linux-kernel - Re: [PATCH v3 07/12] gpio: rockchip: support 'clock-names' from dt nodes

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Message-ID: <ZtcyRD3u_C-a27MF@smile.fi.intel.com>
Date: Tue, 3 Sep 2024 18:59:00 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Ye Zhang <ye.zhang@...k-chips.com>
Cc: linus.walleij@...aro.org, brgl@...ev.pl, heiko@...ech.de,
	linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
	mika.westerberg@...ux.intel.com, tao.huang@...k-chips.com,
	finley.xiao@...k-chips.com, tim.chen@...k-chips.com,
	elaine.zhang@...k-chips.com
Subject: Re: [PATCH v3 07/12] gpio: rockchip: support 'clock-names' from dt
 nodes

On Tue, Sep 03, 2024 at 03:36:44PM +0800, Ye Zhang wrote:
> Added support for retrieving clocks using 'clock-names' from dt nodes

...

> +	bank->clk = devm_clk_get_enabled(dev, "bus");

I would use _optional() variant.

> +	if (IS_ERR(bank->clk)) {
> +		bank->clk = of_clk_get(dev->of_node, 0);
> +		if (IS_ERR(bank->clk)) {
> +			dev_err(dev, "fail to get apb clock\n");
> +			return PTR_ERR(bank->clk);
> +		}

> +		clk_prepare_enable(bank->clk);

Why? How was it tested?

> +		bank->manual_clk_release = true;
> +	}

It seems you need to unnest the conditionals and think through the logic.

> +	bank->db_clk = devm_clk_get_enabled(dev, "db");
> +	if (IS_ERR(bank->db_clk)) {
> +		bank->db_clk = of_clk_get(dev->of_node, 1);
> +		if (IS_ERR(bank->db_clk)) {
> +			bank->db_clk = NULL;
> +		} else {
> +			clk_prepare_enable(bank->db_clk);

Ditto.

> +			bank->manual_dbclk_release = true;
> +		}
> +	}

...

>  	ret = rockchip_get_bank_data(bank);
>  	if (ret)
> -		return ret;
> +		goto err_disabled_clk;

No, just make sure it's properly wrapped by devm.

...

> +	bool				manual_clk_release;
> +	bool				manual_dbclk_release;

Why do you need them?

-- 
With Best Regards,
Andy Shevchenko