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>

diff --git a/drivers/staging/greybus/greybus_protocols.h b/drivers/staging/greybus/greybus_protocols.h
index 2a48d95ea1b89228cceda900def689fecbb16940..3f51fb5d6e8b45e48a1cad4f56a3cc0af9d55b20 100644 (file)
--- a/drivers/staging/greybus/greybus_protocols.h
+++ b/drivers/staging/greybus/greybus_protocols.h
@@ -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

diff --git a/drivers/staging/greybus/svc.c b/drivers/staging/greybus/svc.c
index ad04a952cb36e4cc3652615f6664a97ab2d5bc43..8c675d3215e16fb1199401b618f4db8b750b2342 100644 (file)
--- a/drivers/staging/greybus/svc.c
+++ b/drivers/staging/greybus/svc.c
@@ -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;

diff --git a/drivers/staging/greybus/svc.h b/drivers/staging/greybus/svc.h
index f079b4dcc6e6107b7c1ab3b4f899ca260dd1b4a7..f3e8479b9438a54723c6d09966848fffb9f7b5f0 100644 (file)
--- a/drivers/staging/greybus/svc.h
+++ b/drivers/staging/greybus/svc.h
@@ -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);