can: esd_usb: Replace initializer macros used for struct can_bittiming_const

Replace the macros used to initialize the members of struct
can_bittiming_const with direct values. Then also use those struct
members to do the calculations in esd_usb2_set_bittiming().

Link: https://lore.kernel.org/all/CAMZ6RqLaDNy-fZ2G0+QMhUEckkXLL+ZyELVSDFmqpd++aBzZQg@mail.gmail.com/Suggested-by: Vincent MAILHOL <mailhol.vincent@wanadoo.fr>
Signed-off-by: Frank Jungclaus <frank.jungclaus@esd.eu>
Link: https://lore.kernel.org/r/20230519195600.420644-3-frank.jungclaus@esd.eu
[mkl: esd_usb2_set_bittiming() use esd_usb2_bittiming_const instead of priv->can.bittiming_const]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/esd_usb.c

@@ -60,18 +60,10 @@ MODULE_LICENSE("GPL v2");
 #define ESD_USB_NO_BAUDRATE	GENMASK(30, 0) /* bit rate unconfigured */
 
 /* bit timing CAN-USB/2 */
-#define ESD_USB2_TSEG1_MIN	1
-#define ESD_USB2_TSEG1_MAX	16
 #define ESD_USB2_TSEG1_SHIFT	16
-#define ESD_USB2_TSEG2_MIN	1
-#define ESD_USB2_TSEG2_MAX	8
 #define ESD_USB2_TSEG2_SHIFT	20
-#define ESD_USB2_SJW_MAX	4
 #define ESD_USB2_SJW_SHIFT	14
 #define ESD_USBM_SJW_SHIFT	24
-#define ESD_USB2_BRP_MIN	1
-#define ESD_USB2_BRP_MAX	1024
-#define ESD_USB2_BRP_INC	1
 #define ESD_USB2_3_SAMPLES	BIT(23)
 
 /* esd IDADD message */
@@ -909,18 +901,19 @@ static const struct ethtool_ops esd_usb_ethtool_ops = {
 
 static const struct can_bittiming_const esd_usb2_bittiming_const = {
 	.name = "esd_usb2",
-	.tseg1_min = ESD_USB2_TSEG1_MIN,
-	.tseg1_max = ESD_USB2_TSEG1_MAX,
-	.tseg2_min = ESD_USB2_TSEG2_MIN,
-	.tseg2_max = ESD_USB2_TSEG2_MAX,
-	.sjw_max = ESD_USB2_SJW_MAX,
-	.brp_min = ESD_USB2_BRP_MIN,
-	.brp_max = ESD_USB2_BRP_MAX,
-	.brp_inc = ESD_USB2_BRP_INC,
+	.tseg1_min = 1,
+	.tseg1_max = 16,
+	.tseg2_min = 1,
+	.tseg2_max = 8,
+	.sjw_max = 4,
+	.brp_min = 1,
+	.brp_max = 1024,
+	.brp_inc = 1,
 };
 
 static int esd_usb2_set_bittiming(struct net_device *netdev)
 {
+	const struct can_bittiming_const *btc = &esd_usb2_bittiming_const;
 	struct esd_usb_net_priv *priv = netdev_priv(netdev);
 	struct can_bittiming *bt = &priv->can.bittiming;
 	union esd_usb_msg *msg;
@@ -932,7 +925,7 @@ static int esd_usb2_set_bittiming(struct net_device *netdev)
 	if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
 		canbtr |= ESD_USB_LOM;
 
-	canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1);
+	canbtr |= (bt->brp - 1) & (btc->brp_max - 1);
 
 	if (le16_to_cpu(priv->usb->udev->descriptor.idProduct) ==
 	    USB_CANUSBM_PRODUCT_ID)
@@ -940,12 +933,12 @@ static int esd_usb2_set_bittiming(struct net_device *netdev)
 	else
 		sjw_shift = ESD_USB2_SJW_SHIFT;
 
-	canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1))
+	canbtr |= ((bt->sjw - 1) & (btc->sjw_max - 1))
 		<< sjw_shift;
 	canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1)
-		   & (ESD_USB2_TSEG1_MAX - 1))
+		   & (btc->tseg1_max - 1))
 		<< ESD_USB2_TSEG1_SHIFT;
-	canbtr |= ((bt->phase_seg2 - 1) & (ESD_USB2_TSEG2_MAX - 1))
+	canbtr |= ((bt->phase_seg2 - 1) & (btc->tseg2_max - 1))
 		<< ESD_USB2_TSEG2_SHIFT;
 	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
 		canbtr |= ESD_USB2_3_SAMPLES;