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can: mcp251xfd: Add support for internal loopback mode

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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: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[mkl: mcp251xfd_get_normal_mode(): move CAN_CTRLMODE_LOOPBACK check to front]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Manivannan Sadhasivam 2020-12-01 11:10:19 +05:30 committed by Marc Kleine-Budde
parent 2c0ac92081
commit ee42bedc85
1 changed files with 7 additions and 4 deletions
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11
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
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@ -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;