Commit ee42bedc authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Marc Kleine-Budde
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can: mcp251xfd: Add support for internal loopback mode 

MCP251xFD supports internal loopback mode which can be used to verify CAN
functionality in the absence of a real CAN device.

Link: https://lore.kernel.org/r/20201201054019.11012-1-manivannan.sadhasivam@linaro.org


Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[mkl: mcp251xfd_get_normal_mode(): move CAN_CTRLMODE_LOOPBACK check to front]
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 2c0ac920

drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c

+7 −4
Original line number Diff line number Diff line
@@ -965,7 +965,10 @@ static u8 mcp251xfd_get_normal_mode(const struct mcp251xfd_priv *priv) 
{

	u8 mode;



	if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)



	if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)

		mode = MCP251XFD_REG_CON_MODE_INT_LOOPBACK;

	else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)

		mode = MCP251XFD_REG_CON_MODE_LISTENONLY;

	else if (priv->can.ctrlmode & CAN_CTRLMODE_FD)

		mode = MCP251XFD_REG_CON_MODE_MIXED;
@@ -2881,9 +2884,9 @@ static int mcp251xfd_probe(struct spi_device *spi) 
	priv->can.do_get_berr_counter = mcp251xfd_get_berr_counter;

	priv->can.bittiming_const = &mcp251xfd_bittiming_const;

	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;

	priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |

		CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_BERR_REPORTING |

		CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO;

	priv->ndev = ndev;

	priv->spi = spi;

	priv->rx_int = rx_int;

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