linux-kernel - Re: [PATCH v2 2/4] clk: at91: sama7d65: Add missing clk_hw to parent

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Message-ID: <47b54406-42d8-41cd-a561-9073db09666e@tuxon.dev>
Date: Sat, 26 Apr 2025 16:35:50 +0300
From: Claudiu Beznea <claudiu.beznea@...on.dev>
To: Ryan.Wanner@...rochip.com, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, nicolas.ferre@...rochip.com,
 alexandre.belloni@...tlin.com, mturquette@...libre.com
Cc: sboyd@...nel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 2/4] clk: at91: sama7d65: Add missing clk_hw to
 parent_data

Hi, Ryan,

On 25.03.2025 17:55, Ryan.Wanner@...rochip.com wrote:
> From: Ryan Wanner <Ryan.Wanner@...rochip.com>
> 
> The main_xtal clk_hw struct is not passed into parent_data.hw causing an
> issue with main_osc parent. 

Can you please describe the issue?

> Passing the main_xtal struct into the
> parent_data struct will ensure the correct parent structure.
> 
> Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
> ---
>  drivers/clk/at91/sama7d65.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/at91/sama7d65.c b/drivers/clk/at91/sama7d65.c
> index a5d40df8b2f2..08306261c9c7 100644
> --- a/drivers/clk/at91/sama7d65.c
> +++ b/drivers/clk/at91/sama7d65.c
> @@ -1138,6 +1138,7 @@ static void __init sama7d65_pmc_setup(struct device_node *np)
>  
>  	parent_data.name = main_xtal_name;
>  	parent_data.fw_name = main_xtal_name;
> +	parent_data.hw = main_xtal_hw;

I think, from time to time, you can still hit some random failure as the
parent_data.index is still not initialized. I think the problem may be
solved by doing something like:

-	static struct clk_parent_data parent_data;
+	static struct clk_parent_data parent_data = {0};

Can you please check with this?

Thank you,
Claudiu


>  	main_osc_hw = at91_clk_register_main_osc(regmap, "main_osc", NULL,
>  						 &parent_data, bypass);
>  	if (IS_ERR(main_osc_hw))