[PATCH v2 1/4] clk: add of_clk_src_onecell_get() support
Shawn Guo
shawn.guo at linaro.org
Fri Aug 31 16:41:27 EST 2012
Ping, Mike.
Regards,
Shawn
On Wed, Aug 22, 2012 at 09:36:27PM +0800, Shawn Guo wrote:
> For those SoCs that have hundreds of clock outputs, their clock
> DT bindings could reasonably define #clock-cells as 1 and require
> the client device specify the index of the clock it consumes in the
> cell of its "clocks" phandle.
>
> Add a generic of_clk_src_onecell_get() function for this purpose.
>
> Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> ---
> drivers/clk/clk.c | 14 ++++++++++++++
> include/linux/clk-provider.h | 5 +++++
> 2 files changed, 19 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index efdfd00..308f058 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -1582,6 +1582,20 @@ struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
> }
> EXPORT_SYMBOL_GPL(of_clk_src_simple_get);
>
> +struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data)
> +{
> + struct clk_onecell_data *clk_data = data;
> + unsigned int idx = clkspec->args[0];
> +
> + if (idx >= clk_data->clk_num) {
> + pr_err("%s: invalid clock index %d\n", __func__, idx);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + return clk_data->clks[idx];
> +}
> +EXPORT_SYMBOL_GPL(of_clk_src_onecell_get);
> +
> /**
> * of_clk_add_provider() - Register a clock provider for a node
> * @np: Device node pointer associated with clock provider
> diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
> index 77335fa..8fe6ec7 100644
> --- a/include/linux/clk-provider.h
> +++ b/include/linux/clk-provider.h
> @@ -360,6 +360,11 @@ int of_clk_add_provider(struct device_node *np,
> void of_clk_del_provider(struct device_node *np);
> struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
> void *data);
> +struct clk_onecell_data {
> + struct clk **clks;
> + unsigned int clk_num;
> +};
> +struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
> const char *of_clk_get_parent_name(struct device_node *np, int index);
> void of_clk_init(const struct of_device_id *matches);
>
> --
> 1.7.5.4
>
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