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Commit 30ea26bd authored by David Lin's avatar David Lin Committed by Alex Elder
Browse files

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: default avatarDavid Lin <dtwlin@google.com>
Reviewed-by: default avatarJohan Hovold <johan@hovoldconsulting.com>
Signed-off-by: default avatarAlex Elder <elder@linaro.org>
parent f53be0ea

drivers/staging/greybus/control.c

+23 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/staging/greybus/control.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/staging/greybus/greybus_protocols.h

+1 −0
Original line number Diff line number Diff line
@@ -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;