diff options
Diffstat (limited to 'drivers/power/gpio-charger.c')
| -rw-r--r-- | drivers/power/gpio-charger.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c deleted file mode 100644 index 4e858a23568f..000000000000 --- a/drivers/power/gpio-charger.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> - * Driver for chargers which report their online status through a GPIO pin - * - * 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. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/device.h> -#include <linux/gpio.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/power_supply.h> -#include <linux/slab.h> - -#include <linux/power/gpio-charger.h> - -struct gpio_charger { - const struct gpio_charger_platform_data *pdata; - unsigned int irq; - - struct power_supply charger; -}; - -static irqreturn_t gpio_charger_irq(int irq, void *devid) -{ - struct power_supply *charger = devid; - - power_supply_changed(charger); - - return IRQ_HANDLED; -} - -static inline struct gpio_charger *psy_to_gpio_charger(struct power_supply *psy) -{ - return container_of(psy, struct gpio_charger, charger); -} - -static int gpio_charger_get_property(struct power_supply *psy, - enum power_supply_property psp, union power_supply_propval *val) -{ - struct gpio_charger *gpio_charger = psy_to_gpio_charger(psy); - const struct gpio_charger_platform_data *pdata = gpio_charger->pdata; - - switch (psp) { - case POWER_SUPPLY_PROP_ONLINE: - val->intval = gpio_get_value_cansleep(pdata->gpio); - val->intval ^= pdata->gpio_active_low; - break; - default: - return -EINVAL; - } - - return 0; -} - -static enum power_supply_property gpio_charger_properties[] = { - POWER_SUPPLY_PROP_ONLINE, -}; - -static int gpio_charger_probe(struct platform_device *pdev) -{ - const struct gpio_charger_platform_data *pdata = pdev->dev.platform_data; - struct gpio_charger *gpio_charger; - struct power_supply *charger; - int ret; - int irq; - - if (!pdata) { - dev_err(&pdev->dev, "No platform data\n"); - return -EINVAL; - } - - if (!gpio_is_valid(pdata->gpio)) { - dev_err(&pdev->dev, "Invalid gpio pin\n"); - return -EINVAL; - } - - gpio_charger = devm_kzalloc(&pdev->dev, sizeof(*gpio_charger), - GFP_KERNEL); - if (!gpio_charger) { - dev_err(&pdev->dev, "Failed to alloc driver structure\n"); - return -ENOMEM; - } - - charger = &gpio_charger->charger; - - charger->name = pdata->name ? pdata->name : "gpio-charger"; - charger->type = pdata->type; - charger->properties = gpio_charger_properties; - charger->num_properties = ARRAY_SIZE(gpio_charger_properties); - charger->get_property = gpio_charger_get_property; - charger->supplied_to = pdata->supplied_to; - charger->num_supplicants = pdata->num_supplicants; - - ret = gpio_request(pdata->gpio, dev_name(&pdev->dev)); - if (ret) { - dev_err(&pdev->dev, "Failed to request gpio pin: %d\n", ret); - goto err_free; - } - ret = gpio_direction_input(pdata->gpio); - if (ret) { - dev_err(&pdev->dev, "Failed to set gpio to input: %d\n", ret); - goto err_gpio_free; - } - - gpio_charger->pdata = pdata; - - ret = power_supply_register(&pdev->dev, charger); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to register power supply: %d\n", - ret); - goto err_gpio_free; - } - - irq = gpio_to_irq(pdata->gpio); - if (irq > 0) { - ret = request_any_context_irq(irq, gpio_charger_irq, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - dev_name(&pdev->dev), charger); - if (ret < 0) - dev_warn(&pdev->dev, "Failed to request irq: %d\n", ret); - else - gpio_charger->irq = irq; - } - - platform_set_drvdata(pdev, gpio_charger); - - return 0; - -err_gpio_free: - gpio_free(pdata->gpio); -err_free: - return ret; -} - -static int gpio_charger_remove(struct platform_device *pdev) -{ - struct gpio_charger *gpio_charger = platform_get_drvdata(pdev); - - if (gpio_charger->irq) - free_irq(gpio_charger->irq, &gpio_charger->charger); - - power_supply_unregister(&gpio_charger->charger); - - gpio_free(gpio_charger->pdata->gpio); - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int gpio_charger_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct gpio_charger *gpio_charger = platform_get_drvdata(pdev); - - power_supply_changed(&gpio_charger->charger); - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, NULL, gpio_charger_resume); - -static struct platform_driver gpio_charger_driver = { - .probe = gpio_charger_probe, - .remove = gpio_charger_remove, - .driver = { - .name = "gpio-charger", - .owner = THIS_MODULE, - .pm = &gpio_charger_pm_ops, - }, -}; - -module_platform_driver(gpio_charger_driver); - -MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); -MODULE_DESCRIPTION("Driver for chargers which report their online status through a GPIO"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:gpio-charger"); |