From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/power/wm97xx_battery.c | 299 ++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 kernel/drivers/power/wm97xx_battery.c (limited to 'kernel/drivers/power/wm97xx_battery.c') diff --git a/kernel/drivers/power/wm97xx_battery.c b/kernel/drivers/power/wm97xx_battery.c new file mode 100644 index 000000000..c2f09ed35 --- /dev/null +++ b/kernel/drivers/power/wm97xx_battery.c @@ -0,0 +1,299 @@ +/* + * linux/drivers/power/wm97xx_battery.c + * + * Battery measurement code for WM97xx + * + * based on tosa_battery.c + * + * Copyright (C) 2008 Marek Vasut + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct work_struct bat_work; +static DEFINE_MUTEX(work_lock); +static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN; +static enum power_supply_property *prop; + +static unsigned long wm97xx_read_bat(struct power_supply *bat_ps) +{ + struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data; + struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata; + + return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent), + pdata->batt_aux) * pdata->batt_mult / + pdata->batt_div; +} + +static unsigned long wm97xx_read_temp(struct power_supply *bat_ps) +{ + struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data; + struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata; + + return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent), + 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) +{ + struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data; + struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata; + + 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; + struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data; + struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata; + + 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->desc->name, old_status, + bat_status); + power_supply_changed(bat_ps); + } + + mutex_unlock(&work_lock); +} + +static struct power_supply *bat_psy; +static struct power_supply_desc bat_psy_desc = { + .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_psy); +} + +static irqreturn_t wm97xx_chrg_irq(int irq, void *data) +{ + schedule_work(&bat_work); + return IRQ_HANDLED; +} + +#ifdef CONFIG_PM +static int wm97xx_bat_suspend(struct device *dev) +{ + flush_work(&bat_work); + return 0; +} + +static int wm97xx_bat_resume(struct device *dev) +{ + schedule_work(&bat_work); + return 0; +} + +static const struct dev_pm_ops wm97xx_bat_pm_ops = { + .suspend = wm97xx_bat_suspend, + .resume = wm97xx_bat_resume, +}; +#endif + +static int wm97xx_bat_probe(struct platform_device *dev) +{ + int ret = 0; + int props = 1; /* POWER_SUPPLY_PROP_PRESENT */ + int i = 0; + struct wm97xx_pdata *wmdata = dev->dev.platform_data; + struct wm97xx_batt_pdata *pdata; + + if (!wmdata) { + dev_err(&dev->dev, "No platform data supplied\n"); + return -EINVAL; + } + + pdata = wmdata->batt_pdata; + + if (dev->id != -1) + return -EINVAL; + + if (!pdata) { + dev_err(&dev->dev, "No platform_data supplied\n"); + return -EINVAL; + } + + if (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; + ret = request_irq(gpio_to_irq(pdata->charge_gpio), + wm97xx_chrg_irq, 0, + "AC Detect", dev); + 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) { + ret = -ENOMEM; + goto err3; + } + + 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_psy_desc.name = "wm97xx-batt"; + } else + bat_psy_desc.name = pdata->batt_name; + + bat_psy_desc.properties = prop; + bat_psy_desc.num_properties = props; + + bat_psy = power_supply_register(&dev->dev, &bat_psy_desc, NULL); + if (!IS_ERR(bat_psy)) { + schedule_work(&bat_work); + } else { + ret = PTR_ERR(bat_psy); + goto err4; + } + + return 0; +err4: + kfree(prop); +err3: + if (gpio_is_valid(pdata->charge_gpio)) + free_irq(gpio_to_irq(pdata->charge_gpio), dev); +err2: + if (gpio_is_valid(pdata->charge_gpio)) + gpio_free(pdata->charge_gpio); +err: + return ret; +} + +static int wm97xx_bat_remove(struct platform_device *dev) +{ + struct wm97xx_pdata *wmdata = dev->dev.platform_data; + struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata; + + if (pdata && gpio_is_valid(pdata->charge_gpio)) { + free_irq(gpio_to_irq(pdata->charge_gpio), dev); + gpio_free(pdata->charge_gpio); + } + cancel_work_sync(&bat_work); + power_supply_unregister(bat_psy); + kfree(prop); + return 0; +} + +static struct platform_driver wm97xx_bat_driver = { + .driver = { + .name = "wm97xx-battery", +#ifdef CONFIG_PM + .pm = &wm97xx_bat_pm_ops, +#endif + }, + .probe = wm97xx_bat_probe, + .remove = wm97xx_bat_remove, +}; + +module_platform_driver(wm97xx_bat_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marek Vasut "); +MODULE_DESCRIPTION("WM97xx battery driver"); -- cgit 1.2.3-korg