diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpi_lpss.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c index bd3e84a59863..a10c2d665ec2 100644 --- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -599,6 +599,34 @@ static void acpi_lpss_d3_to_d0_delay(struct lpss_private_data *pdata) msleep(delay); } +static int acpi_lpss_activate(struct device *dev) +{ + struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev)); + int ret; + + ret = acpi_dev_runtime_resume(dev); + if (ret) + return ret; + + acpi_lpss_d3_to_d0_delay(pdata); + + /* + * This is called only on ->probe() stage where a device is either in + * known state defined by BIOS or most likely powered off. Due to this + * we have to deassert reset line to be sure that ->probe() will + * recognize the device. + */ + if (pdata->dev_desc->flags & LPSS_SAVE_CTX) + lpss_deassert_reset(pdata); + + return 0; +} + +static void acpi_lpss_dismiss(struct device *dev) +{ + acpi_dev_runtime_suspend(dev); +} + #ifdef CONFIG_PM_SLEEP static int acpi_lpss_suspend_late(struct device *dev) { @@ -667,6 +695,10 @@ static int acpi_lpss_runtime_resume(struct device *dev) #endif /* CONFIG_PM */ static struct dev_pm_domain acpi_lpss_pm_domain = { +#ifdef CONFIG_PM + .activate = acpi_lpss_activate, + .dismiss = acpi_lpss_dismiss, +#endif .ops = { #ifdef CONFIG_PM #ifdef CONFIG_PM_SLEEP |