ac_power_match,
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},
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};
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module_platform_driver(axp20x_ac_power_driver);
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MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
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MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");
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MODULE_LICENSE("GPL");
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