diff options
Diffstat (limited to 'drivers/ata/libata-acpi.c')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index f2140fc06ba0..4782e0f22d7f 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -246,6 +246,47 @@ void ata_acpi_bind_dev(struct ata_device *dev) } /** + * ata_acpi_port_power_on - set the power state of the ata port to D0 + * @ap: target ATA port + * + * This function is called at the beginning of ata_port_probe(). + */ +void ata_acpi_port_power_on(struct ata_port *ap) +{ + acpi_handle handle; + int i; + + /* + * If ATA_FLAG_ACPI_SATA is set, the acpi fwnode is attached to the + * ata_device instead of the ata_port. + */ + if (ap->flags & ATA_FLAG_ACPI_SATA) { + for (i = 0; i < ATA_MAX_DEVICES; i++) { + struct ata_device *dev = &ap->link.device[i]; + + if (!is_acpi_device_node(dev->tdev.fwnode)) + continue; + handle = ACPI_HANDLE(&dev->tdev); + if (!acpi_bus_power_manageable(handle)) + continue; + if (acpi_bus_set_power(handle, ACPI_STATE_D0)) + ata_dev_err(dev, + "acpi: failed to set power state to D0\n"); + } + return; + } + + if (!is_acpi_device_node(ap->tdev.fwnode)) + return; + handle = ACPI_HANDLE(&ap->tdev); + if (!acpi_bus_power_manageable(handle)) + return; + + if (acpi_bus_set_power(handle, ACPI_STATE_D0)) + ata_port_err(ap, "acpi: failed to set power state to D0\n"); +} + +/** * ata_acpi_dissociate - dissociate ATA host from ACPI objects * @host: target ATA host * |