Re: [RFC 07/15] clk: add DT parsing function

[Mike Turquette <mturquette@linaro.org>]

+Stephen Boyd

Quoting Andrzej Hajda (2014-12-10 07:48:25)
> The patch adds function for parsing Device Tree to get
> clock specifier. The function could be ultimately used
> by clock core.
> 
> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
> ---
>  drivers/clk/clkdev.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
> index da4bda8..bd22750 100644
> --- a/drivers/clk/clkdev.c
> +++ b/drivers/clk/clkdev.c
> @@ -120,6 +120,29 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
>         return clk;
>  }
>  EXPORT_SYMBOL(of_clk_get_by_name);
> +
> +static int of_get_clock_spec(struct device *dev, const char *name,
> +               struct of_phandle_args *spec)
> +{
> +       struct device_node *np = dev->of_node;
> +
> +       while (np) {
> +               int idx = 0;
> +
> +               if (name)
> +                       idx = of_property_match_string(np, "clock-names", name);
> +
> +               if (!of_parse_phandle_with_args(np, "clocks", "#clock-cells",
> +                                               idx, spec))
> +                       return 0;
> +
> +               np = np->parent;
> +               if (np && !of_get_property(np, "clock-ranges", NULL))
> +                       break;
> +       }
> +
> +       return -ENOENT;
> +}
>  #endif
>  
>  /*
> -- 
> 1.9.1
>