linux-kernel - Re: [PATCH v1 02/24] drivers: crypto: meson: make CLK controller optional

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Date: Thu, 11 Jan 2024 09:20:53 +0100
From: neil.armstrong@...aro.org
To: Alexey Romanov <avromanov@...utedevices.com>, narmstrong@...libre.com,
 clabbe@...libre.com, herbert@...dor.apana.org.au, davem@...emloft.net,
 robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 khilman@...libre.com, jbrunet@...libre.com, artin.blumenstingl@...glemail.com
Cc: linux-crypto@...r.kernel.org, linux-amlogic@...ts.infradead.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, kernel@...utedevices.com,
 Jan Dakinevich <yvdakinevich@...utedevices.com>
Subject: Re: [PATCH v1 02/24] drivers: crypto: meson: make CLK controller
 optional

On 10/01/2024 21:11, Alexey Romanov wrote:
> Not all Amlogic SoC's uses CLK controller.

In this case you must make clocks not required for the new platforms in the bindings.

Neil

> 
> Signed-off-by: Alexey Romanov <avromanov@...utedevices.com>
> Signed-off-by: Jan Dakinevich <yvdakinevich@...utedevices.com>
> ---
>   drivers/crypto/amlogic/amlogic-gxl-core.c | 12 ++----------
>   1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index a5df061f9890..e5f504fb477e 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -248,16 +248,10 @@ static int meson_crypto_probe(struct platform_device *pdev)
>   		dev_err(&pdev->dev, "Cannot request MMIO err=%d\n", err);
>   		return err;
>   	}
> -	mc->busclk = devm_clk_get(&pdev->dev, "blkmv");
> +	mc->busclk = devm_clk_get_optional_enabled(&pdev->dev, "blkmv");
>   	if (IS_ERR(mc->busclk)) {
>   		err = PTR_ERR(mc->busclk);
> -		dev_err(&pdev->dev, "Cannot get core clock err=%d\n", err);
> -		return err;
> -	}
> -
> -	err = clk_prepare_enable(mc->busclk);
> -	if (err != 0) {
> -		dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
> +		dev_err(&pdev->dev, "Cannot get and enable core clock err=%d\n", err);
>   		return err;
>   	}
>   
> @@ -279,7 +273,6 @@ static int meson_crypto_probe(struct platform_device *pdev)
>   	meson_unregister_algs(mc);
>   error_flow:
>   	meson_free_chanlist(mc, mc->flow_cnt - 1);
> -	clk_disable_unprepare(mc->busclk);
>   	return err;
>   }
>   
> @@ -295,7 +288,6 @@ static int meson_crypto_remove(struct platform_device *pdev)
>   
>   	meson_free_chanlist(mc, mc->flow_cnt - 1);
>   
> -	clk_disable_unprepare(mc->busclk);
>   	return 0;
>   }
>