diff mbox series

[2/6] can: rcar_canfd: Add max_channels to struct rcar_canfd_hw_info

Message ID 20221022104357.1276740-3-biju.das.jz@bp.renesas.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series R-Can CAN FD driver enhancements | expand

Checks

Context Check Description
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Biju Das Oct. 22, 2022, 10:43 a.m. UTC 
R-Car V3U supports a maximum of 8 channels whereas rest of the SoCs
support 2 channels.

Add max_channels variable to struct rcar_canfd_hw_info to handle this
difference.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 drivers/net/can/rcar/rcar_canfd.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

Comments

Geert Uytterhoeven Oct. 24, 2022, 2:41 p.m. UTC | #1 
On Sat, Oct 22, 2022 at 1:13 PM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> R-Car V3U supports a maximum of 8 channels whereas rest of the SoCs
> support 2 channels.
>
> Add max_channels variable to struct rcar_canfd_hw_info to handle this
> difference.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

> --- a/drivers/net/can/rcar/rcar_canfd.c
> +++ b/drivers/net/can/rcar/rcar_canfd.c
> @@ -525,6 +525,7 @@ struct rcar_canfd_global;
>
>  struct rcar_canfd_hw_info {
>         enum rcanfd_chip_id chip_id;
> +       u32 max_channels;

Although I wouldn't mind "unsigned int" instead...

>  };
>
>  /* Channel priv data */

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
Biju Das Oct. 24, 2022, 5:17 p.m. UTC | #2 
Hi Geert,

Thanks for the feedback.

> <biju.das@bp.renesas.com>; linux-renesas-soc@vger.kernel.org
> Subject: Re: [PATCH 2/6] can: rcar_canfd: Add max_channels to struct
> rcar_canfd_hw_info
> 
> On Sat, Oct 22, 2022 at 1:13 PM Biju Das <biju.das.jz@bp.renesas.com>
> wrote:
> > R-Car V3U supports a maximum of 8 channels whereas rest of the SoCs
> > support 2 channels.
> >
> > Add max_channels variable to struct rcar_canfd_hw_info to handle
> this
> > difference.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> 
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> > --- a/drivers/net/can/rcar/rcar_canfd.c
> > +++ b/drivers/net/can/rcar/rcar_canfd.c
> > @@ -525,6 +525,7 @@ struct rcar_canfd_global;
> >
> >  struct rcar_canfd_hw_info {
> >         enum rcanfd_chip_id chip_id;
> > +       u32 max_channels;
> 
> Although I wouldn't mind "unsigned int" instead...

OK. Agreed will change it to unsigned int.

Cheers,
Biju
diff mbox series

Patch

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 7bdbda1f1f12..ecd7c0df2ded 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -525,6 +525,7 @@  struct rcar_canfd_global;
 
 struct rcar_canfd_hw_info {
 	enum rcanfd_chip_id chip_id;
+	u32 max_channels;
 };
 
 /* Channel priv data */
@@ -553,7 +554,6 @@  struct rcar_canfd_global {
 	struct reset_control *rstc1;
 	struct reset_control *rstc2;
 	const struct rcar_canfd_hw_info *info;
-	u32 max_channels;
 };
 
 /* CAN FD mode nominal rate constants */
@@ -597,14 +597,17 @@  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,
 };
 
 static const struct rcar_canfd_hw_info rzg2l_hw_info = {
 	.chip_id = RENESAS_RZG2L,
+	.max_channels = 2,
 };
 
 static const struct rcar_canfd_hw_info r8a779a0_hw_info = {
 	.chip_id = RENESAS_R8A779A0,
+	.max_channels = 8,
 };
 
 /* Helper functions */
@@ -738,7 +741,7 @@  static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 	rcar_canfd_set_mode(gpriv);
 
 	/* Transition all Channels to reset mode */
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_clear_bit(gpriv->base,
 				     RCANFD_CCTR(ch), RCANFD_CCTR_CSLPR);
 
@@ -779,7 +782,7 @@  static void rcar_canfd_configure_controller(struct rcar_canfd_global *gpriv)
 	rcar_canfd_set_bit(gpriv->base, RCANFD_GCFG, cfg);
 
 	/* Channel configuration settings */
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_set_bit(gpriv->base, RCANFD_CCTR(ch),
 				   RCANFD_CCTR_ERRD);
 		rcar_canfd_update_bit(gpriv->base, RCANFD_CCTR(ch),
@@ -1163,7 +1166,7 @@  static irqreturn_t rcar_canfd_global_err_interrupt(int irq, void *dev_id)
 	struct rcar_canfd_global *gpriv = dev_id;
 	u32 ch;
 
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels)
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels)
 		rcar_canfd_handle_global_err(gpriv, ch);
 
 	return IRQ_HANDLED;
@@ -1201,7 +1204,7 @@  static irqreturn_t rcar_canfd_global_receive_fifo_interrupt(int irq, void *dev_i
 	struct rcar_canfd_global *gpriv = dev_id;
 	u32 ch;
 
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels)
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels)
 		rcar_canfd_handle_global_receive(gpriv, ch);
 
 	return IRQ_HANDLED;
@@ -1215,7 +1218,7 @@  static irqreturn_t rcar_canfd_global_interrupt(int irq, void *dev_id)
 	/* Global error interrupts still indicate a condition specific
 	 * to a channel. RxFIFO interrupt is a global interrupt.
 	 */
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_handle_global_err(gpriv, ch);
 		rcar_canfd_handle_global_receive(gpriv, ch);
 	}
@@ -1311,7 +1314,7 @@  static irqreturn_t rcar_canfd_channel_interrupt(int irq, void *dev_id)
 	u32 ch;
 
 	/* Common FIFO is a per channel resource */
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_handle_channel_err(gpriv, ch);
 		rcar_canfd_handle_channel_tx(gpriv, ch);
 	}
@@ -1855,17 +1858,15 @@  static int rcar_canfd_probe(struct platform_device *pdev)
 	int err, ch_irq, g_irq;
 	int g_err_irq, g_recc_irq;
 	bool fdmode = true;			/* CAN FD only mode - default */
-	int max_channels;
 	char name[9] = "channelX";
 	int i;
 
 	info = of_device_get_match_data(&pdev->dev);
-	max_channels = info->chip_id == RENESAS_R8A779A0 ? 8 : 2;
 
 	if (of_property_read_bool(pdev->dev.of_node, "renesas,no-can-fd"))
 		fdmode = false;			/* Classical CAN only mode */
 
-	for (i = 0; i < max_channels; ++i) {
+	for (i = 0; i < info->max_channels; ++i) {
 		name[7] = '0' + i;
 		of_child = of_get_child_by_name(pdev->dev.of_node, name);
 		if (of_child && of_device_is_available(of_child))
@@ -1908,7 +1909,6 @@  static int rcar_canfd_probe(struct platform_device *pdev)
 	gpriv->channels_mask = channels_mask;
 	gpriv->fdmode = fdmode;
 	gpriv->info = info;
-	gpriv->max_channels = max_channels;
 
 	gpriv->rstc1 = devm_reset_control_get_optional_exclusive(&pdev->dev,
 								 "rstp_n");
@@ -2023,7 +2023,7 @@  static int rcar_canfd_probe(struct platform_device *pdev)
 	rcar_canfd_configure_controller(gpriv);
 
 	/* Configure per channel attributes */
-	for_each_set_bit(ch, &gpriv->channels_mask, max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, info->max_channels) {
 		/* Configure Channel's Rx fifo */
 		rcar_canfd_configure_rx(gpriv, ch);
 
@@ -2049,7 +2049,7 @@  static int rcar_canfd_probe(struct platform_device *pdev)
 		goto fail_mode;
 	}
 
-	for_each_set_bit(ch, &gpriv->channels_mask, max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, info->max_channels) {
 		err = rcar_canfd_channel_probe(gpriv, ch, fcan_freq);
 		if (err)
 			goto fail_channel;
@@ -2061,7 +2061,7 @@  static int rcar_canfd_probe(struct platform_device *pdev)
 	return 0;
 
 fail_channel:
-	for_each_set_bit(ch, &gpriv->channels_mask, max_channels)
+	for_each_set_bit(ch, &gpriv->channels_mask, info->max_channels)
 		rcar_canfd_channel_remove(gpriv, ch);
 fail_mode:
 	rcar_canfd_disable_global_interrupts(gpriv);
@@ -2082,7 +2082,7 @@  static int rcar_canfd_remove(struct platform_device *pdev)
 	rcar_canfd_reset_controller(gpriv);
 	rcar_canfd_disable_global_interrupts(gpriv);
 
-	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->max_channels) {
+	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_disable_channel_interrupts(gpriv->ch[ch]);
 		rcar_canfd_channel_remove(gpriv, ch);
 	}