Hi Paul,
On Tue, Jun 11, 2024 at 1:33 PM Paul Barker
<paul.barker.ct@xxxxxxxxxxxxxx> wrote:
> On the RZ/G2L SoC family, the direction of the Ethernet TXC/TX_CLK
> signal is selectable to support an Ethernet PHY operating in either MII
> or RGMII mode. By default, the signal is configured as an input and MII
> mode is supported. The ETH_MODE register can be modified to configure
> this signal as an output to support RGMII mode.
>
> As this signal is by default an input, and can optionally be switched to
> an output, it maps neatly onto an `output-enable` property in the device
> tree.
>
> Signed-off-by: Paul Barker <paul.barker.ct@xxxxxxxxxxxxxx>
> ---
> Changes v1->v2:
> * Use oen_read and oen_write function pointers to be compatible with
> recent patches adding RZ/V2H support.
Thanks for your patch!
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -994,6 +994,61 @@ static bool rzg2l_ds_is_supported(struct rzg2l_pinctrl *pctrl, u32 caps,
> return false;
> }
>
> +static int rzg2l_pin_to_oen_bit(const struct rzg2l_hwcfg *hwcfg, u32 caps,
> + u32 port, u8 pin)
> +{
> + if (!(caps & PIN_CFG_OEN) || pin > hwcfg->oen_max_pin)
> + return -EINVAL;
> +
> + /*
> + * We can determine which Ethernet interface we're dealing with from
> + * the caps.
> + */
> + if (caps & PIN_CFG_IO_VMC_ETH0)
> + return 0;
> + if (caps & PIN_CFG_IO_VMC_ETH1)
> + return 1;
> +
> + return -EINVAL;
> +}
> +
> +static u32 rzg2l_read_oen(struct rzg2l_pinctrl *pctrl, u32 caps, unsigned int _pin)
rzg2l_oen_read()
> +{
> + u32 port = RZG2L_PIN_ID_TO_PORT(_pin);
> + u8 pin = RZG2L_PIN_ID_TO_PIN(_pin);
> + int bit;
> +
> + bit = rzg2l_pin_to_oen_bit(pctrl->data->hwcfg, caps, port, pin);
> + if (bit < 0)
> + return 0;
> +
> + return !(readb(pctrl->base + ETH_MODE) & BIT(bit));
> +}
> +
> +static int rzg2l_write_oen(struct rzg2l_pinctrl *pctrl, u32 caps, unsigned int _pin, u8 oen)
rzg2l_oen_write()
With these fixed:
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
