Re: [PATCH v5 5/7] clk: Use the generic OF phandle parsing in only one place

[Frank Li <Frank.li@oss.nxp.com>]

On Fri, Aug 07, 2026 at 05:24:06PM +0200, Miquel Raynal (Schneider Electric) wrote:
> Ideally, there should be one single entry in the OF world. This way, the
> DT parsing logic is always identical. At this stage, we call
> of_parse_phandle_with_args() in:
> - of_parse_clkspec()
> - of_clk_get_parent_name()
> which kinds of defeats the above statement. Furthermore, when this call
> is done from of_clk_get_parent_name(), we fail to parse the
> 'clock-ranges' property.
>
> Make sure DT world is entered only once by calling of_parse_clkspec()
> from of_clk_get_parent_name(). Doing so implies that we do not try the
> "clock-ranges" path if we already found a "clocks" property.
>
> Suggested-by: Stephen Boyd <sboyd@kernel.org>
> Fixes: 4472287a3b2f5 ("clk: Introduce of_clk_get_hw_from_clkspec()")
> Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@bootlin.com>
> Reviewed-by: Brian Masney <bmasney@redhat.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  drivers/clk/clk.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 7d63d81ebc09..45f5d7a4ccc1 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -5219,6 +5219,8 @@ static int of_parse_clkspec(const struct device_node *np, int index,
>  		 * has a "clock-ranges" property, then we can try one of its
>  		 * clocks.
>  		 */
> +		if (of_property_present(np, "clocks"))
> +			break;
>  		np = np->parent;
>  		if (np && !of_property_present(np, "clock-ranges"))
>  			break;
> @@ -5364,8 +5366,7 @@ const char *of_clk_get_parent_name(const struct device_node *np, int index)
>  	int count;
>  	struct clk *clk;
>
> -	rc = of_parse_phandle_with_args(np, "clocks", "#clock-cells", index,
> -					&clkspec);
> +	rc = of_parse_clkspec(np, index, NULL, &clkspec);
>  	if (rc)
>  		return NULL;
>
>
> --
> 2.54.0
>