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extcon: max77693: Check the state/type of cable after boot completed

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This patch check the state/type of cable after completing the initialization
of platform and notify platform of cable state/type through extcon. If extcon
provider driver notify the state/type of cable before completing platform boot,
this uevent is unused and ignored.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Chanwoo Choi 2012-12-26 13:10:11 +09:00
parent 39bf369e4e
commit 297620fd1e
2 changed files with 36 additions and 3 deletions
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37
drivers/extcon/extcon-max77693.c
View File

@ -30,6 +30,7 @@
#include <linux/irqdomain.h>
#define DEV_NAME "max77693-muic"
#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
enum max77693_muic_adc_debounce_time {
ADC_DEBOUNCE_TIME_5MS = 0,
@ -52,6 +53,14 @@ struct max77693_muic_info {
struct work_struct irq_work;
struct mutex mutex;
/*
* Use delayed workqueue to detect cable state and then
* notify cable state to notifiee/platform through uevent.
* After completing the booting of platform, the extcon provider
* driver should notify cable state to upper layer.
*/
struct delayed_work wq_detcable;
/* Button of dock device */
struct input_dev *dock;
};
@ -912,13 +921,23 @@ static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
return ret;
}
static void max77693_muic_detect_cable_wq(struct work_struct *work)
{
struct max77693_muic_info *info = container_of(to_delayed_work(work),
struct max77693_muic_info, wq_detcable);
max77693_muic_detect_accessory(info);
}
static int max77693_muic_probe(struct platform_device *pdev)
{
struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
struct max77693_muic_platform_data *muic_pdata = pdata->muic_data;
struct max77693_muic_info *info;
int ret, i;
int delay_jiffies;
int ret;
int i;
u8 id;
info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
@ -1051,8 +1070,20 @@ static int max77693_muic_probe(struct platform_device *pdev)
/* Set ADC debounce time */
max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
/* Detect accessory on boot */
max77693_muic_detect_accessory(info);
/*
* Detect accessory after completing the initialization of platform
*
* - Use delayed workqueue to detect cable state and then
* notify cable state to notifiee/platform through uevent.
* After completing the booting of platform, the extcon provider
* driver should notify cable state to upper layer.
*/
INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
if (muic_pdata->detcable_delay_ms)
delay_jiffies = msecs_to_jiffies(muic_pdata->detcable_delay_ms);
else
delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
schedule_delayed_work(&info->wq_detcable, delay_jiffies);
return ret;

2
include/linux/mfd/max77693.h
View File

@ -38,6 +38,8 @@ struct max77693_reg_data {
struct max77693_muic_platform_data {
struct max77693_reg_data *init_data;
int num_init_data;
int detcable_delay_ms;
};
struct max77693_platform_data {