[U-Boot] [linux-sunxi] [PATCH 2/9] sunxi: clk: A80: add MMC clock support

[Chen-Yu Tsai]

On Mon, Jan 21, 2019 at 5:32 PM Jagan Teki <jagan at amarulasolutions.com> wrote:
>
> On Sat, Jan 19, 2019 at 7:02 AM Andre Przywara <andre.przywara at arm.com> wrote:
> >
> > The A80 handles resets and clock gates for the MMC devices differently,
> > outside of the CCU IP block. Consequently we have a separate clock
> > device with a separate binding for that.
> >
> > Implement that with the respective clock gates and resets to allow the
> > A80 taking part in the DM_MMC game.
> >
> > Signed-off-by: Andre Przywara <andre.przywara at arm.com>
> > ---
> >  drivers/clk/sunxi/clk_a80.c | 28 +++++++++++++++++++++++++++-
> >  1 file changed, 27 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/clk/sunxi/clk_a80.c b/drivers/clk/sunxi/clk_a80.c
> > index d6dd6a1fa1..2bfc2ca9f5 100644
> > --- a/drivers/clk/sunxi/clk_a80.c
> > +++ b/drivers/clk/sunxi/clk_a80.c
> > @@ -30,19 +30,45 @@ static const struct ccu_reset a80_resets[] = {
> >         [RST_BUS_UART5]         = RESET(0x5b4, BIT(21)),
> >  };
> >
> > +static const struct ccu_clk_gate a80_mmc_gates[] = {
> > +       [0]                     = GATE(0x0, BIT(16)),
> > +       [1]                     = GATE(0x4, BIT(16)),
> > +       [2]                     = GATE(0x8, BIT(16)),
> > +       [3]                     = GATE(0xc, BIT(16)),
> > +};
> > +
> > +static const struct ccu_reset a80_mmc_resets[] = {
> > +       [0]                     = GATE(0x0, BIT(18)),
> > +       [1]                     = GATE(0x4, BIT(18)),
> > +       [2]                     = GATE(0x8, BIT(18)),
> > +       [3]                     = GATE(0xc, BIT(18)),
> > +};
> > +
> >  static const struct ccu_desc a80_ccu_desc = {
> >         .gates = a80_gates,
> >         .resets = a80_resets,
> >  };
> >
> > +static const struct ccu_desc a80_mmc_clk_desc = {
> > +       .gates = a80_mmc_gates,
> > +       .resets = a80_mmc_resets,
> > +};
> > +
> >  static int a80_clk_bind(struct udevice *dev)
> >  {
> > -       return sunxi_reset_bind(dev, ARRAY_SIZE(a80_resets));
> > +       ulong count = ARRAY_SIZE(a80_resets);
> > +
> > +       if (device_is_compatible(dev, "allwinner,allwinner,sun9i-a80-mmc"))
> > +               count = ARRAY_SIZE(a80_mmc_resets);
> > +
> > +       return sunxi_reset_bind(dev, count);
> >  }
> >
> >  static const struct udevice_id a80_ccu_ids[] = {
> >         { .compatible = "allwinner,sun9i-a80-ccu",
> >           .data = (ulong)&a80_ccu_desc },
> > +       { .compatible = "allwinner,allwinner,sun9i-a80-mmc",
>
> This can be "allwinner,sun9i-a80-mmc-config-clk"

*Must*, not can. :)

ChenYu