Piteball/android_kernel_google_msm
1
0
Fork 0
mirror of https://github.com/followmsi/android_kernel_google_msm.git synced 2024-11-06 23:17:41 +00:00
Code Issues Projects Releases Wiki Activity

thermal: pm8xxx-tm: Use delayed_work task for temp alarm status reading

Browse source 
Use a delayed_work task to wait at least 40 ms in order for the
temp alarm status value to be updated after the TEMP_STAT IRQ
goes high.  Also remove IRQ enable and disable calls in the ISR
since the work item can only be enqueued once before it is run.

Change-Id: Ib5f13d0e82258b399749de96152c081d71981909
Signed-off-by: David Collins <collinsd@codeaurora.org>
(cherry picked from commit a42ed24bdc1a1ab8e2c0148430df063ee0679d18)
This commit is contained in:
David Collins 2012-09-12 14:58:54 -07:00 committed by Iliyan Malchev
parent 668fd2e679
commit bdda1c7404
1 changed files with 13 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
drivers/thermal/pm8xxx-tm.c
View file

@ -65,7 +65,7 @@
struct pm8xxx_tm_chip {
struct pm8xxx_tm_core_data cdata;
struct work_struct irq_work;
struct delayed_work irq_work;
struct device *dev;
struct thermal_zone_device *tz_dev;
unsigned long temp;
@ -83,6 +83,9 @@ enum pmic_thermal_override_mode {
SOFTWARE_OVERRIDE_ENABLED,
};
/* Delay between TEMP_STAT IRQ going high and status value changing in ms. */
#define STATUS_REGISTER_DELAY_MS 40
static inline int pm8xxx_tm_read_ctrl(struct pm8xxx_tm_chip *chip, u8 *reg)
{
int rc;
@ -422,8 +425,10 @@ static struct thermal_zone_device_ops pm8xxx_thermal_zone_ops_pm8058_adc = {
static void pm8xxx_tm_work(struct work_struct *work)
{
struct delayed_work *dwork
= container_of(work, struct delayed_work, work);
struct pm8xxx_tm_chip *chip
= container_of(work, struct pm8xxx_tm_chip, irq_work);
= container_of(dwork, struct pm8xxx_tm_chip, irq_work);
unsigned long temp = 0;
int rc, stage, thresh;
u8 reg;
@ -472,17 +477,15 @@ static void pm8xxx_tm_work(struct work_struct *work)
}
bail:
enable_irq(chip->tempstat_irq);
enable_irq(chip->overtemp_irq);
return;
}
static irqreturn_t pm8xxx_tm_isr(int irq, void *data)
{
struct pm8xxx_tm_chip *chip = data;
disable_irq_nosync(chip->tempstat_irq);
disable_irq_nosync(chip->overtemp_irq);
schedule_work(&chip->irq_work);
schedule_delayed_work(&chip->irq_work,
msecs_to_jiffies(STATUS_REGISTER_DELAY_MS) + 1);
return IRQ_HANDLED;
}
@ -621,7 +624,7 @@ static int __devinit pm8xxx_tm_probe(struct platform_device *pdev)
chip->mode = THERMAL_DEVICE_DISABLED;
thermal_zone_device_update(chip->tz_dev);
INIT_WORK(&chip->irq_work, pm8xxx_tm_work);
INIT_DELAYED_WORK(&chip->irq_work, pm8xxx_tm_work);
rc = request_irq(chip->tempstat_irq, pm8xxx_tm_isr, IRQF_TRIGGER_RISING,
chip->cdata.irq_name_temp_stat, chip);
@ -646,7 +649,7 @@ static int __devinit pm8xxx_tm_probe(struct platform_device *pdev)
err_free_irq_tempstat:
free_irq(chip->tempstat_irq, chip);
err_cancel_work:
cancel_work_sync(&chip->irq_work);
cancel_delayed_work_sync(&chip->irq_work);
err_free_tz:
thermal_zone_device_unregister(chip->tz_dev);
err_fail_adc:
@ -662,7 +665,7 @@ static int __devexit pm8xxx_tm_remove(struct platform_device *pdev)
if (chip) {
platform_set_drvdata(pdev, NULL);
cancel_work_sync(&chip->irq_work);
cancel_delayed_work_sync(&chip->irq_work);
free_irq(chip->overtemp_irq, chip);
free_irq(chip->tempstat_irq, chip);
pm8xxx_tm_shutdown_override(chip, SOFTWARE_OVERRIDE_DISABLED);