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can: dev: add CAN interface API for fixed bitrates

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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>
This commit is contained in:
Marc Kleine-Budde
2017-01-11 17:05:35 +01:00
parent c3606d438a
commit 431af77925
3 changed files with 71 additions and 16 deletions
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4
include/linux/can/dev.h
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@@ -41,6 +41,10 @@ struct can_priv {
const u16 *termination_const;
unsigned int termination_const_cnt;
u16 termination;
const u32 *bitrate_const;
unsigned int bitrate_const_cnt;
const u32 *data_bitrate_const;
unsigned int data_bitrate_const_cnt;
struct can_clock clock;
enum can_state state;