2021-07-21 21:08:24

by Prabhakar Mahadev Lad

[permalink] [raw]
Subject: [PATCH v3 2/3] can: rcar_canfd: Add support for RZ/G2L family

CANFD block on RZ/G2L SoC is almost identical to one found on
R-Car Gen3 SoC's. On RZ/G2L SoC interrupt sources for each channel
are split into different sources and the IP doesn't divide (1/2)
CANFD clock within the IP.

This patch adds compatible string for RZ/G2L family and registers
the irq handlers required for CANFD operation. IRQ numbers are now
fetched based on names instead of indices. For backward compatibility
on non RZ/G2L SoC's we fallback reading based on indices.

Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Biju Das <[email protected]>
---
drivers/net/can/rcar/rcar_canfd.c | 173 +++++++++++++++++++++++++-----
1 file changed, 149 insertions(+), 24 deletions(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 311e6ca3bdc4..04747573fc48 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -37,9 +37,15 @@
#include <linux/bitmap.h>
#include <linux/bitops.h>
#include <linux/iopoll.h>
+#include <linux/reset.h>

#define RCANFD_DRV_NAME "rcar_canfd"

+enum rcanfd_chip_id {
+ RENESAS_RCAR_GEN3 = 0,
+ RENESAS_RZG2L,
+};
+
/* Global register bits */

/* RSCFDnCFDGRMCFG */
@@ -513,6 +519,9 @@ struct rcar_canfd_global {
enum rcar_canfd_fcanclk fcan; /* CANFD or Ext clock */
unsigned long channels_mask; /* Enabled channels mask */
bool fdmode; /* CAN FD or Classical CAN only mode */
+ struct reset_control *rstc1;
+ struct reset_control *rstc2;
+ enum rcanfd_chip_id chip_id;
};

/* CAN FD mode nominal rate constants */
@@ -1577,6 +1586,53 @@ 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 (gpriv->chip_id == RENESAS_RZG2L) {
+ char *irq_name;
+ int err_irq;
+ int tx_irq;
+
+ err_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_err" : "ch1_err");
+ if (err_irq < 0) {
+ err = err_irq;
+ goto fail;
+ }
+
+ tx_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_trx" : "ch1_trx");
+ if (tx_irq < 0) {
+ err = tx_irq;
+ goto fail;
+ }
+
+ irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "canfd.ch%d_err", ch);
+ if (!irq_name) {
+ err = -ENOMEM;
+ goto fail;
+ }
+ err = devm_request_irq(&pdev->dev, err_irq,
+ rcar_canfd_channel_interrupt, 0,
+ irq_name, gpriv);
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq CH Err(%d) failed, error %d\n",
+ err_irq, err);
+ goto fail;
+ }
+ irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "canfd.ch%d_trx", ch);
+ if (!irq_name) {
+ err = -ENOMEM;
+ goto fail;
+ }
+ err = devm_request_irq(&pdev->dev, tx_irq,
+ rcar_canfd_channel_interrupt, 0,
+ irq_name, gpriv);
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq Tx (%d) failed, error %d\n",
+ tx_irq, err);
+ goto fail;
+ }
+ }
+
if (gpriv->fdmode) {
priv->can.bittiming_const = &rcar_canfd_nom_bittiming_const;
priv->can.data_bittiming_const =
@@ -1636,7 +1692,11 @@ static int rcar_canfd_probe(struct platform_device *pdev)
struct device_node *of_child;
unsigned long channels_mask = 0;
int err, ch_irq, g_irq;
+ int g_err_irq, g_recc_irq;
bool fdmode = true; /* CAN FD only mode - default */
+ enum rcanfd_chip_id chip_id;
+
+ chip_id = (enum rcanfd_chip_id)of_device_get_match_data(&pdev->dev);

if (of_property_read_bool(pdev->dev.of_node, "renesas,no-can-fd"))
fdmode = false; /* Classical CAN only mode */
@@ -1649,16 +1709,30 @@ static int rcar_canfd_probe(struct platform_device *pdev)
if (of_child && of_device_is_available(of_child))
channels_mask |= BIT(1); /* Channel 1 */

- ch_irq = platform_get_irq(pdev, 0);
- if (ch_irq < 0) {
- err = ch_irq;
- goto fail_dev;
- }
+ if (chip_id == RENESAS_RCAR_GEN3) {
+ ch_irq = platform_get_irq_byname_optional(pdev, "ch_int");
+ if (ch_irq < 0) {
+ /* For backward compatibility get irq by index */
+ ch_irq = platform_get_irq(pdev, 0);
+ if (ch_irq < 0)
+ return ch_irq;
+ }

- g_irq = platform_get_irq(pdev, 1);
- if (g_irq < 0) {
- err = g_irq;
- goto fail_dev;
+ g_irq = platform_get_irq_byname_optional(pdev, "g_int");
+ if (g_irq < 0) {
+ /* For backward compatibility get irq by index */
+ g_irq = platform_get_irq(pdev, 1);
+ if (g_irq < 0)
+ return g_irq;
+ }
+ } else {
+ g_err_irq = platform_get_irq_byname(pdev, "g_err");
+ if (g_err_irq < 0)
+ return g_err_irq;
+
+ g_recc_irq = platform_get_irq_byname(pdev, "g_recc");
+ if (g_recc_irq < 0)
+ return g_recc_irq;
}

/* Global controller context */
@@ -1670,6 +1744,19 @@ static int rcar_canfd_probe(struct platform_device *pdev)
gpriv->pdev = pdev;
gpriv->channels_mask = channels_mask;
gpriv->fdmode = fdmode;
+ gpriv->chip_id = chip_id;
+
+ if (gpriv->chip_id == RENESAS_RZG2L) {
+ gpriv->rstc1 = devm_reset_control_get_exclusive(&pdev->dev, "rstp_n");
+ if (IS_ERR(gpriv->rstc1))
+ return dev_err_probe(&pdev->dev, PTR_ERR(gpriv->rstc1),
+ "failed to get rstp_n\n");
+
+ gpriv->rstc2 = devm_reset_control_get_exclusive(&pdev->dev, "rstc_n");
+ if (IS_ERR(gpriv->rstc2))
+ return dev_err_probe(&pdev->dev, PTR_ERR(gpriv->rstc2),
+ "failed to get rstc_n\n");
+ }

/* Peripheral clock */
gpriv->clkp = devm_clk_get(&pdev->dev, "fck");
@@ -1699,7 +1786,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
}
fcan_freq = clk_get_rate(gpriv->can_clk);

- if (gpriv->fcan == RCANFD_CANFDCLK)
+ if (gpriv->fcan == RCANFD_CANFDCLK && gpriv->chip_id == RENESAS_RCAR_GEN3)
/* CANFD clock is further divided by (1/2) within the IP */
fcan_freq /= 2;

@@ -1711,20 +1798,51 @@ static int rcar_canfd_probe(struct platform_device *pdev)
gpriv->base = addr;

/* Request IRQ that's common for both channels */
- err = devm_request_irq(&pdev->dev, ch_irq,
- rcar_canfd_channel_interrupt, 0,
- "canfd.chn", gpriv);
- if (err) {
- dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
- ch_irq, err);
- goto fail_dev;
+ if (gpriv->chip_id == RENESAS_RCAR_GEN3) {
+ err = devm_request_irq(&pdev->dev, ch_irq,
+ rcar_canfd_channel_interrupt, 0,
+ "canfd.ch_int", gpriv);
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
+ ch_irq, err);
+ goto fail_dev;
+ }
+
+ err = devm_request_irq(&pdev->dev, g_irq,
+ rcar_canfd_global_interrupt, 0,
+ "canfd.g_int", gpriv);
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
+ g_irq, err);
+ goto fail_dev;
+ }
+ } else {
+ err = devm_request_irq(&pdev->dev, g_recc_irq,
+ rcar_canfd_global_interrupt, 0,
+ "canfd.g_recc", gpriv);
+
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
+ g_recc_irq, err);
+ goto fail_dev;
+ }
+
+ err = devm_request_irq(&pdev->dev, g_err_irq,
+ rcar_canfd_global_interrupt, 0,
+ "canfd.g_err", gpriv);
+ if (err) {
+ dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
+ g_err_irq, err);
+ goto fail_dev;
+ }
}
- err = devm_request_irq(&pdev->dev, g_irq,
- rcar_canfd_global_interrupt, 0,
- "canfd.gbl", gpriv);
+
+ err = reset_control_reset(gpriv->rstc1);
+ if (err)
+ goto fail_dev;
+ err = reset_control_reset(gpriv->rstc2);
if (err) {
- dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
- g_irq, err);
+ reset_control_assert(gpriv->rstc1);
goto fail_dev;
}

@@ -1733,7 +1851,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
if (err) {
dev_err(&pdev->dev,
"failed to enable peripheral clock, error %d\n", err);
- goto fail_dev;
+ goto fail_reset;
}

err = rcar_canfd_reset_controller(gpriv);
@@ -1790,6 +1908,9 @@ static int rcar_canfd_probe(struct platform_device *pdev)
rcar_canfd_disable_global_interrupts(gpriv);
fail_clk:
clk_disable_unprepare(gpriv->clkp);
+fail_reset:
+ reset_control_assert(gpriv->rstc1);
+ reset_control_assert(gpriv->rstc2);
fail_dev:
return err;
}
@@ -1810,6 +1931,9 @@ static int rcar_canfd_remove(struct platform_device *pdev)
/* Enter global sleep mode */
rcar_canfd_set_bit(gpriv->base, RCANFD_GCTR, RCANFD_GCTR_GSLPR);
clk_disable_unprepare(gpriv->clkp);
+ reset_control_assert(gpriv->rstc1);
+ reset_control_assert(gpriv->rstc2);
+
return 0;
}

@@ -1827,7 +1951,8 @@ static SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
rcar_canfd_resume);

static const struct of_device_id rcar_canfd_of_table[] = {
- { .compatible = "renesas,rcar-gen3-canfd" },
+ { .compatible = "renesas,rcar-gen3-canfd", .data = (void *)RENESAS_RCAR_GEN3 },
+ { .compatible = "renesas,rzg2l-canfd", .data = (void *)RENESAS_RZG2L },
{ }
};

--
2.17.1


2021-07-26 09:55:13

by Geert Uytterhoeven

[permalink] [raw]
Subject: Re: [PATCH v3 2/3] can: rcar_canfd: Add support for RZ/G2L family

Hi Prabhakar,

On Wed, Jul 21, 2021 at 9:50 PM Lad Prabhakar
<[email protected]> wrote:
> CANFD block on RZ/G2L SoC is almost identical to one found on
> R-Car Gen3 SoC's. On RZ/G2L SoC interrupt sources for each channel
> are split into different sources and the IP doesn't divide (1/2)
> CANFD clock within the IP.
>
> This patch adds compatible string for RZ/G2L family and registers
> the irq handlers required for CANFD operation. IRQ numbers are now
> fetched based on names instead of indices. For backward compatibility
> on non RZ/G2L SoC's we fallback reading based on indices.
>
> Signed-off-by: Lad Prabhakar <[email protected]>

Thanks for the update!

I think you misunderstood my comment on v1 about the interrupt
handlers, cfr. below.

> --- a/drivers/net/can/rcar/rcar_canfd.c
> +++ b/drivers/net/can/rcar/rcar_canfd.c

> @@ -1577,6 +1586,53 @@ 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 (gpriv->chip_id == RENESAS_RZG2L) {
> + char *irq_name;
> + int err_irq;
> + int tx_irq;
> +
> + err_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_err" : "ch1_err");
> + if (err_irq < 0) {
> + err = err_irq;
> + goto fail;
> + }
> +
> + tx_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_trx" : "ch1_trx");
> + if (tx_irq < 0) {
> + err = tx_irq;
> + goto fail;
> + }
> +
> + irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> + "canfd.ch%d_err", ch);
> + if (!irq_name) {
> + err = -ENOMEM;
> + goto fail;
> + }
> + err = devm_request_irq(&pdev->dev, err_irq,
> + rcar_canfd_channel_interrupt, 0,

This is the same interrupt handler...

> + irq_name, gpriv);
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq CH Err(%d) failed, error %d\n",
> + err_irq, err);
> + goto fail;
> + }
> + irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> + "canfd.ch%d_trx", ch);
> + if (!irq_name) {
> + err = -ENOMEM;
> + goto fail;
> + }
> + err = devm_request_irq(&pdev->dev, tx_irq,
> + rcar_canfd_channel_interrupt, 0,

... as this one.

> + irq_name, gpriv);
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq Tx (%d) failed, error %d\n",
> + tx_irq, err);
> + goto fail;
> + }
> + }
> +
> if (gpriv->fdmode) {
> priv->can.bittiming_const = &rcar_canfd_nom_bittiming_const;
> priv->can.data_bittiming_const =

> @@ -1711,20 +1798,51 @@ static int rcar_canfd_probe(struct platform_device *pdev)
> gpriv->base = addr;
>
> /* Request IRQ that's common for both channels */
> - err = devm_request_irq(&pdev->dev, ch_irq,
> - rcar_canfd_channel_interrupt, 0,
> - "canfd.chn", gpriv);
> - if (err) {
> - dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> - ch_irq, err);
> - goto fail_dev;
> + if (gpriv->chip_id == RENESAS_RCAR_GEN3) {
> + err = devm_request_irq(&pdev->dev, ch_irq,
> + rcar_canfd_channel_interrupt, 0,
> + "canfd.ch_int", gpriv);
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> + ch_irq, err);
> + goto fail_dev;
> + }
> +
> + err = devm_request_irq(&pdev->dev, g_irq,
> + rcar_canfd_global_interrupt, 0,
> + "canfd.g_int", gpriv);
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> + g_irq, err);
> + goto fail_dev;
> + }
> + } else {
> + err = devm_request_irq(&pdev->dev, g_recc_irq,
> + rcar_canfd_global_interrupt, 0,

This is the same interrupt handler...

> + "canfd.g_recc", gpriv);
> +
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> + g_recc_irq, err);
> + goto fail_dev;
> + }
> +
> + err = devm_request_irq(&pdev->dev, g_err_irq,
> + rcar_canfd_global_interrupt, 0,

... as this one.

> + "canfd.g_err", gpriv);
> + if (err) {
> + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> + g_err_irq, err);
> + goto fail_dev;
> + }
> }
> - err = devm_request_irq(&pdev->dev, g_irq,
> - rcar_canfd_global_interrupt, 0,
> - "canfd.gbl", gpriv);
> +
> + err = reset_control_reset(gpriv->rstc1);
> + if (err)
> + goto fail_dev;
> + err = reset_control_reset(gpriv->rstc2);
> if (err) {
> - dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> - g_irq, err);
> + reset_control_assert(gpriv->rstc1);
> goto fail_dev;
> }

I did not object to having fine-grained interrupt handlers on RZ/G2L.
I did object to duplicating code in global and fine-grained interrupt
handlers.

The trick to have both is to let the global interrupt handlers call
(conditionally) into the fine-grained handlers. In pseudo-code:

global_interrupt_handler()
{
if (...)
fine_grained_handler1();

if (...)
fine_grained_handler2();
...
}

On R-Car Gen3, you register the global interrupt handlers, as before.
On RZ/G2L, you register the fine-grained interrupt handlers instead.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

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

2021-07-26 22:00:19

by Prabhakar

[permalink] [raw]
Subject: Re: [PATCH v3 2/3] can: rcar_canfd: Add support for RZ/G2L family

Hi Geert,

Thank you for the review.

On Mon, Jul 26, 2021 at 10:53 AM Geert Uytterhoeven
<[email protected]> wrote:
>
> Hi Prabhakar,
>
> On Wed, Jul 21, 2021 at 9:50 PM Lad Prabhakar
> <[email protected]> wrote:
> > CANFD block on RZ/G2L SoC is almost identical to one found on
> > R-Car Gen3 SoC's. On RZ/G2L SoC interrupt sources for each channel
> > are split into different sources and the IP doesn't divide (1/2)
> > CANFD clock within the IP.
> >
> > This patch adds compatible string for RZ/G2L family and registers
> > the irq handlers required for CANFD operation. IRQ numbers are now
> > fetched based on names instead of indices. For backward compatibility
> > on non RZ/G2L SoC's we fallback reading based on indices.
> >
> > Signed-off-by: Lad Prabhakar <[email protected]>
>
> Thanks for the update!
>
> I think you misunderstood my comment on v1 about the interrupt
> handlers, cfr. below.
>
Argh my bad I took it the other way round!

> > --- a/drivers/net/can/rcar/rcar_canfd.c
> > +++ b/drivers/net/can/rcar/rcar_canfd.c
>
> > @@ -1577,6 +1586,53 @@ 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 (gpriv->chip_id == RENESAS_RZG2L) {
> > + char *irq_name;
> > + int err_irq;
> > + int tx_irq;
> > +
> > + err_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_err" : "ch1_err");
> > + if (err_irq < 0) {
> > + err = err_irq;
> > + goto fail;
> > + }
> > +
> > + tx_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_trx" : "ch1_trx");
> > + if (tx_irq < 0) {
> > + err = tx_irq;
> > + goto fail;
> > + }
> > +
> > + irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> > + "canfd.ch%d_err", ch);
> > + if (!irq_name) {
> > + err = -ENOMEM;
> > + goto fail;
> > + }
> > + err = devm_request_irq(&pdev->dev, err_irq,
> > + rcar_canfd_channel_interrupt, 0,
>
> This is the same interrupt handler...
>
> > + irq_name, gpriv);
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq CH Err(%d) failed, error %d\n",
> > + err_irq, err);
> > + goto fail;
> > + }
> > + irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> > + "canfd.ch%d_trx", ch);
> > + if (!irq_name) {
> > + err = -ENOMEM;
> > + goto fail;
> > + }
> > + err = devm_request_irq(&pdev->dev, tx_irq,
> > + rcar_canfd_channel_interrupt, 0,
>
> ... as this one.
>
> > + irq_name, gpriv);
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq Tx (%d) failed, error %d\n",
> > + tx_irq, err);
> > + goto fail;
> > + }
> > + }
> > +
> > if (gpriv->fdmode) {
> > priv->can.bittiming_const = &rcar_canfd_nom_bittiming_const;
> > priv->can.data_bittiming_const =
>
> > @@ -1711,20 +1798,51 @@ static int rcar_canfd_probe(struct platform_device *pdev)
> > gpriv->base = addr;
> >
> > /* Request IRQ that's common for both channels */
> > - err = devm_request_irq(&pdev->dev, ch_irq,
> > - rcar_canfd_channel_interrupt, 0,
> > - "canfd.chn", gpriv);
> > - if (err) {
> > - dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > - ch_irq, err);
> > - goto fail_dev;
> > + if (gpriv->chip_id == RENESAS_RCAR_GEN3) {
> > + err = devm_request_irq(&pdev->dev, ch_irq,
> > + rcar_canfd_channel_interrupt, 0,
> > + "canfd.ch_int", gpriv);
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > + ch_irq, err);
> > + goto fail_dev;
> > + }
> > +
> > + err = devm_request_irq(&pdev->dev, g_irq,
> > + rcar_canfd_global_interrupt, 0,
> > + "canfd.g_int", gpriv);
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > + g_irq, err);
> > + goto fail_dev;
> > + }
> > + } else {
> > + err = devm_request_irq(&pdev->dev, g_recc_irq,
> > + rcar_canfd_global_interrupt, 0,
>
> This is the same interrupt handler...
>
> > + "canfd.g_recc", gpriv);
> > +
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > + g_recc_irq, err);
> > + goto fail_dev;
> > + }
> > +
> > + err = devm_request_irq(&pdev->dev, g_err_irq,
> > + rcar_canfd_global_interrupt, 0,
>
> ... as this one.
>
> > + "canfd.g_err", gpriv);
> > + if (err) {
> > + dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > + g_err_irq, err);
> > + goto fail_dev;
> > + }
> > }
> > - err = devm_request_irq(&pdev->dev, g_irq,
> > - rcar_canfd_global_interrupt, 0,
> > - "canfd.gbl", gpriv);
> > +
> > + err = reset_control_reset(gpriv->rstc1);
> > + if (err)
> > + goto fail_dev;
> > + err = reset_control_reset(gpriv->rstc2);
> > if (err) {
> > - dev_err(&pdev->dev, "devm_request_irq(%d) failed, error %d\n",
> > - g_irq, err);
> > + reset_control_assert(gpriv->rstc1);
> > goto fail_dev;
> > }
>
> I did not object to having fine-grained interrupt handlers on RZ/G2L.
> I did object to duplicating code in global and fine-grained interrupt
> handlers.
>
> The trick to have both is to let the global interrupt handlers call
> (conditionally) into the fine-grained handlers. In pseudo-code:
>
> global_interrupt_handler()
> {
> if (...)
> fine_grained_handler1();
>
> if (...)
> fine_grained_handler2();
> ...
> }
>
> On R-Car Gen3, you register the global interrupt handlers, as before.
> On RZ/G2L, you register the fine-grained interrupt handlers instead.
>
Agreed will re-spin with the fine-grained version tomorrow.

Cheers,
Prabhakar

> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
>
> 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