diff options
Diffstat (limited to 'drivers/power/supply/axp20x_usb_power.c')
| -rw-r--r-- | drivers/power/supply/axp20x_usb_power.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c index 1732304bc96e..4fde24b5f35a 100644 --- a/drivers/power/supply/axp20x_usb_power.c +++ b/drivers/power/supply/axp20x_usb_power.c @@ -68,16 +68,32 @@ struct axp20x_usb_power { struct iio_channel *vbus_i; struct delayed_work vbus_detect; unsigned int old_status; + unsigned int online; unsigned int num_irqs; unsigned int irqs[]; }; +static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power) +{ + /* + * Polling is only necessary while VBUS is offline. While online, a + * present->absent transition implies an online->offline transition + * and will triger the VBUS_REMOVAL IRQ. + */ + if (power->axp20x_id >= AXP221_ID && !power->online) + return true; + + return false; +} + static irqreturn_t axp20x_usb_power_irq(int irq, void *devid) { struct axp20x_usb_power *power = devid; power_supply_changed(power->supply); + mod_delayed_work(system_wq, &power->vbus_detect, DEBOUNCE_TIME); + return IRQ_HANDLED; } @@ -97,17 +113,11 @@ static void axp20x_usb_power_poll_vbus(struct work_struct *work) power_supply_changed(power->supply); power->old_status = val; + power->online = val & AXP20X_PWR_STATUS_VBUS_USED; out: - mod_delayed_work(system_wq, &power->vbus_detect, DEBOUNCE_TIME); -} - -static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power) -{ - if (power->axp20x_id >= AXP221_ID) - return true; - - return false; + if (axp20x_usb_vbus_needs_polling(power)) + mod_delayed_work(system_wq, &power->vbus_detect, DEBOUNCE_TIME); } static int axp20x_get_current_max(struct axp20x_usb_power *power, int *val) @@ -515,6 +525,8 @@ static int axp20x_usb_power_resume(struct device *dev) while (i < power->num_irqs) enable_irq(power->irqs[i++]); + mod_delayed_work(system_wq, &power->vbus_detect, DEBOUNCE_TIME); + return 0; } #endif |