![Tejun Heo](/assets/img/avatar_default.png)
cancel_rearming_delayed_work[queue]() has been superceded by cancel_delayed_work_sync() quite some time ago. Convert all the in-kernel users. The conversions are completely equivalent and trivial. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: "David S. Miller" <davem@davemloft.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: netdev@vger.kernel.org Cc: Anton Vorontsov <cbou@mail.ru> Cc: David Woodhouse <dwmw2@infradead.org> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Alex Elder <aelder@sgi.com> Cc: xfs-masters@oss.sgi.com Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: netfilter-devel@vger.kernel.org Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: linux-nfs@vger.kernel.org
654 lines
18 KiB
C
654 lines
18 KiB
C
/*
|
|
* Driver for batteries with DS2760 chips inside.
|
|
*
|
|
* Copyright © 2007 Anton Vorontsov
|
|
* 2004-2007 Matt Reimer
|
|
* 2004 Szabolcs Gyurko
|
|
*
|
|
* Use consistent with the GNU GPL is permitted,
|
|
* provided that this copyright notice is
|
|
* preserved in its entirety in all copies and derived works.
|
|
*
|
|
* Author: Anton Vorontsov <cbou@mail.ru>
|
|
* February 2007
|
|
*
|
|
* Matt Reimer <mreimer@vpop.net>
|
|
* April 2004, 2005, 2007
|
|
*
|
|
* Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
|
|
* September 2004
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/param.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/power_supply.h>
|
|
|
|
#include "../w1/w1.h"
|
|
#include "../w1/slaves/w1_ds2760.h"
|
|
|
|
struct ds2760_device_info {
|
|
struct device *dev;
|
|
|
|
/* DS2760 data, valid after calling ds2760_battery_read_status() */
|
|
unsigned long update_time; /* jiffies when data read */
|
|
char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */
|
|
int voltage_raw; /* units of 4.88 mV */
|
|
int voltage_uV; /* units of µV */
|
|
int current_raw; /* units of 0.625 mA */
|
|
int current_uA; /* units of µA */
|
|
int accum_current_raw; /* units of 0.25 mAh */
|
|
int accum_current_uAh; /* units of µAh */
|
|
int temp_raw; /* units of 0.125 °C */
|
|
int temp_C; /* units of 0.1 °C */
|
|
int rated_capacity; /* units of µAh */
|
|
int rem_capacity; /* percentage */
|
|
int full_active_uAh; /* units of µAh */
|
|
int empty_uAh; /* units of µAh */
|
|
int life_sec; /* units of seconds */
|
|
int charge_status; /* POWER_SUPPLY_STATUS_* */
|
|
|
|
int full_counter;
|
|
struct power_supply bat;
|
|
struct device *w1_dev;
|
|
struct workqueue_struct *monitor_wqueue;
|
|
struct delayed_work monitor_work;
|
|
struct delayed_work set_charged_work;
|
|
};
|
|
|
|
static unsigned int cache_time = 1000;
|
|
module_param(cache_time, uint, 0644);
|
|
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
|
|
|
|
static unsigned int pmod_enabled;
|
|
module_param(pmod_enabled, bool, 0644);
|
|
MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
|
|
|
|
static unsigned int rated_capacity;
|
|
module_param(rated_capacity, uint, 0644);
|
|
MODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index");
|
|
|
|
static unsigned int current_accum;
|
|
module_param(current_accum, uint, 0644);
|
|
MODULE_PARM_DESC(current_accum, "current accumulator value");
|
|
|
|
/* Some batteries have their rated capacity stored a N * 10 mAh, while
|
|
* others use an index into this table. */
|
|
static int rated_capacities[] = {
|
|
0,
|
|
920, /* Samsung */
|
|
920, /* BYD */
|
|
920, /* Lishen */
|
|
920, /* NEC */
|
|
1440, /* Samsung */
|
|
1440, /* BYD */
|
|
1440, /* Lishen */
|
|
1440, /* NEC */
|
|
2880, /* Samsung */
|
|
2880, /* BYD */
|
|
2880, /* Lishen */
|
|
2880 /* NEC */
|
|
};
|
|
|
|
/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C
|
|
* temp is in Celsius */
|
|
static int battery_interpolate(int array[], int temp)
|
|
{
|
|
int index, dt;
|
|
|
|
if (temp <= 0)
|
|
return array[0];
|
|
if (temp >= 40)
|
|
return array[4];
|
|
|
|
index = temp / 10;
|
|
dt = temp % 10;
|
|
|
|
return array[index] + (((array[index + 1] - array[index]) * dt) / 10);
|
|
}
|
|
|
|
static int ds2760_battery_read_status(struct ds2760_device_info *di)
|
|
{
|
|
int ret, i, start, count, scale[5];
|
|
|
|
if (di->update_time && time_before(jiffies, di->update_time +
|
|
msecs_to_jiffies(cache_time)))
|
|
return 0;
|
|
|
|
/* The first time we read the entire contents of SRAM/EEPROM,
|
|
* but after that we just read the interesting bits that change. */
|
|
if (di->update_time == 0) {
|
|
start = 0;
|
|
count = DS2760_DATA_SIZE;
|
|
} else {
|
|
start = DS2760_VOLTAGE_MSB;
|
|
count = DS2760_TEMP_LSB - start + 1;
|
|
}
|
|
|
|
ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count);
|
|
if (ret != count) {
|
|
dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n",
|
|
di->w1_dev);
|
|
return 1;
|
|
}
|
|
|
|
di->update_time = jiffies;
|
|
|
|
/* DS2760 reports voltage in units of 4.88mV, but the battery class
|
|
* reports in units of uV, so convert by multiplying by 4880. */
|
|
di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) |
|
|
(di->raw[DS2760_VOLTAGE_LSB] >> 5);
|
|
di->voltage_uV = di->voltage_raw * 4880;
|
|
|
|
/* DS2760 reports current in signed units of 0.625mA, but the battery
|
|
* class reports in units of µA, so convert by multiplying by 625. */
|
|
di->current_raw =
|
|
(((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) |
|
|
(di->raw[DS2760_CURRENT_LSB] >> 3);
|
|
di->current_uA = di->current_raw * 625;
|
|
|
|
/* DS2760 reports accumulated current in signed units of 0.25mAh. */
|
|
di->accum_current_raw =
|
|
(((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) |
|
|
di->raw[DS2760_CURRENT_ACCUM_LSB];
|
|
di->accum_current_uAh = di->accum_current_raw * 250;
|
|
|
|
/* DS2760 reports temperature in signed units of 0.125°C, but the
|
|
* battery class reports in units of 1/10 °C, so we convert by
|
|
* multiplying by .125 * 10 = 1.25. */
|
|
di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) |
|
|
(di->raw[DS2760_TEMP_LSB] >> 5);
|
|
di->temp_C = di->temp_raw + (di->temp_raw / 4);
|
|
|
|
/* At least some battery monitors (e.g. HP iPAQ) store the battery's
|
|
* maximum rated capacity. */
|
|
if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities))
|
|
di->rated_capacity = rated_capacities[
|
|
(unsigned int)di->raw[DS2760_RATED_CAPACITY]];
|
|
else
|
|
di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10;
|
|
|
|
di->rated_capacity *= 1000; /* convert to µAh */
|
|
|
|
/* Calculate the full level at the present temperature. */
|
|
di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 |
|
|
di->raw[DS2760_ACTIVE_FULL + 1];
|
|
|
|
/* If the full_active_uAh value is not given, fall back to the rated
|
|
* capacity. This is likely to happen when chips are not part of the
|
|
* battery pack and is therefore not bootstrapped. */
|
|
if (di->full_active_uAh == 0)
|
|
di->full_active_uAh = di->rated_capacity / 1000L;
|
|
|
|
scale[0] = di->full_active_uAh;
|
|
for (i = 1; i < 5; i++)
|
|
scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i];
|
|
|
|
di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10);
|
|
di->full_active_uAh *= 1000; /* convert to µAh */
|
|
|
|
/* Calculate the empty level at the present temperature. */
|
|
scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4];
|
|
for (i = 3; i >= 0; i--)
|
|
scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i];
|
|
|
|
di->empty_uAh = battery_interpolate(scale, di->temp_C / 10);
|
|
di->empty_uAh *= 1000; /* convert to µAh */
|
|
|
|
if (di->full_active_uAh == di->empty_uAh)
|
|
di->rem_capacity = 0;
|
|
else
|
|
/* From Maxim Application Note 131: remaining capacity =
|
|
* ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */
|
|
di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) /
|
|
(di->full_active_uAh - di->empty_uAh);
|
|
|
|
if (di->rem_capacity < 0)
|
|
di->rem_capacity = 0;
|
|
if (di->rem_capacity > 100)
|
|
di->rem_capacity = 100;
|
|
|
|
if (di->current_uA >= 100L)
|
|
di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L)
|
|
/ (di->current_uA / 100L);
|
|
else
|
|
di->life_sec = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ds2760_battery_set_current_accum(struct ds2760_device_info *di,
|
|
unsigned int acr_val)
|
|
{
|
|
unsigned char acr[2];
|
|
|
|
/* acr is in units of 0.25 mAh */
|
|
acr_val *= 4L;
|
|
acr_val /= 1000;
|
|
|
|
acr[0] = acr_val >> 8;
|
|
acr[1] = acr_val & 0xff;
|
|
|
|
if (w1_ds2760_write(di->w1_dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2)
|
|
dev_warn(di->dev, "ACR write failed\n");
|
|
}
|
|
|
|
static void ds2760_battery_update_status(struct ds2760_device_info *di)
|
|
{
|
|
int old_charge_status = di->charge_status;
|
|
|
|
ds2760_battery_read_status(di);
|
|
|
|
if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN)
|
|
di->full_counter = 0;
|
|
|
|
if (power_supply_am_i_supplied(&di->bat)) {
|
|
if (di->current_uA > 10000) {
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
di->full_counter = 0;
|
|
} else if (di->current_uA < -5000) {
|
|
if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING)
|
|
dev_notice(di->dev, "not enough power to "
|
|
"charge\n");
|
|
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
di->full_counter = 0;
|
|
} else if (di->current_uA < 10000 &&
|
|
di->charge_status != POWER_SUPPLY_STATUS_FULL) {
|
|
|
|
/* Don't consider the battery to be full unless
|
|
* we've seen the current < 10 mA at least two
|
|
* consecutive times. */
|
|
|
|
di->full_counter++;
|
|
|
|
if (di->full_counter < 2) {
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
} else {
|
|
di->charge_status = POWER_SUPPLY_STATUS_FULL;
|
|
ds2760_battery_set_current_accum(di,
|
|
di->full_active_uAh);
|
|
}
|
|
}
|
|
} else {
|
|
di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
di->full_counter = 0;
|
|
}
|
|
|
|
if (di->charge_status != old_charge_status)
|
|
power_supply_changed(&di->bat);
|
|
}
|
|
|
|
static void ds2760_battery_write_status(struct ds2760_device_info *di,
|
|
char status)
|
|
{
|
|
if (status == di->raw[DS2760_STATUS_REG])
|
|
return;
|
|
|
|
w1_ds2760_write(di->w1_dev, &status, DS2760_STATUS_WRITE_REG, 1);
|
|
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
}
|
|
|
|
static void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di,
|
|
unsigned char rated_capacity)
|
|
{
|
|
if (rated_capacity == di->raw[DS2760_RATED_CAPACITY])
|
|
return;
|
|
|
|
w1_ds2760_write(di->w1_dev, &rated_capacity, DS2760_RATED_CAPACITY, 1);
|
|
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
}
|
|
|
|
static void ds2760_battery_write_active_full(struct ds2760_device_info *di,
|
|
int active_full)
|
|
{
|
|
unsigned char tmp[2] = {
|
|
active_full >> 8,
|
|
active_full & 0xff
|
|
};
|
|
|
|
if (tmp[0] == di->raw[DS2760_ACTIVE_FULL] &&
|
|
tmp[1] == di->raw[DS2760_ACTIVE_FULL + 1])
|
|
return;
|
|
|
|
w1_ds2760_write(di->w1_dev, tmp, DS2760_ACTIVE_FULL, sizeof(tmp));
|
|
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0);
|
|
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0);
|
|
|
|
/* Write to the di->raw[] buffer directly - the DS2760_ACTIVE_FULL
|
|
* values won't be read back by ds2760_battery_read_status() */
|
|
di->raw[DS2760_ACTIVE_FULL] = tmp[0];
|
|
di->raw[DS2760_ACTIVE_FULL + 1] = tmp[1];
|
|
}
|
|
|
|
static void ds2760_battery_work(struct work_struct *work)
|
|
{
|
|
struct ds2760_device_info *di = container_of(work,
|
|
struct ds2760_device_info, monitor_work.work);
|
|
const int interval = HZ * 60;
|
|
|
|
dev_dbg(di->dev, "%s\n", __func__);
|
|
|
|
ds2760_battery_update_status(di);
|
|
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval);
|
|
}
|
|
|
|
#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \
|
|
bat);
|
|
|
|
static void ds2760_battery_external_power_changed(struct power_supply *psy)
|
|
{
|
|
struct ds2760_device_info *di = to_ds2760_device_info(psy);
|
|
|
|
dev_dbg(di->dev, "%s\n", __func__);
|
|
|
|
cancel_delayed_work(&di->monitor_work);
|
|
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
|
|
}
|
|
|
|
|
|
static void ds2760_battery_set_charged_work(struct work_struct *work)
|
|
{
|
|
char bias;
|
|
struct ds2760_device_info *di = container_of(work,
|
|
struct ds2760_device_info, set_charged_work.work);
|
|
|
|
dev_dbg(di->dev, "%s\n", __func__);
|
|
|
|
ds2760_battery_read_status(di);
|
|
|
|
/* When we get notified by external circuitry that the battery is
|
|
* considered fully charged now, we know that there is no current
|
|
* flow any more. However, the ds2760's internal current meter is
|
|
* too inaccurate to rely on - spec say something ~15% failure.
|
|
* Hence, we use the current offset bias register to compensate
|
|
* that error.
|
|
*/
|
|
|
|
if (!power_supply_am_i_supplied(&di->bat))
|
|
return;
|
|
|
|
bias = (signed char) di->current_raw +
|
|
(signed char) di->raw[DS2760_CURRENT_OFFSET_BIAS];
|
|
|
|
dev_dbg(di->dev, "%s: bias = %d\n", __func__, bias);
|
|
|
|
w1_ds2760_write(di->w1_dev, &bias, DS2760_CURRENT_OFFSET_BIAS, 1);
|
|
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
|
|
|
|
/* Write to the di->raw[] buffer directly - the CURRENT_OFFSET_BIAS
|
|
* value won't be read back by ds2760_battery_read_status() */
|
|
di->raw[DS2760_CURRENT_OFFSET_BIAS] = bias;
|
|
}
|
|
|
|
static void ds2760_battery_set_charged(struct power_supply *psy)
|
|
{
|
|
struct ds2760_device_info *di = to_ds2760_device_info(psy);
|
|
|
|
/* postpone the actual work by 20 secs. This is for debouncing GPIO
|
|
* signals and to let the current value settle. See AN4188. */
|
|
cancel_delayed_work(&di->set_charged_work);
|
|
queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
|
|
}
|
|
|
|
static int ds2760_battery_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct ds2760_device_info *di = to_ds2760_device_info(psy);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
val->intval = di->charge_status;
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ds2760_battery_read_status(di);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
val->intval = di->voltage_uV;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
val->intval = di->current_uA;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
|
val->intval = di->rated_capacity;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
val->intval = di->full_active_uAh;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
|
|
val->intval = di->empty_uAh;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
val->intval = di->accum_current_uAh;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
val->intval = di->temp_C;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
|
|
val->intval = di->life_sec;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
val->intval = di->rem_capacity;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds2760_battery_set_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct ds2760_device_info *di = to_ds2760_device_info(psy);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
/* the interface counts in uAh, convert the value */
|
|
ds2760_battery_write_active_full(di, val->intval / 1000L);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
/* ds2760_battery_set_current_accum() does the conversion */
|
|
ds2760_battery_set_current_accum(di, val->intval);
|
|
break;
|
|
|
|
default:
|
|
return -EPERM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds2760_battery_property_is_writeable(struct power_supply *psy,
|
|
enum power_supply_property psp)
|
|
{
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
return 1;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property ds2760_battery_props[] = {
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
|
POWER_SUPPLY_PROP_CHARGE_EMPTY,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
POWER_SUPPLY_PROP_TEMP,
|
|
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
|
|
POWER_SUPPLY_PROP_CAPACITY,
|
|
};
|
|
|
|
static int ds2760_battery_probe(struct platform_device *pdev)
|
|
{
|
|
char status;
|
|
int retval = 0;
|
|
struct ds2760_device_info *di;
|
|
|
|
di = kzalloc(sizeof(*di), GFP_KERNEL);
|
|
if (!di) {
|
|
retval = -ENOMEM;
|
|
goto di_alloc_failed;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, di);
|
|
|
|
di->dev = &pdev->dev;
|
|
di->w1_dev = pdev->dev.parent;
|
|
di->bat.name = dev_name(&pdev->dev);
|
|
di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
di->bat.properties = ds2760_battery_props;
|
|
di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
|
|
di->bat.get_property = ds2760_battery_get_property;
|
|
di->bat.set_property = ds2760_battery_set_property;
|
|
di->bat.property_is_writeable =
|
|
ds2760_battery_property_is_writeable;
|
|
di->bat.set_charged = ds2760_battery_set_charged;
|
|
di->bat.external_power_changed =
|
|
ds2760_battery_external_power_changed;
|
|
|
|
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
|
|
/* enable sleep mode feature */
|
|
ds2760_battery_read_status(di);
|
|
status = di->raw[DS2760_STATUS_REG];
|
|
if (pmod_enabled)
|
|
status |= DS2760_STATUS_PMOD;
|
|
else
|
|
status &= ~DS2760_STATUS_PMOD;
|
|
|
|
ds2760_battery_write_status(di, status);
|
|
|
|
/* set rated capacity from module param */
|
|
if (rated_capacity)
|
|
ds2760_battery_write_rated_capacity(di, rated_capacity);
|
|
|
|
/* set current accumulator if given as parameter.
|
|
* this should only be done for bootstrapping the value */
|
|
if (current_accum)
|
|
ds2760_battery_set_current_accum(di, current_accum);
|
|
|
|
retval = power_supply_register(&pdev->dev, &di->bat);
|
|
if (retval) {
|
|
dev_err(di->dev, "failed to register battery\n");
|
|
goto batt_failed;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
|
|
INIT_DELAYED_WORK(&di->set_charged_work,
|
|
ds2760_battery_set_charged_work);
|
|
di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
|
|
if (!di->monitor_wqueue) {
|
|
retval = -ESRCH;
|
|
goto workqueue_failed;
|
|
}
|
|
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1);
|
|
|
|
goto success;
|
|
|
|
workqueue_failed:
|
|
power_supply_unregister(&di->bat);
|
|
batt_failed:
|
|
kfree(di);
|
|
di_alloc_failed:
|
|
success:
|
|
return retval;
|
|
}
|
|
|
|
static int ds2760_battery_remove(struct platform_device *pdev)
|
|
{
|
|
struct ds2760_device_info *di = platform_get_drvdata(pdev);
|
|
|
|
cancel_delayed_work_sync(&di->monitor_work);
|
|
cancel_delayed_work_sync(&di->set_charged_work);
|
|
destroy_workqueue(di->monitor_wqueue);
|
|
power_supply_unregister(&di->bat);
|
|
kfree(di);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int ds2760_battery_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct ds2760_device_info *di = platform_get_drvdata(pdev);
|
|
|
|
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds2760_battery_resume(struct platform_device *pdev)
|
|
{
|
|
struct ds2760_device_info *di = platform_get_drvdata(pdev);
|
|
|
|
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
power_supply_changed(&di->bat);
|
|
|
|
cancel_delayed_work(&di->monitor_work);
|
|
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define ds2760_battery_suspend NULL
|
|
#define ds2760_battery_resume NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
MODULE_ALIAS("platform:ds2760-battery");
|
|
|
|
static struct platform_driver ds2760_battery_driver = {
|
|
.driver = {
|
|
.name = "ds2760-battery",
|
|
},
|
|
.probe = ds2760_battery_probe,
|
|
.remove = ds2760_battery_remove,
|
|
.suspend = ds2760_battery_suspend,
|
|
.resume = ds2760_battery_resume,
|
|
};
|
|
|
|
static int __init ds2760_battery_init(void)
|
|
{
|
|
return platform_driver_register(&ds2760_battery_driver);
|
|
}
|
|
|
|
static void __exit ds2760_battery_exit(void)
|
|
{
|
|
platform_driver_unregister(&ds2760_battery_driver);
|
|
}
|
|
|
|
module_init(ds2760_battery_init);
|
|
module_exit(ds2760_battery_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
|
|
"Matt Reimer <mreimer@vpop.net>, "
|
|
"Anton Vorontsov <cbou@mail.ru>");
|
|
MODULE_DESCRIPTION("ds2760 battery driver");
|