2008-09-11 12:37:32 -06:00
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/*
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* linux/drivers/power/wm97xx_battery.c
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*
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* Battery measurement code for WM97xx
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*
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* based on tosa_battery.c
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*
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* Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.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/wm97xx.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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2009-07-23 08:02:08 -06:00
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#include <linux/irq.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/slab.h>
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2008-09-11 12:37:32 -06:00
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static struct work_struct bat_work;
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2011-11-28 07:37:35 -07:00
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static DEFINE_MUTEX(work_lock);
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2008-09-11 12:37:32 -06:00
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static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
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static enum power_supply_property *prop;
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static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
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{
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2009-08-30 22:20:12 -06:00
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struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
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struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
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2009-06-23 07:50:06 -06:00
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return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
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2008-09-11 12:37:32 -06:00
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pdata->batt_aux) * pdata->batt_mult /
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pdata->batt_div;
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}
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static unsigned long wm97xx_read_temp(struct power_supply *bat_ps)
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{
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2009-08-30 22:20:12 -06:00
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struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
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struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
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2009-06-23 07:50:06 -06:00
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return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
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2008-09-11 12:37:32 -06:00
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pdata->temp_aux) * pdata->temp_mult /
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pdata->temp_div;
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}
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static int wm97xx_bat_get_property(struct power_supply *bat_ps,
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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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2009-08-30 22:20:12 -06:00
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struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
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struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
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2008-09-11 12:37:32 -06:00
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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val->intval = bat_status;
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break;
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case POWER_SUPPLY_PROP_TECHNOLOGY:
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val->intval = pdata->batt_tech;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (pdata->batt_aux >= 0)
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val->intval = wm97xx_read_bat(bat_ps);
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_TEMP:
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if (pdata->temp_aux >= 0)
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val->intval = wm97xx_read_temp(bat_ps);
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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if (pdata->max_voltage >= 0)
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val->intval = pdata->max_voltage;
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN:
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if (pdata->min_voltage >= 0)
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val->intval = pdata->min_voltage;
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = 1;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
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{
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schedule_work(&bat_work);
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}
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static void wm97xx_bat_update(struct power_supply *bat_ps)
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{
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int old_status = bat_status;
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2009-08-30 22:20:12 -06:00
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struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
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struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
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2008-09-11 12:37:32 -06:00
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mutex_lock(&work_lock);
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bat_status = (pdata->charge_gpio >= 0) ?
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(gpio_get_value(pdata->charge_gpio) ?
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POWER_SUPPLY_STATUS_DISCHARGING :
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POWER_SUPPLY_STATUS_CHARGING) :
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POWER_SUPPLY_STATUS_UNKNOWN;
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if (old_status != bat_status) {
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pr_debug("%s: %i -> %i\n", bat_ps->name, old_status,
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bat_status);
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power_supply_changed(bat_ps);
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}
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mutex_unlock(&work_lock);
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}
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static struct power_supply bat_ps = {
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.get_property = wm97xx_bat_get_property,
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.external_power_changed = wm97xx_bat_external_power_changed,
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.use_for_apm = 1,
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};
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static void wm97xx_bat_work(struct work_struct *work)
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{
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wm97xx_bat_update(&bat_ps);
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}
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2009-07-23 08:02:08 -06:00
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static irqreturn_t wm97xx_chrg_irq(int irq, void *data)
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{
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schedule_work(&bat_work);
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return IRQ_HANDLED;
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}
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2008-09-11 12:37:32 -06:00
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#ifdef CONFIG_PM
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2009-08-21 16:36:43 -06:00
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static int wm97xx_bat_suspend(struct device *dev)
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2008-09-11 12:37:32 -06:00
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{
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2012-08-20 15:51:24 -06:00
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flush_work(&bat_work);
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2008-09-11 12:37:32 -06:00
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return 0;
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}
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2009-08-21 16:36:43 -06:00
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static int wm97xx_bat_resume(struct device *dev)
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2008-09-11 12:37:32 -06:00
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{
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schedule_work(&bat_work);
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return 0;
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}
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2009-08-21 16:36:43 -06:00
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2009-12-14 19:00:08 -07:00
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static const struct dev_pm_ops wm97xx_bat_pm_ops = {
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2009-08-21 16:36:43 -06:00
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.suspend = wm97xx_bat_suspend,
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.resume = wm97xx_bat_resume,
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};
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2008-09-11 12:37:32 -06:00
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#endif
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2012-11-19 11:22:23 -07:00
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static int wm97xx_bat_probe(struct platform_device *dev)
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2008-09-11 12:37:32 -06:00
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{
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int ret = 0;
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int props = 1; /* POWER_SUPPLY_PROP_PRESENT */
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int i = 0;
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2009-08-30 22:20:12 -06:00
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struct wm97xx_pdata *wmdata = dev->dev.platform_data;
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struct wm97xx_batt_pdata *pdata;
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2010-01-27 13:43:21 -07:00
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if (!wmdata) {
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dev_err(&dev->dev, "No platform data supplied\n");
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return -EINVAL;
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}
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pdata = wmdata->batt_pdata;
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2008-09-11 12:37:32 -06:00
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if (dev->id != -1)
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return -EINVAL;
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if (!pdata) {
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2009-08-30 22:20:12 -06:00
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dev_err(&dev->dev, "No platform_data supplied\n");
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2008-09-11 12:37:32 -06:00
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return -EINVAL;
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}
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2009-07-23 08:02:08 -06:00
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if (gpio_is_valid(pdata->charge_gpio)) {
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2008-09-11 12:37:32 -06:00
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ret = gpio_request(pdata->charge_gpio, "BATT CHRG");
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if (ret)
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goto err;
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ret = gpio_direction_input(pdata->charge_gpio);
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2009-07-23 08:02:08 -06:00
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if (ret)
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goto err2;
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ret = request_irq(gpio_to_irq(pdata->charge_gpio),
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2011-09-22 02:59:11 -06:00
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wm97xx_chrg_irq, 0,
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2010-01-27 13:45:35 -07:00
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"AC Detect", dev);
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2008-09-11 12:37:32 -06:00
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if (ret)
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goto err2;
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props++; /* POWER_SUPPLY_PROP_STATUS */
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}
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if (pdata->batt_tech >= 0)
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props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */
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if (pdata->temp_aux >= 0)
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props++; /* POWER_SUPPLY_PROP_TEMP */
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if (pdata->batt_aux >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */
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if (pdata->max_voltage >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */
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if (pdata->min_voltage >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */
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prop = kzalloc(props * sizeof(*prop), GFP_KERNEL);
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2012-08-19 02:44:18 -06:00
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if (!prop) {
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ret = -ENOMEM;
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2009-07-23 08:02:08 -06:00
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goto err3;
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2012-08-19 02:44:18 -06:00
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}
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2008-09-11 12:37:32 -06:00
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prop[i++] = POWER_SUPPLY_PROP_PRESENT;
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if (pdata->charge_gpio >= 0)
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prop[i++] = POWER_SUPPLY_PROP_STATUS;
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if (pdata->batt_tech >= 0)
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prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
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if (pdata->temp_aux >= 0)
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prop[i++] = POWER_SUPPLY_PROP_TEMP;
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if (pdata->batt_aux >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW;
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if (pdata->max_voltage >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX;
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if (pdata->min_voltage >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN;
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INIT_WORK(&bat_work, wm97xx_bat_work);
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if (!pdata->batt_name) {
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dev_info(&dev->dev, "Please consider setting proper battery "
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"name in platform definition file, falling "
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"back to name \"wm97xx-batt\"\n");
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bat_ps.name = "wm97xx-batt";
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} else
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bat_ps.name = pdata->batt_name;
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bat_ps.properties = prop;
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bat_ps.num_properties = props;
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ret = power_supply_register(&dev->dev, &bat_ps);
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if (!ret)
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schedule_work(&bat_work);
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else
|
2009-07-23 08:02:08 -06:00
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goto err4;
|
2008-09-11 12:37:32 -06:00
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return 0;
|
2009-07-23 08:02:08 -06:00
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err4:
|
2008-09-11 12:37:32 -06:00
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kfree(prop);
|
2009-07-23 08:02:08 -06:00
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err3:
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if (gpio_is_valid(pdata->charge_gpio))
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free_irq(gpio_to_irq(pdata->charge_gpio), dev);
|
2008-09-11 12:37:32 -06:00
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err2:
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2009-07-23 08:02:08 -06:00
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if (gpio_is_valid(pdata->charge_gpio))
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gpio_free(pdata->charge_gpio);
|
2008-09-11 12:37:32 -06:00
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err:
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return ret;
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}
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|
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|
2012-11-19 11:26:07 -07:00
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static int wm97xx_bat_remove(struct platform_device *dev)
|
2008-09-11 12:37:32 -06:00
|
|
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{
|
2009-08-30 22:20:12 -06:00
|
|
|
struct wm97xx_pdata *wmdata = dev->dev.platform_data;
|
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struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
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|
2009-07-23 08:02:08 -06:00
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if (pdata && gpio_is_valid(pdata->charge_gpio)) {
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free_irq(gpio_to_irq(pdata->charge_gpio), dev);
|
2008-09-11 12:37:32 -06:00
|
|
|
gpio_free(pdata->charge_gpio);
|
2009-07-23 08:02:08 -06:00
|
|
|
}
|
2010-12-11 09:51:45 -07:00
|
|
|
cancel_work_sync(&bat_work);
|
2008-09-11 12:37:32 -06:00
|
|
|
power_supply_unregister(&bat_ps);
|
|
|
|
kfree(prop);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver wm97xx_bat_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "wm97xx-battery",
|
|
|
|
.owner = THIS_MODULE,
|
2009-08-21 16:36:43 -06:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
.pm = &wm97xx_bat_pm_ops,
|
|
|
|
#endif
|
2008-09-11 12:37:32 -06:00
|
|
|
},
|
|
|
|
.probe = wm97xx_bat_probe,
|
2012-11-19 11:20:40 -07:00
|
|
|
.remove = wm97xx_bat_remove,
|
2008-09-11 12:37:32 -06:00
|
|
|
};
|
|
|
|
|
2011-11-25 21:01:10 -07:00
|
|
|
module_platform_driver(wm97xx_bat_driver);
|
2008-09-11 12:37:32 -06:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
|
|
|
|
MODULE_DESCRIPTION("WM97xx battery driver");
|