can: rcar_canfd: Add multi_channel_irqs to struct rcar_canfd_hw_info

RZ/G2L has separate IRQ lines for tx and error interrupt for each
channel whereas R-Car has a combined IRQ line for all the channel
specific tx and error interrupts.

Add multi_channel_irqs to struct rcar_canfd_hw_info to select the
driver to choose between combined and separate irq registration for
channel interrupts. This patch also removes enum rcanfd_chip_id and
chip_id from both struct rcar_canfd_hw_info, as it is unused.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/20221027082158.95895-6-biju.das.jz@bp.renesas.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/rcar/rcar_canfd.c

@@ -41,12 +41,6 @@
 
 #define RCANFD_DRV_NAME			"rcar_canfd"
 
-enum rcanfd_chip_id {
-	RENESAS_RCAR_GEN3 = 0,
-	RENESAS_RZG2L,
-	RENESAS_R8A779A0,
-};
-
 /* Global register bits */
 
 /* RSCFDnCFDGRMCFG */
@@ -523,11 +517,11 @@ enum rcar_canfd_fcanclk {
 struct rcar_canfd_global;
 
 struct rcar_canfd_hw_info {
-	enum rcanfd_chip_id chip_id;
 	u8 max_channels;
 	u8 postdiv;
 	/* hardware features */
 	unsigned shared_global_irqs:1;	/* Has shared global irqs */
+	unsigned multi_channel_irqs:1;	/* Has multiple channel irqs */
 };
 
 /* Channel priv data */
@@ -598,20 +592,18 @@ static const struct can_bittiming_const rcar_canfd_bittiming_const = {
 };
 
 static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
-	.chip_id = RENESAS_RCAR_GEN3,
 	.max_channels = 2,
 	.postdiv = 2,
 	.shared_global_irqs = 1,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
-	.chip_id = RENESAS_RZG2L,
-	.postdiv = 1,
 	.max_channels = 2,
+	.postdiv = 1,
+	.multi_channel_irqs = 1,
 };
 
 static const struct rcar_canfd_hw_info r8a779a0_hw_info = {
-	.chip_id = RENESAS_R8A779A0,
 	.max_channels = 8,
 	.postdiv = 2,
 	.shared_global_irqs = 1,
@@ -1746,7 +1738,7 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch,
 	priv->can.clock.freq = fcan_freq;
 	dev_info(&pdev->dev, "can_clk rate is %u\n", priv->can.clock.freq);
 
-	if (info->chip_id == RENESAS_RZG2L) {
+	if (info->multi_channel_irqs) {
 		char *irq_name;
 		int err_irq;
 		int tx_irq;