From 30ea26bdd403396c62d6c9fa26477ca1f7af5676 Mon Sep 17 00:00:00 2001 From: David Lin Date: Thu, 7 Jul 2016 22:07:00 -0500 Subject: greybus: control: add interface deactivate prepare operation Add the AP implementation for the Greybus Control Interface Deactivate Prepare Operation. AP uses this Operation during the Power Down transition to request the bridge to power down after it detects a subsequent UniPro link hibernation. Signed-off-by: David Lin Reviewed-by: Johan Hovold Signed-off-by: Alex Elder --- drivers/staging/greybus/control.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/staging/greybus/control.c') diff --git a/drivers/staging/greybus/control.c b/drivers/staging/greybus/control.c index 252352ce..a1c78fc6 100644 --- a/drivers/staging/greybus/control.c +++ b/drivers/staging/greybus/control.c @@ -383,6 +383,29 @@ int gb_control_interface_suspend_prepare(struct gb_control *control) return 0; } +int gb_control_interface_deactivate_prepare(struct gb_control *control) +{ + struct gb_control_intf_pm_response response; + int ret; + + ret = gb_operation_sync(control->connection, + GB_CONTROL_TYPE_INTF_DEACTIVATE_PREPARE, NULL, + 0, &response, sizeof(response)); + if (ret) { + dev_err(&control->dev, "failed to send interface deactivate prepare: %d\n", + ret); + return ret; + } + + if (response.status != GB_CONTROL_INTF_PM_OK) { + dev_err(&control->dev, "interface error while preparing deactivate: %d\n", + response.status); + return gb_control_interface_pm_status_map(response.status); + } + + return 0; +} + static ssize_t vendor_string_show(struct device *dev, struct device_attribute *attr, char *buf) { -- cgit v1.1