linux-kernel - Re: [PATCH v2 2/7] hwrng: exynos: Improve coding style

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Date: Thu, 20 Jun 2024 10:52:38 +0200
From: Lukasz Stelmach <l.stelmach@...sung.com>
To: Sam Protsenko <semen.protsenko@...aro.org>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>,  Rob Herring
	<robh@...nel.org>,  Conor Dooley <conor+dt@...nel.org>,  Anand Moon
	<linux.amoon@...il.com>,  Olivia Mackall <olivia@...enic.com>,  Herbert Xu
	<herbert@...dor.apana.org.au>,  Alim Akhtar <alim.akhtar@...sung.com>,
	linux-samsung-soc@...r.kernel.org,  linux-crypto@...r.kernel.org,
	devicetree@...r.kernel.org,  linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] hwrng: exynos: Improve coding style

It was <2024-06-18 wto 15:45>, when Sam Protsenko wrote:
> Fix obvious style issues. Some of those were found with checkpatch, and
> some just contradict the kernel coding style guide.
>
> No functional change.
>
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
> Changes in v2:
>   - Added Krzysztof's R-b tag
>
>  drivers/char/hw_random/exynos-trng.c | 61 +++++++++++++---------------
>  1 file changed, 29 insertions(+), 32 deletions(-)
>

Acked-by: Łukasz Stelmach <l.stelmach@...sung.com>

> diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
> index 0ed5d22fe667..88a5088ed34d 100644
> --- a/drivers/char/hw_random/exynos-trng.c
> +++ b/drivers/char/hw_random/exynos-trng.c
> @@ -23,45 +23,41 @@
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  
> -#define EXYNOS_TRNG_CLKDIV         (0x0)
> -
> -#define EXYNOS_TRNG_CTRL           (0x20)
> -#define EXYNOS_TRNG_CTRL_RNGEN     BIT(31)
> -
> -#define EXYNOS_TRNG_POST_CTRL      (0x30)
> -#define EXYNOS_TRNG_ONLINE_CTRL    (0x40)
> -#define EXYNOS_TRNG_ONLINE_STAT    (0x44)
> -#define EXYNOS_TRNG_ONLINE_MAXCHI2 (0x48)
> -#define EXYNOS_TRNG_FIFO_CTRL      (0x50)
> -#define EXYNOS_TRNG_FIFO_0         (0x80)
> -#define EXYNOS_TRNG_FIFO_1         (0x84)
> -#define EXYNOS_TRNG_FIFO_2         (0x88)
> -#define EXYNOS_TRNG_FIFO_3         (0x8c)
> -#define EXYNOS_TRNG_FIFO_4         (0x90)
> -#define EXYNOS_TRNG_FIFO_5         (0x94)
> -#define EXYNOS_TRNG_FIFO_6         (0x98)
> -#define EXYNOS_TRNG_FIFO_7         (0x9c)
> -#define EXYNOS_TRNG_FIFO_LEN       (8)
> -#define EXYNOS_TRNG_CLOCK_RATE     (500000)
> -
> +#define EXYNOS_TRNG_CLKDIV		0x0
> +
> +#define EXYNOS_TRNG_CTRL		0x20
> +#define EXYNOS_TRNG_CTRL_RNGEN		BIT(31)
> +
> +#define EXYNOS_TRNG_POST_CTRL		0x30
> +#define EXYNOS_TRNG_ONLINE_CTRL		0x40
> +#define EXYNOS_TRNG_ONLINE_STAT		0x44
> +#define EXYNOS_TRNG_ONLINE_MAXCHI2	0x48
> +#define EXYNOS_TRNG_FIFO_CTRL		0x50
> +#define EXYNOS_TRNG_FIFO_0		0x80
> +#define EXYNOS_TRNG_FIFO_1		0x84
> +#define EXYNOS_TRNG_FIFO_2		0x88
> +#define EXYNOS_TRNG_FIFO_3		0x8c
> +#define EXYNOS_TRNG_FIFO_4		0x90
> +#define EXYNOS_TRNG_FIFO_5		0x94
> +#define EXYNOS_TRNG_FIFO_6		0x98
> +#define EXYNOS_TRNG_FIFO_7		0x9c
> +#define EXYNOS_TRNG_FIFO_LEN		8
> +#define EXYNOS_TRNG_CLOCK_RATE		500000
>  
>  struct exynos_trng_dev {
> -	struct device    *dev;
> -	void __iomem     *mem;
> -	struct clk       *clk;
> -	struct hwrng rng;
> +	struct device	*dev;
> +	void __iomem	*mem;
> +	struct clk	*clk;
> +	struct hwrng	rng;
>  };
>  
>  static int exynos_trng_do_read(struct hwrng *rng, void *data, size_t max,
>  			       bool wait)
>  {
> -	struct exynos_trng_dev *trng;
> +	struct exynos_trng_dev *trng = (struct exynos_trng_dev *)rng->priv;
>  	int val;
>  
>  	max = min_t(size_t, max, (EXYNOS_TRNG_FIFO_LEN * 4));
> -
> -	trng = (struct exynos_trng_dev *)rng->priv;
> -
>  	writel_relaxed(max * 8, trng->mem + EXYNOS_TRNG_FIFO_CTRL);
>  	val = readl_poll_timeout(trng->mem + EXYNOS_TRNG_FIFO_CTRL, val,
>  				 val == 0, 200, 1000000);
> @@ -122,7 +118,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
>  
>  	trng->rng.init = exynos_trng_init;
>  	trng->rng.read = exynos_trng_do_read;
> -	trng->rng.priv = (unsigned long) trng;
> +	trng->rng.priv = (unsigned long)trng;
>  
>  	platform_set_drvdata(pdev, trng);
>  	trng->dev = &pdev->dev;
> @@ -175,7 +171,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
>  
>  static void exynos_trng_remove(struct platform_device *pdev)
>  {
> -	struct exynos_trng_dev *trng =  platform_get_drvdata(pdev);
> +	struct exynos_trng_dev *trng = platform_get_drvdata(pdev);
>  
>  	clk_disable_unprepare(trng->clk);
>  
> @@ -204,7 +200,7 @@ static int exynos_trng_resume(struct device *dev)
>  }
>  
>  static DEFINE_SIMPLE_DEV_PM_OPS(exynos_trng_pm_ops, exynos_trng_suspend,
> -			 exynos_trng_resume);
> +				exynos_trng_resume);
>  
>  static const struct of_device_id exynos_trng_dt_match[] = {
>  	{
> @@ -225,6 +221,7 @@ static struct platform_driver exynos_trng_driver = {
>  };
>  
>  module_platform_driver(exynos_trng_driver);
> +
>  MODULE_AUTHOR("Łukasz Stelmach");
>  MODULE_DESCRIPTION("H/W TRNG driver for Exynos chips");
>  MODULE_LICENSE("GPL v2");

-- 
Łukasz Stelmach
Samsung R&D Institute Poland
Samsung Electronics

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