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can: peak_usb: pcan_usb_encode_msg(): add information 

This patch adds information by replacing a hard-coded values with its
symbol and a adding comment.

Link: https://lore.kernel.org/r/20210625130931.27438-5-s.grosjean@peak-system.com
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2021-06-25 15:09:30 +02:00 committed by Marc Kleine-Budde
parent 3a7939495c
commit 1763c54764
1 changed files with 4 additions and 2 deletions
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6
drivers/net/can/usb/peak_usb/pcan_usb.c
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@ -63,6 +63,8 @@
#define PCAN_USB_MSG_HEADER_LEN 2
#define PCAN_USB_MSG_TX_CAN 2 /* Tx msg is a CAN frame */
/* PCAN-USB adapter internal clock (MHz) */
#define PCAN_USB_CRYSTAL_HZ 16000000
@ -834,8 +836,8 @@ static int pcan_usb_encode_msg(struct peak_usb_device *dev, struct sk_buff *skb,
u32 can_id_flags = cf->can_id & CAN_ERR_MASK;
u8 *pc;
obuf[0] = 2;
obuf[1] = 1;
obuf[0] = PCAN_USB_MSG_TX_CAN;
obuf[1] = 1; /* only one CAN frame is stored in the packet */
pc = obuf + PCAN_USB_MSG_HEADER_LEN;