Re: [PATCH -next v2 02/25] spi: armada-3700: Use helper function devm_clk_get_prepared()

[Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>]

On Wed, 23 Aug 2023 21:39:15 +0800
Li Zetao <lizetao1@xxxxxxxxxx> wrote:

> Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared
> and enabled clocks"), devm_clk_get() and clk_prepare() can now be replaced
> by devm_clk_get_prepared() when driver prepares the clocks for the whole
> lifetime of the device. Moreover, it is no longer necessary to unprepare
> the clocks explicitly.
> 
> Signed-off-by: Li Zetao <lizetao1@xxxxxxxxxx>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

> ---
> v1 -> v2: Drop the empty remove function a3700_spi_remove().
> 
>  drivers/spi/spi-armada-3700.c | 23 +++--------------------
>  1 file changed, 3 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c
> index 0103ac0158c0..3c9ed412932f 100644
> --- a/drivers/spi/spi-armada-3700.c
> +++ b/drivers/spi/spi-armada-3700.c
> @@ -865,18 +865,12 @@ static int a3700_spi_probe(struct platform_device *pdev)
>  
>  	init_completion(&spi->done);
>  
> -	spi->clk = devm_clk_get(dev, NULL);
> +	spi->clk = devm_clk_get_prepared(dev, NULL);
>  	if (IS_ERR(spi->clk)) {
>  		dev_err(dev, "could not find clk: %ld\n", PTR_ERR(spi->clk));
>  		goto error;
>  	}
>  
> -	ret = clk_prepare(spi->clk);
> -	if (ret) {
> -		dev_err(dev, "could not prepare clk: %d\n", ret);
> -		goto error;
> -	}
> -
>  	host->max_speed_hz = min_t(unsigned long, A3700_SPI_MAX_SPEED_HZ,
>  					clk_get_rate(spi->clk));
>  	host->min_speed_hz = DIV_ROUND_UP(clk_get_rate(spi->clk),
> @@ -888,40 +882,29 @@ static int a3700_spi_probe(struct platform_device *pdev)
>  			       dev_name(dev), host);
>  	if (ret) {
>  		dev_err(dev, "could not request IRQ: %d\n", ret);
> -		goto error_clk;
> +		goto error;
>  	}
>  
>  	ret = devm_spi_register_controller(dev, host);
>  	if (ret) {
>  		dev_err(dev, "Failed to register host\n");
> -		goto error_clk;
> +		goto error;
>  	}
>  
>  	return 0;
>  
> -error_clk:
> -	clk_unprepare(spi->clk);
>  error:
>  	spi_controller_put(host);
>  out:
>  	return ret;
>  }
>  
> -static void a3700_spi_remove(struct platform_device *pdev)
> -{
> -	struct spi_controller *host = platform_get_drvdata(pdev);
> -	struct a3700_spi *spi = spi_controller_get_devdata(host);
> -
> -	clk_unprepare(spi->clk);
> -}
> -
>  static struct platform_driver a3700_spi_driver = {
>  	.driver = {
>  		.name	= DRIVER_NAME,
>  		.of_match_table = of_match_ptr(a3700_spi_dt_ids),
>  	},
>  	.probe		= a3700_spi_probe,
> -	.remove_new	= a3700_spi_remove,
>  };
>  
>  module_platform_driver(a3700_spi_driver);