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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 <dtwlin@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Alex Elder <elder@linaro.org>
hifive-unleashed-5.1
David Lin 2016-07-07 22:07:00 -05:00 committed by Alex Elder
parent f53be0eaf0
commit 30ea26bdd4
3 changed files with 25 additions and 0 deletions
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23
drivers/staging/greybus/control.c
View File

@ -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)
{

1
drivers/staging/greybus/control.h
View File

@ -57,4 +57,5 @@ int gb_control_bundle_resume(struct gb_control *control, u8 bundle_id);
int gb_control_bundle_deactivate(struct gb_control *control, u8 bundle_id);
int gb_control_bundle_activate(struct gb_control *control, u8 bundle_id);
int gb_control_interface_suspend_prepare(struct gb_control *control);
int gb_control_interface_deactivate_prepare(struct gb_control *control);
#endif /* __CONTROL_H */

1
drivers/staging/greybus/greybus_protocols.h
View File

@ -131,6 +131,7 @@ struct gb_protocol_version_response {
#define GB_CONTROL_TYPE_BUNDLE_DEACTIVATE 0x11
#define GB_CONTROL_TYPE_BUNDLE_ACTIVATE 0x12
#define GB_CONTROL_TYPE_INTF_SUSPEND_PREPARE 0x13
#define GB_CONTROL_TYPE_INTF_DEACTIVATE_PREPARE 0x14
struct gb_control_version_request {
__u8 major;