MCP251xFD supports internal loopback mode which can be used to verify CAN functionality in the absence of a real CAN device. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> --- drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c index 3297eb7ecc9c..7715b8b14f29 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c @@ -932,6 +932,8 @@ static u8 mcp251xfd_get_normal_mode(const struct mcp251xfd_priv *priv) mode = MCP251XFD_REG_CON_MODE_LISTENONLY; else if (priv->can.ctrlmode & CAN_CTRLMODE_FD) mode = MCP251XFD_REG_CON_MODE_MIXED; + else if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) + mode = MCP251XFD_REG_CON_MODE_INT_LOOPBACK; else mode = MCP251XFD_REG_CON_MODE_CAN2_0; @@ -2801,7 +2803,7 @@ static int mcp251xfd_probe(struct spi_device *spi) priv->can.data_bittiming_const = &mcp251xfd_data_bittiming_const; priv->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_BERR_REPORTING | CAN_CTRLMODE_FD | - CAN_CTRLMODE_FD_NON_ISO; + CAN_CTRLMODE_FD_NON_ISO | CAN_CTRLMODE_LOOPBACK; priv->ndev = ndev; priv->spi = spi; priv->rx_int = rx_int; -- 2.25.1
