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

[Jagan Teki <jagan@amarulasolutions.com>]

On Sat, Jan 19, 2019 at 7:02 AM Andre Przywara <andre.przywara@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@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"