linux-kernel - Re: [PATCH v3 2/4] clk: at91: sama7d65: Add missing clk_hw to parent

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Message-ID: <bcf3089b-04d3-40ad-8673-db0e727fa72e@tuxon.dev>
Date: Mon, 12 May 2025 17:47:16 +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, sboyd@...nel.org
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 2/4] clk: at91: sama7d65: Add missing clk_hw to
 parent_data

Hi, Ryan,

On 06.05.2025 23:04, 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
> the main_osc to not have a parent causing a corrupted clock tree.
> Passing the main_xtal struct into the parent_data struct will
> ensure the correct parent structure for main_osc and a correct clock
> tree.
> 
> Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
> ---
>  drivers/clk/at91/sama7d65.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/at91/sama7d65.c b/drivers/clk/at91/sama7d65.c
> index a5d40df8b2f2..1e9d3c393883 100644
> --- a/drivers/clk/at91/sama7d65.c
> +++ b/drivers/clk/at91/sama7d65.c
> @@ -1100,7 +1100,7 @@ static void __init sama7d65_pmc_setup(struct device_node *np)
>  	struct regmap *regmap;
>  	struct clk_hw *hw, *main_rc_hw, *main_osc_hw, *main_xtal_hw;
>  	struct clk_hw *td_slck_hw, *md_slck_hw;
> -	static struct clk_parent_data parent_data;
> +	static struct clk_parent_data parent_data = {0};
>  	struct clk_hw *parent_hws[10];
>  	bool bypass;
>  	int i, j;
> @@ -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;

Is this line still needed with the initialization of parent data above:

	static struct clk_parent_data parent_data = {0};

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