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Subject[PATCH 03/57] power: ab8500_btemp: Detect battery type in workqueue
Date
From: Jonas Aaberg <jonas.aberg@stericsson.com>

Detect battery type in work queue instead of probe.
This reduces the system boot time with 1.5s

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Karl KOMIEROWSKI <karl.komierowski@stericsson.com>
---
drivers/power/ab8500_btemp.c | 15 +++++++++++----
1 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c
index bba3cca..94a3ee8 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -83,6 +83,7 @@ struct ab8500_btemp_ranges {
* @btemp_ranges: Battery temperature range structure
* @btemp_wq: Work queue for measuring the temperature periodically
* @btemp_periodic_work: Work for measuring the temperature periodically
+ * @initialized: True if battery id read.
*/
struct ab8500_btemp {
struct device *dev;
@@ -100,6 +101,7 @@ struct ab8500_btemp {
struct ab8500_btemp_ranges btemp_ranges;
struct workqueue_struct *btemp_wq;
struct delayed_work btemp_periodic_work;
+ bool initialized;
};

/* BTEMP power supply properties */
@@ -569,6 +571,13 @@ static void ab8500_btemp_periodic_work(struct work_struct *work)
struct ab8500_btemp *di = container_of(work,
struct ab8500_btemp, btemp_periodic_work.work);

+ if (!di->initialized) {
+ di->initialized = true;
+ /* Identify the battery */
+ if (ab8500_btemp_id(di) < 0)
+ dev_warn(di->dev, "failed to identify the battery\n");
+ }
+
di->bat_temp = ab8500_btemp_measure_temp(di);

if (di->bat_temp != di->prev_bat_temp) {
@@ -981,6 +990,8 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev)
di->parent = dev_get_drvdata(pdev->dev.parent);
di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");

+ di->initialized = false;
+
/* get btemp specific platform data */
di->pdata = plat_data->btemp;
if (!di->pdata) {
@@ -1021,10 +1032,6 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev)
INIT_DELAYED_WORK_DEFERRABLE(&di->btemp_periodic_work,
ab8500_btemp_periodic_work);

- /* Identify the battery */
- if (ab8500_btemp_id(di) < 0)
- dev_warn(di->dev, "failed to identify the battery\n");
-
/* Set BTEMP thermal limits. Low and Med are fixed */
di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT;
di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT;
--
1.7.5.4


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