diff --git a/[refs] b/[refs] index 978881c5fa96..c6a87d5b82ac 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 685dc9a7dbfede28cc4a0fe4e65804194ec04fa5 +refs/heads/master: af5eb1a13273447c5708cd5425696f3b6f79dd9b diff --git a/trunk/drivers/extcon/extcon-max8997.c b/trunk/drivers/extcon/extcon-max8997.c index 349f65f6a4a4..e636d950ad6c 100644 --- a/trunk/drivers/extcon/extcon-max8997.c +++ b/trunk/drivers/extcon/extcon-max8997.c @@ -29,6 +29,7 @@ #include #define DEV_NAME "max8997-muic" +#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ enum max8997_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ @@ -128,6 +129,14 @@ struct max8997_muic_info { struct max8997_muic_platform_data *muic_pdata; enum max8997_muic_charger_type pre_charger_type; + /* + * 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; + /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register. @@ -629,11 +638,23 @@ static int max8997_muic_detect_dev(struct max8997_muic_info *info) return 0; } +static void max8997_muic_detect_cable_wq(struct work_struct *work) +{ + struct max8997_muic_info *info = container_of(to_delayed_work(work), + struct max8997_muic_info, wq_detcable); + int ret; + + ret = max8997_muic_detect_dev(info); + if (ret < 0) + pr_err("failed to detect cable type\n"); +} + static int max8997_muic_probe(struct platform_device *pdev) { struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); struct max8997_muic_info *info; + int delay_jiffies; int ret, i; info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), @@ -721,17 +742,23 @@ static int max8997_muic_probe(struct platform_device *pdev) /* Set ADC debounce time */ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); - /* Initial device detection */ - ret = max8997_muic_detect_dev(info); - if (ret < 0) { - dev_err(&pdev->dev, "failed to detect cable type\n"); - goto err_extcon; - } + /* + * 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, max8997_muic_detect_cable_wq); + if (pdata->muic_pdata->detcable_delay_ms) + delay_jiffies = msecs_to_jiffies(pdata->muic_pdata->detcable_delay_ms); + else + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + schedule_delayed_work(&info->wq_detcable, delay_jiffies); - return ret; + return 0; -err_extcon: - extcon_dev_unregister(info->edev); err_irq: while (--i >= 0) free_irq(muic_irqs[i].virq, info); diff --git a/trunk/include/linux/mfd/max8997.h b/trunk/include/linux/mfd/max8997.h index 2d2d67b6a393..cf815577bd68 100644 --- a/trunk/include/linux/mfd/max8997.h +++ b/trunk/include/linux/mfd/max8997.h @@ -93,6 +93,9 @@ struct max8997_muic_platform_data { struct max8997_muic_reg_data *init_data; int num_init_data; + /* Check cable state after certain delay */ + int detcable_delay_ms; + /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register.