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greybus: svc: add ping command 

This implements the SVC "ping" command.  It's tiny and simple, but we
need something like this in order for us to "know" if all is working
well.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2016-01-19 23:30:42 -08:00
parent eb8fafdfb9
commit 55ec09e898
3 changed files with 9 additions and 0 deletions
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1
drivers/staging/greybus/greybus_protocols.h
View File

@ -782,6 +782,7 @@ struct gb_spi_transfer_response {
#define GB_SVC_TYPE_INTF_SET_PWRM 0x10
#define GB_SVC_TYPE_INTF_EJECT 0x11
#define GB_SVC_TYPE_KEY_EVENT 0x12
#define GB_SVC_TYPE_PING 0x13
/*
* SVC version request/response has the same payload as

7
drivers/staging/greybus/svc.c
View File

@ -363,6 +363,13 @@ int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
}
EXPORT_SYMBOL_GPL(gb_svc_intf_set_power_mode);
int gb_svc_ping(struct gb_svc *svc)
{
return gb_operation_sync(svc->connection, GB_SVC_TYPE_PING,
NULL, 0, NULL, 0);
}
EXPORT_SYMBOL_GPL(gb_svc_ping);
static int gb_svc_version_request(struct gb_operation *op)
{
struct gb_connection *connection = op->connection;

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

@ -55,6 +55,7 @@ int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
u8 flags, u32 quirks);
int gb_svc_ping(struct gb_svc *svc);
int gb_svc_protocol_init(void);
void gb_svc_protocol_exit(void);