On 18.02.2025 10:49:59, Biju Das wrote:
> The CAN-FD IP found on the RZ/G3E SoC is similar to R-Car Gen4, but
> it has no external clock instead it has clk_ram, it has 6 channels
> and supports 20 interrupts. Add support for RZ/G3E CAN-FD driver.
>
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> ---
> drivers/net/can/rcar/rcar_canfd.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
> index d6d7ba3e9ca1..69ccd69f68dd 100644
> --- a/drivers/net/can/rcar/rcar_canfd.c
> +++ b/drivers/net/can/rcar/rcar_canfd.c
> @@ -607,6 +607,14 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = {
> .multi_channel_irqs = 1,
> };
>
> +static const struct rcar_canfd_hw_info r9a09g047_hw_info = {
> + .max_channels = 6,
> + .postdiv = 1,
> + .multi_channel_irqs = 1,
> + .gen4_type = 1,
> + .only_internal_clks = 1,
> +};
> +
> /* Helper functions */
> static inline bool is_gen4(struct rcar_canfd_global *gpriv)
> {
> @@ -1861,6 +1869,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
> u32 rule_entry = 0;
> bool fdmode = true; /* CAN FD only mode - default */
> char name[9] = "channelX";
> + struct clk *clk_ram;
> int i;
>
> info = of_device_get_match_data(dev);
> @@ -1950,6 +1959,11 @@ static int rcar_canfd_probe(struct platform_device *pdev)
> gpriv->extclk = !gpriv->info->only_internal_clks;
> }
>
> + clk_ram = devm_clk_get_optional_enabled(dev, "ram_clk");
This will keep the clock enabled, even if the interface is down. Do you
care for a more fine grained clock handling?
> + if (IS_ERR(clk_ram))
> + return dev_err_probe(dev, PTR_ERR(clk_ram),
> + "cannot get ram clock\n");
> +
> addr = devm_platform_ioremap_resource(pdev, 0);
> if (IS_ERR(addr)) {
> err = PTR_ERR(addr);
> @@ -2112,6 +2126,7 @@ static SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
>
> static const __maybe_unused struct of_device_id rcar_canfd_of_table[] = {
> { .compatible = "renesas,r8a779a0-canfd", .data = &rcar_gen4_hw_info },
> + { .compatible = "renesas,r9a09g047-canfd", .data = &r9a09g047_hw_info },
> { .compatible = "renesas,rcar-gen3-canfd", .data = &rcar_gen3_hw_info },
> { .compatible = "renesas,rcar-gen4-canfd", .data = &rcar_gen4_hw_info },
> { .compatible = "renesas,rzg2l-canfd", .data = &rzg2l_hw_info },
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
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Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |
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