Hi Uli,
On Mon, Dec 21, 2020 at 5:55 PM Ulrich Hecht <uli+renesas@xxxxxxxx> wrote:
> This patch adds config macros describing the voltage levels available on
> a pin. The current default (3.3V/1.8V) maps to zero to avoid having to
> change existing PFC implementations.
>
> Signed-off-by: Ulrich Hecht <uli+renesas@xxxxxxxx>
> --- a/drivers/pinctrl/renesas/pinctrl.c
> +++ b/drivers/pinctrl/renesas/pinctrl.c
> @@ -634,6 +634,9 @@ static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin,
> }
>
> case PIN_CONFIG_POWER_SOURCE: {
> + int idx = sh_pfc_get_pin_index(pfc, _pin);
> + const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
> + int lower_voltage;
> u32 pocctrl, val;
> int bit;
>
> @@ -648,7 +651,10 @@ static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin,
> val = sh_pfc_read(pfc, pocctrl);
> spin_unlock_irqrestore(&pfc->lock, flags);
>
> - arg = (val & BIT(bit)) ? 3300 : 1800;
> + lower_voltage = (pin->configs & SH_PFC_PIN_VOLTAGE_25_33) ?
> + 2500 : 1800;
> +
> + arg = (val & BIT(bit)) ? 3300 : lower_voltage;
Alternatively, .pin_to_pocctrl() could return mV_low and mV_high?
That would require updating all subdrivers, though.
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
