Add three macro to simplify the readibility of big bittiming numbers:
- CAN_KBPS: kilobits per second (one thousand)
- CAN_MBPS: megabits per second (one million)
- CAN_MHZ: megahertz per second (one million)
Example:
u32 bitrate_max = 8 * CAN_MBPS;
struct can_clock clock = {.freq = 80 * CAN_MHZ};
instead of:
u32 bitrate_max = 8000000;
struct can_clock clock = {.freq = 80000000};
Apply the new macro to driver/net/can/dev/bittiming.c.
Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
---
drivers/net/can/dev/bittiming.c | 4 ++--
include/linux/can/bittiming.h | 7 +++++++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/dev/bittiming.c b/drivers/net/can/dev/bittiming.c
index 5d6c2f217210..853b0ffb443c 100644
--- a/drivers/net/can/dev/bittiming.c
+++ b/drivers/net/can/dev/bittiming.c
@@ -81,9 +81,9 @@ int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
if (bt->sample_point) {
sample_point_nominal = bt->sample_point;
} else {
- if (bt->bitrate > 800000)
+ if (bt->bitrate > 800 * CAN_KBPS)
sample_point_nominal = 750;
- else if (bt->bitrate > 500000)
+ else if (bt->bitrate > 500 * CAN_KBPS)
sample_point_nominal = 800;
else
sample_point_nominal = 875;
diff --git a/include/linux/can/bittiming.h b/include/linux/can/bittiming.h
index 3c4cad7b52c0..2450b94f535c 100644
--- a/include/linux/can/bittiming.h
+++ b/include/linux/can/bittiming.h
@@ -11,6 +11,13 @@
#define CAN_SYNC_SEG 1
+/* Kilobits and Megabits per second */
+#define CAN_KBPS 1000UL
+#define CAN_MBPS 1000000UL
+
+/* Megahertz */
+#define CAN_MHZ 1000000UL
+
/*
* struct can_tdc - CAN FD Transmission Delay Compensation parameters
*
base-commit: 69436537f3461627d1ad3beccb19a4dc772cbd6a
--
2.26.2
