diff options
| author | Chanwoo Choi <cw00.choi@samsung.com> | 2012-12-26 08:10:11 +0400 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2013-01-15 10:42:15 +0400 |
| commit | 297620fd1e14edf5fefa1736f873b9228336eee1 (patch) | |
| tree | 2aaed8a7ce207853299a16cce680196e3e03e043 | |
| parent | 39bf369e4ed321158eb8dc5031b4a9f2108ea614 (diff) | |
| download | linux-297620fd1e14edf5fefa1736f873b9228336eee1.tar.xz | |
extcon: max77693: Check the state/type of cable after boot completed
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>
| -rw-r--r-- | drivers/extcon/extcon-max77693.c | 37 | ||||
| -rw-r--r-- | include/linux/mfd/max77693.h | 2 |
2 files changed, 36 insertions, 3 deletions
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c index 07ea96bfd0cb..10f41f3d5be4 100644 --- a/drivers/extcon/extcon-max77693.c +++ b/drivers/extcon/extcon-max77693.c @@ -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; diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h index fe03b2d35d4f..9aa9c203f28b 100644 --- a/include/linux/mfd/max77693.h +++ b/include/linux/mfd/max77693.h @@ -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 { |