Re: [PATCH v4.1 5/6] i2c: imx: Simplify using devm_clk_get_enableded()

From: Oleksij Rempel <o.rempel@pengutronix.de>
To: "Uwe Kleine-König" <uwe@kleine-koenig.org>
Cc: "Michael Turquette" <mturquette@baylibre.com>,
	"Stephen Boyd" <sboyd@kernel.org>,
	"Oleksij Rempel" <linux@rempel-privat.de>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	kernel@pengutronix.de,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Fabio Estevam" <festevam@gmail.com>,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-i2c@vger.kernel.org
Subject: Re: [PATCH v4.1 5/6] i2c: imx: Simplify using devm_clk_get_enableded()
Date: Tue, 6 Apr 2021 09:12:13 +0200	[thread overview]
Message-ID: <20210406071213.dxwucpggq6m7hfxi@pengutronix.de> (raw)
In-Reply-To: <20210406064618.24194-1-uwe@kleine-koenig.org>

On Tue, Apr 06, 2021 at 08:46:18AM +0200, Uwe Kleine-König wrote:
> From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> 
> devm_clk_get_enabled() returns the clk already (prepared and) enabled
> and the automatically called cleanup cares for disabling (and
> unpreparing). So simplify .probe() and .remove() accordingly.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Enthusiastically Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>

I hope devm_clk_get_enabled() will go mainline, it reduces dramatically
code and makes my life a lot better ;)

> ---
>  drivers/i2c/busses/i2c-imx.c | 12 ++----------
>  1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index b80fdc1f0092..d6594358cf83 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -1405,16 +1405,10 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  	ACPI_COMPANION_SET(&i2c_imx->adapter.dev, ACPI_COMPANION(&pdev->dev));
>  
>  	/* Get I2C clock */
> -	i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);
> +	i2c_imx->clk = devm_clk_get_enabled(&pdev->dev, NULL);
>  	if (IS_ERR(i2c_imx->clk))
>  		return dev_err_probe(&pdev->dev, PTR_ERR(i2c_imx->clk),
> -				     "can't get I2C clock\n");
> -
> -	ret = clk_prepare_enable(i2c_imx->clk);
> -	if (ret) {
> -		dev_err(&pdev->dev, "can't enable I2C clock, ret=%d\n", ret);
> -		return ret;
> -	}
> +				     "can't get prepared I2C clock\n");
>  
>  	/* Init queue */
>  	init_waitqueue_head(&i2c_imx->queue);
> @@ -1487,7 +1481,6 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  	pm_runtime_disable(&pdev->dev);
>  	pm_runtime_set_suspended(&pdev->dev);
>  	pm_runtime_dont_use_autosuspend(&pdev->dev);
> -	clk_disable_unprepare(i2c_imx->clk);
>  	return ret;
>  }
>  
> @@ -1517,7 +1510,6 @@ static int i2c_imx_remove(struct platform_device *pdev)
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq >= 0)
>  		free_irq(irq, i2c_imx);
> -	clk_disable_unprepare(i2c_imx->clk);
>  
>  	pm_runtime_put_noidle(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
> -- 
> 2.30.2
> 
> 
> 

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