Re: [PATCH v2] crypto/amlogic: Use devm APIs for clock management

[Mohamad Raizudeen <raizudeen.kerneldev@gmail.com>]

On Tue, Sep 01, 2026 at 08:12:52AM +0530, Mohamad Raizudeen wrote:
> The driver currently gets the core clock and manually enables it using
> clk_prepare_enable(). This requires matching calls to
> clk_disable_unprepare() in the error paths and remove function.
> 
> Switch to devm_clk_get_enabled() instead. This lets the kernel handle
> enabling and disabling the clock automatically, which allow us to drop
> the manual cleanup code and keeps the probe function simple.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202608310329.QgxCCMs1-lkp@intel.com/
> Signed-off-by: Mohamad Raizudeen <raizudeen.kerneldev@gmail.com>
> ---
> Changes in v2:
> - Dropped the devm_crypto_engine_alloc_init() change due to build
>   failure reported by the kernel test robot.
> - Kept the devm_clk_get_enabled() clock cleanup as the sole focus of
>   this patch.
> - Link to v1: https://lore.kernel.org/linux-crypto/20260821151303.8150-1-raizudeen.kerneldev@gmail.com/T/#u
> 
>  drivers/crypto/amlogic/amlogic-gxl-core.c | 16 +++-------------
>  1 file changed, 3 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index 169c6eeb51e5..6f4c62ddaf89 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -243,10 +243,10 @@ static int meson_crypto_probe(struct platform_device *pdev)
>  	if (IS_ERR(mc->base))
>  		return PTR_ERR(mc->base);
>  
> -	mc->busclk = devm_clk_get(&pdev->dev, "blkmv");
> +	mc->busclk = devm_clk_get_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);
> +		dev_err(&pdev->dev, "Cannot get/enable core clock err=%d\n", err);
>  		return err;
>  	}
>  
> @@ -261,15 +261,9 @@ static int meson_crypto_probe(struct platform_device *pdev)
>  			return err;
>  	}
>  
> -	err = clk_prepare_enable(mc->busclk);
> -	if (err != 0) {
> -		dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
> -		return err;
> -	}
> -
>  	err = meson_allocate_chanlist(mc);
>  	if (err)
> -		goto error_flow;
> +		return err;
>  
>  	err = meson_register_algs(mc);
>  	if (err)
> @@ -290,8 +284,6 @@ static int meson_crypto_probe(struct platform_device *pdev)
>  error_alg:
>  	meson_unregister_algs(mc);
>  	meson_free_chanlist(mc, MAXFLOW - 1);
> -error_flow:
> -	clk_disable_unprepare(mc->busclk);
>  	return err;
>  }
>  
> @@ -306,8 +298,6 @@ static void meson_crypto_remove(struct platform_device *pdev)
>  	meson_unregister_algs(mc);
>  
>  	meson_free_chanlist(mc, MAXFLOW - 1);
> -
> -	clk_disable_unprepare(mc->busclk);
>  }
>  
>  static const struct of_device_id meson_crypto_of_match_table[] = {
> -- 
> 2.53.0
>
Hi, 

Just following up on this patch. Please let me know if you have any
feedback or if further changes are needed.

Thanks,
Mohamad Raizudeen