> From: Johannes Krottmayer <krj...@gmail.com>
> Date: Sat, 9 Jun 2018 22:22:44 +0200
>
> Hi Mark!
>
> I inform you that I try to write a spi driver for the rk3328. Called
> it rkspi (rkspi.c). Currently I have implement a early version of the
> match and attach functions and it works.
>
> It is based on your rkiic driver.
>
> _The match function_
>
> int
> rkspi_match(struct device *parent, void *match, void *aux)
> {
> struct fdt_attach_args *faa = aux;
>
> return (OF_is_compatible(faa->fa_node, "rockchip,rk3328-spi"));
> }
>
> _The attach function_
>
> void
> rkspi_attach(struct device *parent, struct device *self, void *aux)
> {
> struct rkspi_softc *sc = (struct rkspi_softc *) self;
> struct fdt_attach_args *faa = aux;
>
> if (faa->fa_nreg < 1) {
> printf(": no registers\n");
> return;
> }
>
> sc->sc_iot = faa->fa_iot;
> sc->sc_node = faa->fa_node;
>
> if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
> faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
> printf(": can't map registers\n");
> return;
> }
>
> printf("rkspi_attach success\n");
> }
>
> And this piece of code works:
> $ dmesg | grep rkspi
> rkspi0 at mainbus0
> rkspi_attach success
> $
>
> My next step is, to configure the spi bus and add a read and
> write function.
>
> What do you think about my intention?
That's a very basic start in the right direction.
