linux-kernel - Re: [PATCH 2/3] clk: conf: Support assigned-clock-sscs

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Message-ID: <aJ7nCL0PS0DX8rtk@stanley.mountain>
Date: Fri, 15 Aug 2025 10:51:36 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Peng Fan <peng.fan@....nxp.com>
Cc: Peng Fan <peng.fan@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Marco Felsch <m.felsch@...gutronix.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
	arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] clk: conf: Support assigned-clock-sscs

On Fri, Aug 15, 2025 at 04:50:42PM +0800, Peng Fan wrote:
> >> +		if (modfreq_hz || spread_bp || method) {
> >> +			rc = of_parse_phandle_with_args(node, "assigned-clocks",
> >> +					"#clock-cells",	index, &clkspec);
> >> +			if (rc < 0) {
> >> +				/* skip empty (null) phandles */
> >> +				if (rc == -ENOENT)
> >> +					continue;
> >> +				else
> >> +					return rc;
> >> +			}
> >> +
> >> +			if (clkspec.np == node && !clk_supplier) {
> >
> >Could you add a comment for this condition?  It's strange to me that we
> >don't iterate through the whole array.
> 
> I just follow the logic in __set_clk_parents and __set_clk_rates, nothing
> special here.
> 
> It is just like to phase out cases as below:
>   node-x {
> 	/* node-x is not a clk provider, but assigned-clocks uses node-x phandle */
> 	assigned-clocks = <&node-x   XYZ>;
>   }
> 

Ah.  Great.  Thanks.

regards,
dan carpenter