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yaml
---
r: 367477
b: refs/heads/master
c: 257107a
h: refs/heads/master
i:
  367475: 40323dc
v: v3
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Lee Jones committed Mar 7, 2013
1 parent 2afef33 commit d3fde24
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Showing 2 changed files with 53 additions and 40 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: eaded808c9f9f36d95b5b7fe195ab1839e9e486c
refs/heads/master: 257107ae6b9ba1f3822a8b079acef57a752dcc4c
91 changes: 52 additions & 39 deletions trunk/drivers/power/abx500_chargalg.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
/*
* Copyright (C) ST-Ericsson SA 2012
* Copyright (c) 2012 Sony Mobile Communications AB
*
* Charging algorithm driver for abx500 variants
*
Expand All @@ -8,11 +9,13 @@
* Johan Palsson <johan.palsson@stericsson.com>
* Karl Komierowski <karl.komierowski@stericsson.com>
* Arun R Murthy <arun.murthy@stericsson.com>
* Author: Imre Sunyi <imre.sunyi@sonymobile.com>
*/

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
Expand All @@ -24,6 +27,7 @@
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/notifier.h>
Expand All @@ -34,6 +38,12 @@
/* End-of-charge criteria counter */
#define EOC_COND_CNT 10

/* One hour expressed in seconds */
#define ONE_HOUR_IN_SECONDS 3600

/* Five minutes expressed in seconds */
#define FIVE_MINUTES_IN_SECONDS 300

/* Plus margin for the low battery threshold */
#define BAT_PLUS_MARGIN (100)

Expand Down Expand Up @@ -244,8 +254,8 @@ struct abx500_chargalg {
struct delayed_work chargalg_periodic_work;
struct delayed_work chargalg_wd_work;
struct work_struct chargalg_work;
struct timer_list safety_timer;
struct timer_list maintenance_timer;
struct hrtimer safety_timer;
struct hrtimer maintenance_timer;
struct kobject chargalg_kobject;
};

Expand All @@ -260,38 +270,47 @@ static enum power_supply_property abx500_chargalg_props[] = {

/**
* abx500_chargalg_safety_timer_expired() - Expiration of the safety timer
* @data: pointer to the abx500_chargalg structure
* @timer: pointer to the hrtimer structure
*
* This function gets called when the safety timer for the charger
* expires
*/
static void abx500_chargalg_safety_timer_expired(unsigned long data)
static enum hrtimer_restart
abx500_chargalg_safety_timer_expired(struct hrtimer *timer)
{
struct abx500_chargalg *di = (struct abx500_chargalg *) data;
struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg,
safety_timer);
dev_err(di->dev, "Safety timer expired\n");
di->events.safety_timer_expired = true;

/* Trigger execution of the algorithm instantly */
queue_work(di->chargalg_wq, &di->chargalg_work);

return HRTIMER_NORESTART;
}

/**
* abx500_chargalg_maintenance_timer_expired() - Expiration of
* the maintenance timer
* @i: pointer to the abx500_chargalg structure
* @timer: pointer to the timer structure
*
* This function gets called when the maintenence timer
* expires
*/
static void abx500_chargalg_maintenance_timer_expired(unsigned long data)
static enum hrtimer_restart
abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer)
{

struct abx500_chargalg *di = (struct abx500_chargalg *) data;
struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg,
maintenance_timer);

dev_dbg(di->dev, "Maintenance timer expired\n");
di->events.maintenance_timer_expired = true;

/* Trigger execution of the algorithm instantly */
queue_work(di->chargalg_wq, &di->chargalg_work);

return HRTIMER_NORESTART;
}

/**
Expand Down Expand Up @@ -391,19 +410,16 @@ static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di)
*/
static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di)
{
unsigned long timer_expiration = 0;
/* Charger-dependent expiration time in hours*/
int timer_expiration = 0;

switch (di->chg_info.charger_type) {
case AC_CHG:
timer_expiration =
round_jiffies(jiffies +
(di->bm->main_safety_tmr_h * 3600 * HZ));
timer_expiration = di->bm->main_safety_tmr_h;
break;

case USB_CHG:
timer_expiration =
round_jiffies(jiffies +
(di->bm->usb_safety_tmr_h * 3600 * HZ));
timer_expiration = di->bm->usb_safety_tmr_h;
break;

default:
Expand All @@ -412,11 +428,10 @@ static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di)
}

di->events.safety_timer_expired = false;
di->safety_timer.expires = timer_expiration;
if (!timer_pending(&di->safety_timer))
add_timer(&di->safety_timer);
else
mod_timer(&di->safety_timer, timer_expiration);
hrtimer_set_expires_range(&di->safety_timer,
ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0),
ktime_set(FIVE_MINUTES_IN_SECONDS, 0));
hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL);
}

/**
Expand All @@ -427,8 +442,8 @@ static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di)
*/
static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di)
{
di->events.safety_timer_expired = false;
del_timer(&di->safety_timer);
if (hrtimer_try_to_cancel(&di->safety_timer) >= 0)
di->events.safety_timer_expired = false;
}

/**
Expand All @@ -443,17 +458,11 @@ static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di)
static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di,
int duration)
{
unsigned long timer_expiration;

/* Convert from hours to jiffies */
timer_expiration = round_jiffies(jiffies + (duration * 3600 * HZ));

hrtimer_set_expires_range(&di->maintenance_timer,
ktime_set(duration * ONE_HOUR_IN_SECONDS, 0),
ktime_set(FIVE_MINUTES_IN_SECONDS, 0));
di->events.maintenance_timer_expired = false;
di->maintenance_timer.expires = timer_expiration;
if (!timer_pending(&di->maintenance_timer))
add_timer(&di->maintenance_timer);
else
mod_timer(&di->maintenance_timer, timer_expiration);
hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL);
}

/**
Expand All @@ -465,8 +474,8 @@ static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di,
*/
static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di)
{
di->events.maintenance_timer_expired = false;
del_timer(&di->maintenance_timer);
if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0)
di->events.maintenance_timer_expired = false;
}

/**
Expand Down Expand Up @@ -1937,10 +1946,16 @@ static int abx500_chargalg_remove(struct platform_device *pdev)
/* sysfs interface to enable/disbale charging from user space */
abx500_chargalg_sysfs_exit(di);

hrtimer_cancel(&di->safety_timer);
hrtimer_cancel(&di->maintenance_timer);

cancel_delayed_work_sync(&di->chargalg_periodic_work);
cancel_delayed_work_sync(&di->chargalg_wd_work);
cancel_work_sync(&di->chargalg_work);

/* Delete the work queue */
destroy_workqueue(di->chargalg_wq);

flush_scheduled_work();
power_supply_unregister(&di->chargalg_psy);
platform_set_drvdata(pdev, NULL);

Expand Down Expand Up @@ -1994,15 +2009,13 @@ static int abx500_chargalg_probe(struct platform_device *pdev)
abx500_chargalg_external_power_changed;

/* Initilialize safety timer */
init_timer(&di->safety_timer);
hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
di->safety_timer.function = abx500_chargalg_safety_timer_expired;
di->safety_timer.data = (unsigned long) di;

/* Initilialize maintenance timer */
init_timer(&di->maintenance_timer);
hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
di->maintenance_timer.function =
abx500_chargalg_maintenance_timer_expired;
di->maintenance_timer.data = (unsigned long) di;

/* Create a work queue for the chargalg */
di->chargalg_wq =
Expand Down

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