Hi Jacopo,
On Wed, Apr 5, 2017 at 4:07 PM, Jacopo Mondi <jacopo+renesas@xxxxxxxxxx> wrote:
> Add combined gpio and pin controller driver for Renesas RZ/A1
> r7s72100 SoC.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> --- /dev/null
> +++ b/drivers/pinctrl/pinctrl-rza1.c
> +/*
> + * Keep this up-to-date with pinconf-generic.h: it performs packing of
> + * pin conf flags and argument during pinconf_generic_parse_dt_config();
> + * we simply discard pinconf argument here
> + */
> +#define PIN_CONF_UNPACK(pinconf) ((pinconf) & 0xffUL)
Perhaps this should be moved to pinconf-generic.h, to make sure it stays
up-to-date?
> +static inline int rza1_get_bit(struct rza1_port *port, unsigned int reg,
I'd use "unsigned int" as the return type.
It doesn't matter much as register values are 16-bit, but people might copy
from this driver when writing their own.
> + unsigned int bit)
> +{
> + void __iomem *mem = RZA1_ADDR(port->base, reg, port->id);
> +
> + return ioread16(mem) & BIT(bit);
> +}
> +static inline int rza1_pin_get_direction(struct rza1_port *port,
> + unsigned int pin)
> +{
> + unsigned long irqflags;
> + int input;
> +
> + spin_lock_irqsave(&port->lock, irqflags);
> + input = rza1_get_bit(port, RZA1_PM_REG, pin);
> + spin_unlock_irqrestore(&port->lock, irqflags);
> +
> + return input;
return !!input;
gpio_chip.get_direction() should return 0, 1, or a negative error value.
> +}
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
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