diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-23 18:24:08 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-23 18:24:08 -0700 |
commit | 30d38542ec777468bb6a31829076a2dbc5690e35 (patch) | |
tree | 698b7a4fdd730befa34c4c9642cdbe72ce7d336a /drivers/power | |
parent | 20b7997e8abdf338dcc27fb4f1333c4973a7f113 (diff) | |
parent | 044e5f45e4ad890d03bd1e8bb44c634397cac24d (diff) | |
download | kernel_samsung_espresso10-30d38542ec777468bb6a31829076a2dbc5690e35.zip kernel_samsung_espresso10-30d38542ec777468bb6a31829076a2dbc5690e35.tar.gz kernel_samsung_espresso10-30d38542ec777468bb6a31829076a2dbc5690e35.tar.bz2 |
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (85 commits)
[ARM] pxa: add base support for PXA930 Handheld Platform (aka SAAR)
[ARM] pxa: add base support for PXA930 Evaluation Board (aka TavorEVB)
[ARM] pxa: add base support for PXA930 (aka Tavor-P)
[ARM] Update mach-types
[ARM] pxa: make littleton to use the new smc91x platform data
[ARM] pxa: make zylonite to use the new smc91x platform data
[ARM] pxa: make mainstone to use the new smc91x platform data
[ARM] pxa: make lubbock to use new smc91x platform data
[NET] smc91x: prepare SMC_USE_PXA_DMA to be specified in platform data
[NET] smc91x: prepare for SMC_IO_SHIFT to be a platform configurable variable
[NET] smc91x: add SMC91X_NOWAIT flag to platform data
[NET] smc91x: favor the use of SMC91X_USE_* instead of SMC_CAN_USE_*
[NET] smc91x: remove "irq_flags" from "struct smc91x_platdata"
[ARM] 5146/1: pxa2xx: convert all boards to call pxa2xx_transceiver_mode helper
Support for LCD on e740 e750 e400 and e800 e-series PDAs
E-series UDC support
PXA UDC - allow use of inverted GPIO for pullup
Add e350 support
Fix broken e-series build
E-series GPIO / IRQ definitions.
...
Diffstat (limited to 'drivers/power')
-rw-r--r-- | drivers/power/Kconfig | 6 | ||||
-rw-r--r-- | drivers/power/Makefile | 1 | ||||
-rw-r--r-- | drivers/power/palmtx_battery.c | 198 |
3 files changed, 205 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 58c806e..4d17d38 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -49,4 +49,10 @@ config BATTERY_OLPC help Say Y to enable support for the battery on the OLPC laptop. +config BATTERY_PALMTX + tristate "Palm T|X battery" + depends on MACH_PALMTX + help + Say Y to enable support for the battery in Palm T|X. + endif # POWER_SUPPLY diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 6413ded..6f43a54 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_APM_POWER) += apm_power.o obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o +obj-$(CONFIG_BATTERY_PALMTX) += palmtx_battery.o diff --git a/drivers/power/palmtx_battery.c b/drivers/power/palmtx_battery.c new file mode 100644 index 0000000..244bb27 --- /dev/null +++ b/drivers/power/palmtx_battery.c @@ -0,0 +1,198 @@ +/* + * 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 <asm/arch/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"); |