greybus: remove gb_i2c_timeout_operation

Set timeout operation was removed from the Greybus specification. Remove
gb_i2c_timeout_operation and all other no longer necessary code bits from the
Greybus kernel code.
Signed-off-by: Michael Mogenson <michael.mogenson@leaflabs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_protocols.h

@@ -495,23 +495,16 @@ struct gb_hid_input_report_request {
 
 /* Greybus i2c request types */
 #define GB_I2C_TYPE_FUNCTIONALITY	0x02
-#define GB_I2C_TYPE_TIMEOUT		0x03
 #define GB_I2C_TYPE_RETRIES		0x04
 #define GB_I2C_TYPE_TRANSFER		0x05
 
 #define GB_I2C_RETRIES_DEFAULT		3
-#define GB_I2C_TIMEOUT_DEFAULT		1000	/* milliseconds */
 
 /* functionality request has no payload */
 struct gb_i2c_functionality_response {
 	__le32	functionality;
 } __packed;
 
-struct gb_i2c_timeout_request {
-	__le16	msec;
-} __packed;
-/* timeout response has no payload */
-
 struct gb_i2c_retries_request {
 	__u8	retries;
 } __packed;

drivers/staging/greybus/i2c.c

@@ -18,7 +18,6 @@ struct gb_i2c_device {
 	struct gb_connection	*connection;
 
 	u32			functionality;
-	u16			timeout_msec;
 	u8			retries;
 
 	struct i2c_adapter	adapter;
@@ -50,23 +49,6 @@ static int gb_i2c_functionality_operation(struct gb_i2c_device *gb_i2c_dev)
 	return 0;
 }
 
-static int gb_i2c_timeout_operation(struct gb_i2c_device *gb_i2c_dev, u16 msec)
-{
-	struct device *dev = &gb_i2c_dev->connection->bundle->dev;
-	struct gb_i2c_timeout_request request;
-	int ret;
-
-	request.msec = cpu_to_le16(msec);
-	ret = gb_operation_sync(gb_i2c_dev->connection, GB_I2C_TYPE_TIMEOUT,
-				&request, sizeof(request), NULL, 0);
-	if (ret)
-		dev_err(dev, "timeout operation failed (%d)\n", ret);
-	else
-		gb_i2c_dev->timeout_msec = msec;
-
-	return ret;
-}
-
 static int gb_i2c_retries_operation(struct gb_i2c_device *gb_i2c_dev,
 				u8 retries)
 {
@@ -267,8 +249,8 @@ static const struct i2c_algorithm gb_i2c_algorithm = {
 /*
  * Do initial setup of the i2c device.  This includes verifying we
  * can support it (based on the protocol version it advertises).
- * If that's OK, we get and cached its functionality bits, and
- * set up the retry count and timeout.
+ * If that's OK, we get and cached its functionality bits and
+ * set up the retry count.
  *
  * Note: gb_i2c_dev->connection is assumed to have been valid.
  */
@@ -281,12 +263,8 @@ static int gb_i2c_device_setup(struct gb_i2c_device *gb_i2c_dev)
 	if (ret)
 		return ret;
 
-	/* Set up our default retry count and timeout */
-	ret = gb_i2c_retries_operation(gb_i2c_dev, GB_I2C_RETRIES_DEFAULT);
-	if (ret)
-		return ret;
-
-	return gb_i2c_timeout_operation(gb_i2c_dev, GB_I2C_TIMEOUT_DEFAULT);
+	/* Set up our default retry count */
+	return gb_i2c_retries_operation(gb_i2c_dev, GB_I2C_RETRIES_DEFAULT);
 }
 
 static int gb_i2c_connection_init(struct gb_connection *connection)
@@ -312,7 +290,6 @@ static int gb_i2c_connection_init(struct gb_connection *connection)
 	adapter->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
 	adapter->algo = &gb_i2c_algorithm;
 	/* adapter->algo_data = what? */
-	adapter->timeout = gb_i2c_dev->timeout_msec * HZ / 1000;
 	adapter->retries = gb_i2c_dev->retries;
 
 	adapter->dev.parent = &connection->bundle->dev;