can: dev: add CAN interface API for fixed bitrates

Some CAN interfaces only support fixed fixed bitrates. This patch adds a
netlink interface to get the list of the CAN interface's fixed bitrates and
data bitrates.

Inside the driver arrays of supported data- bitrate values are defined.

const u32 drvname_bitrate[] = { 20000, 50000, 100000 };
const u32 drvname_data_bitrate[] = { 200000, 500000, 1000000 };

struct drvname_priv *priv;
priv = netdev_priv(dev);

priv->bitrate_const = drvname_bitrate;
priv->bitrate_const_cnt = ARRAY_SIZE(drvname_bitrate);
priv->data_bitrate_const = drvname_data_bitrate;
priv->data_bitrate_const_cnt = ARRAY_SIZE(drvname_data_bitrate);

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/linux/can/netlink.h b/include/uapi/linux/can/netlink.h
index 7414771926fb..fdf75f74fdaf 100644
--- a/include/uapi/linux/can/netlink.h
+++ b/include/uapi/linux/can/netlink.h
@@ -129,6 +129,8 @@ enum {
         IFLA_CAN_DATA_BITTIMING_CONST,
         IFLA_CAN_TERMINATION,
         IFLA_CAN_TERMINATION_CONST,
+        IFLA_CAN_BITRATE_CONST,
+        IFLA_CAN_DATA_BITRATE_CONST,
         __IFLA_CAN_MAX
 };