netdev - [PATCH 3/6] can: rcar_canfd: Add multi_global_irqs to struct rcar_canfd_hw

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Date:   Sat, 22 Oct 2022 11:43:54 +0100
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Biju Das <biju.das.jz@...renesas.com>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Stefan Mätje <stefan.maetje@....eu>,
        Ulrich Hecht <uli+renesas@...nd.eu>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org
Subject: [PATCH 3/6] can: rcar_canfd: Add multi_global_irqs to struct rcar_canfd_hw_info

RZ/G2L has separate IRQ lines for receive FIFO and global error interrupt
whereas R-Car has combined IRQ line.

Add multi_global_irqs to struct rcar_canfd_hw_info to select the driver to
choose between combined and separate irq registration for global
interrupts.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
 drivers/net/can/rcar/rcar_canfd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index ecd7c0df2ded..0d131694c241 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -526,6 +526,8 @@ struct rcar_canfd_global;
 struct rcar_canfd_hw_info {
 	enum rcanfd_chip_id chip_id;
 	u32 max_channels;
+	/* hardware features */
+	unsigned multi_global_irqs:1;	/* Has multiple global irqs  */
 };
 
 /* Channel priv data */
@@ -603,6 +605,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
 	.chip_id = RENESAS_RZG2L,
 	.max_channels = 2,
+	.multi_global_irqs = 1,
 };
 
 static const struct rcar_canfd_hw_info r8a779a0_hw_info = {
@@ -1874,7 +1877,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 		of_node_put(of_child);
 	}
 
-	if (info->chip_id != RENESAS_RZG2L) {
+	if (!info->multi_global_irqs) {
 		ch_irq = platform_get_irq_byname_optional(pdev, "ch_int");
 		if (ch_irq < 0) {
 			/* For backward compatibility get irq by index */
@@ -1957,7 +1960,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 	gpriv->base = addr;
 
 	/* Request IRQ that's common for both channels */
-	if (info->chip_id != RENESAS_RZG2L) {
+	if (!info->multi_global_irqs) {
 		err = devm_request_irq(&pdev->dev, ch_irq,
 				       rcar_canfd_channel_interrupt, 0,
 				       "canfd.ch_int", gpriv);
-- 
2.25.1