[U-Boot] [PATCH v4 09/13] dm: clk: Define clk_get_by_id() for clk operations

[Peng Fan]

> Subject: [PATCH v4 09/13] dm: clk: Define clk_get_by_id() for clk operations
> 
> This commit adds the clk_get_by_id() function, which is responsible for getting
> the udevice with matching clk->id. Such approach allows re-usage of inherit
> DM list relationship for the same class (UCLASS_CLK).
> As a result - we don't need any other external list - it is just enough to look for
> UCLASS_CLK related udevices.
> 
> Signed-off-by: Lukasz Majewski <lukma at denx.de>
> 
> ---
> 
> Changes in v4: None
> Changes in v3:
> - Replace -ENODEV with -ENOENT
> - Use **clkp instead of **c
> 
>  drivers/clk/clk-uclass.c | 22 ++++++++++++++++++++++
>  include/clk.h            | 11 +++++++++++
>  2 files changed, 33 insertions(+)
> 
> diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index
> ea43871112..6f054396e3 100644
> --- a/drivers/clk/clk-uclass.c
> +++ b/drivers/clk/clk-uclass.c
> @@ -490,6 +490,28 @@ int clk_disable_bulk(struct clk_bulk *bulk)
>  	return 0;
>  }
> 
> +int clk_get_by_id(ulong id, struct clk **clkp) {
> +	struct udevice *dev;
> +	struct uclass *uc;
> +	int ret;
> +
> +	ret = uclass_get(UCLASS_CLK, &uc);
> +	if (ret)
> +		return ret;
> +
> +	uclass_foreach_dev(dev, uc) {
> +		struct clk *clk = (struct clk *)dev_get_driver_data(dev);
> +
> +		if (clk && clk->id == id) {
> +			*clkp = clk;
> +			return 0;
> +		}
> +	}
> +
> +	return -ENOENT;
> +}
> +
>  UCLASS_DRIVER(clk) = {
>  	.id		= UCLASS_CLK,
>  	.name		= "clk",
> diff --git a/include/clk.h b/include/clk.h index 955699eb18..32ac2386ed
> 100644
> --- a/include/clk.h
> +++ b/include/clk.h
> @@ -345,4 +345,15 @@ static inline bool clk_valid(struct clk *clk)  {
>  	return !!clk->dev;
>  }
> +
> +/**
> + * clk_get_by_id() - Get the clock by its ID
> + *
> + * @id:	The clock ID to search for
> + *
> + * @clkp:	A pointer to clock struct that has been found among added
> clocks
> + *              to UCLASS_CLK
> + * @return zero on success, or -ENOENT on error  */ int
> +clk_get_by_id(ulong id, struct clk **clkp);

Reviewed-by: Peng Fan <peng.fan at nxp.com>

>  #endif
> --
> 2.11.0