linux-kernel - Re: [PATCH v2 1/1] serial: 8250_bcm7271: Use devm_clk_get_optional

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Message-ID: <ZR7UCtRKrycMD5d5@ashyti-mobl2.lan>
Date:   Thu, 5 Oct 2023 17:19:38 +0200
From:   Andi Shyti <andi.shyti@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Al Cooper <alcooperx@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Andi Shyti <andi.shyti@...ux.intel.com>
Subject: Re: [PATCH v2 1/1] serial: 8250_bcm7271: Use
 devm_clk_get_optional_enabled()

Hi Andy,

[...]

> -	baud_mux_clk = devm_clk_get(dev, "sw_baud");
> -	if (IS_ERR(baud_mux_clk)) {
> -		if (PTR_ERR(baud_mux_clk) == -EPROBE_DEFER) {
> -			ret = -EPROBE_DEFER;
> -			goto release_dma;
> -		}
> -		dev_dbg(dev, "BAUD MUX clock not specified\n");
> -	} else {
> +	baud_mux_clk = devm_clk_get_optional_enabled(dev, "sw_baud");
> +	ret = PTR_ERR_OR_ZERO(baud_mux_clk);
> +	if (ret)
> +		goto release_dma;
> +	if (baud_mux_clk) {
>  		dev_dbg(dev, "BAUD MUX clock found\n");
> -		ret = clk_prepare_enable(baud_mux_clk);
> -		if (ret)
> -			goto release_dma;
> +
>  		priv->baud_mux_clk = baud_mux_clk;
>  		init_real_clk_rates(dev, priv);
>  		clk_rate = priv->default_mux_rate;
> +	} else {
> +		dev_dbg(dev, "BAUD MUX clock not specified\n");

little behavioral change here, but I don't think this is a
problem.

Reviewed-by: Andi Shyti <andi.shyti@...ux.intel.com> 

Thanks,
Andi