diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/power/Makefile | 2 | ||||
| -rw-r--r-- | drivers/power/palmtx_battery.c | 198 | ||||
| -rw-r--r-- | drivers/power/wm97xx_battery.c | 272 |
4 files changed, 277 insertions, 203 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 9ce55850271a..63bb57910445 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -56,10 +56,10 @@ config BATTERY_TOSA Say Y to enable support for the battery on the Sharp Zaurus SL-6000 (tosa) models. -config BATTERY_PALMTX - tristate "Palm T|X battery" - depends on MACH_PALMTX +config BATTERY_WM97XX + bool "WM97xx generic battery driver" + depends on TOUCHSCREEN_WM97XX=y help - Say Y to enable support for the battery in Palm T|X. + Say Y to enable support for battery measured by WM97xx aux port. endif # POWER_SUPPLY diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 4706bf8ff459..4e20026cc45a 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -21,4 +21,4 @@ obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o -obj-$(CONFIG_BATTERY_PALMTX) += palmtx_battery.o +obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
\ No newline at end of file diff --git a/drivers/power/palmtx_battery.c b/drivers/power/palmtx_battery.c deleted file mode 100644 index 7035bfa41c62..000000000000 --- a/drivers/power/palmtx_battery.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * linux/drivers/power/palmtx_battery.c - * - * Battery measurement code for Palm T|X Handheld computer - * - * based on tosa_battery.c - * - * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/power_supply.h> -#include <linux/wm97xx.h> -#include <linux/delay.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/gpio.h> - -#include <asm/mach-types.h> -#include <mach/palmtx.h> - -static DEFINE_MUTEX(bat_lock); -static struct work_struct bat_work; -struct mutex work_lock; -int bat_status = POWER_SUPPLY_STATUS_DISCHARGING; - -static unsigned long palmtx_read_bat(struct power_supply *bat_ps) -{ - return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data, - WM97XX_AUX_ID3) * 1000 / 414; -} - -static unsigned long palmtx_read_temp(struct power_supply *bat_ps) -{ - return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data, - WM97XX_AUX_ID2); -} - -static int palmtx_bat_get_property(struct power_supply *bat_ps, - enum power_supply_property psp, - union power_supply_propval *val) -{ - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - val->intval = bat_status; - break; - case POWER_SUPPLY_PROP_TECHNOLOGY: - val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO; - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - val->intval = palmtx_read_bat(bat_ps); - break; - case POWER_SUPPLY_PROP_VOLTAGE_MAX: - case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: - val->intval = PALMTX_BAT_MAX_VOLTAGE; - break; - case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: - val->intval = PALMTX_BAT_MIN_VOLTAGE; - break; - case POWER_SUPPLY_PROP_TEMP: - val->intval = palmtx_read_temp(bat_ps); - break; - case POWER_SUPPLY_PROP_PRESENT: - val->intval = 1; - break; - default: - return -EINVAL; - } - return 0; -} - -static void palmtx_bat_external_power_changed(struct power_supply *bat_ps) -{ - schedule_work(&bat_work); -} - -static char *status_text[] = { - [POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown", - [POWER_SUPPLY_STATUS_CHARGING] = "Charging", - [POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging", -}; - -static void palmtx_bat_update(struct power_supply *bat_ps) -{ - int old_status = bat_status; - - mutex_lock(&work_lock); - - bat_status = gpio_get_value(GPIO_NR_PALMTX_POWER_DETECT) ? - POWER_SUPPLY_STATUS_CHARGING : - POWER_SUPPLY_STATUS_DISCHARGING; - - if (old_status != bat_status) { - pr_debug("%s %s -> %s\n", bat_ps->name, - status_text[old_status], - status_text[bat_status]); - power_supply_changed(bat_ps); - } - - mutex_unlock(&work_lock); -} - -static enum power_supply_property palmtx_bat_main_props[] = { - POWER_SUPPLY_PROP_STATUS, - POWER_SUPPLY_PROP_TECHNOLOGY, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_VOLTAGE_MAX, - POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, - POWER_SUPPLY_PROP_TEMP, - POWER_SUPPLY_PROP_PRESENT, -}; - -struct power_supply bat_ps = { - .name = "main-battery", - .type = POWER_SUPPLY_TYPE_BATTERY, - .properties = palmtx_bat_main_props, - .num_properties = ARRAY_SIZE(palmtx_bat_main_props), - .get_property = palmtx_bat_get_property, - .external_power_changed = palmtx_bat_external_power_changed, - .use_for_apm = 1, -}; - -static void palmtx_bat_work(struct work_struct *work) -{ - palmtx_bat_update(&bat_ps); -} - -#ifdef CONFIG_PM -static int palmtx_bat_suspend(struct platform_device *dev, pm_message_t state) -{ - flush_scheduled_work(); - return 0; -} - -static int palmtx_bat_resume(struct platform_device *dev) -{ - schedule_work(&bat_work); - return 0; -} -#else -#define palmtx_bat_suspend NULL -#define palmtx_bat_resume NULL -#endif - -static int __devinit palmtx_bat_probe(struct platform_device *dev) -{ - int ret = 0; - - if (!machine_is_palmtx()) - return -ENODEV; - - mutex_init(&work_lock); - - INIT_WORK(&bat_work, palmtx_bat_work); - - ret = power_supply_register(&dev->dev, &bat_ps); - if (!ret) - schedule_work(&bat_work); - - return ret; -} - -static int __devexit palmtx_bat_remove(struct platform_device *dev) -{ - power_supply_unregister(&bat_ps); - return 0; -} - -static struct platform_driver palmtx_bat_driver = { - .driver.name = "wm97xx-battery", - .driver.owner = THIS_MODULE, - .probe = palmtx_bat_probe, - .remove = __devexit_p(palmtx_bat_remove), - .suspend = palmtx_bat_suspend, - .resume = palmtx_bat_resume, -}; - -static int __init palmtx_bat_init(void) -{ - return platform_driver_register(&palmtx_bat_driver); -} - -static void __exit palmtx_bat_exit(void) -{ - platform_driver_unregister(&palmtx_bat_driver); -} - -module_init(palmtx_bat_init); -module_exit(palmtx_bat_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); -MODULE_DESCRIPTION("Palm T|X battery driver"); diff --git a/drivers/power/wm97xx_battery.c b/drivers/power/wm97xx_battery.c new file mode 100644 index 000000000000..8bde92126d34 --- /dev/null +++ b/drivers/power/wm97xx_battery.c @@ -0,0 +1,272 @@ +/* + * linux/drivers/power/wm97xx_battery.c + * + * Battery measurement code for WM97xx + * + * based on tosa_battery.c + * + * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> +#include <linux/wm97xx.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/wm97xx_batt.h> + +static DEFINE_MUTEX(bat_lock); +static struct work_struct bat_work; +struct mutex work_lock; +static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN; +static struct wm97xx_batt_info *pdata; +static enum power_supply_property *prop; + +static unsigned long wm97xx_read_bat(struct power_supply *bat_ps) +{ + return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data, + pdata->batt_aux) * pdata->batt_mult / + pdata->batt_div; +} + +static unsigned long wm97xx_read_temp(struct power_supply *bat_ps) +{ + return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data, + pdata->temp_aux) * pdata->temp_mult / + pdata->temp_div; +} + +static int wm97xx_bat_get_property(struct power_supply *bat_ps, + enum power_supply_property psp, + union power_supply_propval *val) +{ + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + val->intval = bat_status; + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = pdata->batt_tech; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + if (pdata->batt_aux >= 0) + val->intval = wm97xx_read_bat(bat_ps); + else + return -EINVAL; + break; + case POWER_SUPPLY_PROP_TEMP: + if (pdata->temp_aux >= 0) + val->intval = wm97xx_read_temp(bat_ps); + else + return -EINVAL; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + if (pdata->max_voltage >= 0) + val->intval = pdata->max_voltage; + else + return -EINVAL; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + if (pdata->min_voltage >= 0) + val->intval = pdata->min_voltage; + else + return -EINVAL; + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = 1; + break; + default: + return -EINVAL; + } + return 0; +} + +static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps) +{ + schedule_work(&bat_work); +} + +static void wm97xx_bat_update(struct power_supply *bat_ps) +{ + int old_status = bat_status; + + mutex_lock(&work_lock); + + bat_status = (pdata->charge_gpio >= 0) ? + (gpio_get_value(pdata->charge_gpio) ? + POWER_SUPPLY_STATUS_DISCHARGING : + POWER_SUPPLY_STATUS_CHARGING) : + POWER_SUPPLY_STATUS_UNKNOWN; + + if (old_status != bat_status) { + pr_debug("%s: %i -> %i\n", bat_ps->name, old_status, + bat_status); + power_supply_changed(bat_ps); + } + + mutex_unlock(&work_lock); +} + +static struct power_supply bat_ps = { + .type = POWER_SUPPLY_TYPE_BATTERY, + .get_property = wm97xx_bat_get_property, + .external_power_changed = wm97xx_bat_external_power_changed, + .use_for_apm = 1, +}; + +static void wm97xx_bat_work(struct work_struct *work) +{ + wm97xx_bat_update(&bat_ps); +} + +#ifdef CONFIG_PM +static int wm97xx_bat_suspend(struct platform_device *dev, pm_message_t state) +{ + flush_scheduled_work(); + return 0; +} + +static int wm97xx_bat_resume(struct platform_device *dev) +{ + schedule_work(&bat_work); + return 0; +} +#else +#define wm97xx_bat_suspend NULL +#define wm97xx_bat_resume NULL +#endif + +static int __devinit wm97xx_bat_probe(struct platform_device *dev) +{ + int ret = 0; + int props = 1; /* POWER_SUPPLY_PROP_PRESENT */ + int i = 0; + + if (dev->id != -1) + return -EINVAL; + + mutex_init(&work_lock); + + if (!pdata) { + dev_err(&dev->dev, "Please use wm97xx_bat_set_pdata\n"); + return -EINVAL; + } + + if (pdata->charge_gpio >= 0 && gpio_is_valid(pdata->charge_gpio)) { + ret = gpio_request(pdata->charge_gpio, "BATT CHRG"); + if (ret) + goto err; + ret = gpio_direction_input(pdata->charge_gpio); + if (ret) + goto err2; + props++; /* POWER_SUPPLY_PROP_STATUS */ + } + + if (pdata->batt_tech >= 0) + props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */ + if (pdata->temp_aux >= 0) + props++; /* POWER_SUPPLY_PROP_TEMP */ + if (pdata->batt_aux >= 0) + props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */ + if (pdata->max_voltage >= 0) + props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */ + if (pdata->min_voltage >= 0) + props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */ + + prop = kzalloc(props * sizeof(*prop), GFP_KERNEL); + if (!prop) + goto err2; + + prop[i++] = POWER_SUPPLY_PROP_PRESENT; + if (pdata->charge_gpio >= 0) + prop[i++] = POWER_SUPPLY_PROP_STATUS; + if (pdata->batt_tech >= 0) + prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY; + if (pdata->temp_aux >= 0) + prop[i++] = POWER_SUPPLY_PROP_TEMP; + if (pdata->batt_aux >= 0) + prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW; + if (pdata->max_voltage >= 0) + prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX; + if (pdata->min_voltage >= 0) + prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN; + + INIT_WORK(&bat_work, wm97xx_bat_work); + + if (!pdata->batt_name) { + dev_info(&dev->dev, "Please consider setting proper battery " + "name in platform definition file, falling " + "back to name \"wm97xx-batt\"\n"); + bat_ps.name = "wm97xx-batt"; + } else + bat_ps.name = pdata->batt_name; + + bat_ps.properties = prop; + bat_ps.num_properties = props; + + ret = power_supply_register(&dev->dev, &bat_ps); + if (!ret) + schedule_work(&bat_work); + else + goto err3; + + return 0; +err3: + kfree(prop); +err2: + gpio_free(pdata->charge_gpio); +err: + return ret; +} + +static int __devexit wm97xx_bat_remove(struct platform_device *dev) +{ + if (pdata && pdata->charge_gpio && pdata->charge_gpio >= 0) + gpio_free(pdata->charge_gpio); + flush_scheduled_work(); + power_supply_unregister(&bat_ps); + kfree(prop); + return 0; +} + +static struct platform_driver wm97xx_bat_driver = { + .driver = { + .name = "wm97xx-battery", + .owner = THIS_MODULE, + }, + .probe = wm97xx_bat_probe, + .remove = __devexit_p(wm97xx_bat_remove), + .suspend = wm97xx_bat_suspend, + .resume = wm97xx_bat_resume, +}; + +static int __init wm97xx_bat_init(void) +{ + return platform_driver_register(&wm97xx_bat_driver); +} + +static void __exit wm97xx_bat_exit(void) +{ + platform_driver_unregister(&wm97xx_bat_driver); +} + +void __init wm97xx_bat_set_pdata(struct wm97xx_batt_info *data) +{ + pdata = data; +} +EXPORT_SYMBOL_GPL(wm97xx_bat_set_pdata); + +module_init(wm97xx_bat_init); +module_exit(wm97xx_bat_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); +MODULE_DESCRIPTION("WM97xx battery driver"); |