linux-kernel - Re: [PATCH] phy: exynos-mipi-video: Simplify code by using regmap_update

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Date:   Mon, 23 Apr 2018 12:13:26 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
CC:     <krzk@...nel.org>, <linux-samsung-soc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <m.szyprowski@...sung.com>,
        <b.zolnierkie@...sung.com>
Subject: Re: [PATCH] phy: exynos-mipi-video: Simplify code by using
 regmap_update_bits()



On Monday 16 April 2018 09:49 PM, Sylwester Nawrocki wrote:
> There is no functional change, just replacing regmap_read()/modify/
> regmap_write() with regmap_update_bits() function calls.

merged, thanks!

-Kishon

> 
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> ---
>  drivers/phy/samsung/phy-exynos-mipi-video.c | 34 ++++++++++++-----------------
>  1 file changed, 14 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/phy/samsung/phy-exynos-mipi-video.c b/drivers/phy/samsung/phy-exynos-mipi-video.c
> index c198886f80a3..00d89599c67d 100644
> --- a/drivers/phy/samsung/phy-exynos-mipi-video.c
> +++ b/drivers/phy/samsung/phy-exynos-mipi-video.c
> @@ -231,33 +231,27 @@ struct exynos_mipi_video_phy {
>  static int __set_phy_state(const struct exynos_mipi_phy_desc *data,
>  			   struct exynos_mipi_video_phy *state, unsigned int on)
>  {
> -	u32 val;
> +	struct regmap *enable_map = state->regmaps[data->enable_map];
> +	struct regmap *resetn_map = state->regmaps[data->resetn_map];
>  
>  	spin_lock(&state->slock);
>  
>  	/* disable in PMU sysreg */
>  	if (!on && data->coupled_phy_id >= 0 &&
> -	    state->phys[data->coupled_phy_id].phy->power_count == 0) {
> -		regmap_read(state->regmaps[data->enable_map], data->enable_reg,
> -			    &val);
> -		val &= ~data->enable_val;
> -		regmap_write(state->regmaps[data->enable_map], data->enable_reg,
> -			     val);
> -	}
> -
> +	    state->phys[data->coupled_phy_id].phy->power_count == 0)
> +		regmap_update_bits(enable_map, data->enable_reg,
> +				   data->enable_val, 0);
>  	/* PHY reset */
> -	regmap_read(state->regmaps[data->resetn_map], data->resetn_reg, &val);
> -	val = on ? (val | data->resetn_val) : (val & ~data->resetn_val);
> -	regmap_write(state->regmaps[data->resetn_map], data->resetn_reg, val);
> -
> +	if (on)
> +		regmap_update_bits(resetn_map, data->resetn_reg,
> +				   data->resetn_val, data->resetn_val);
> +	else
> +		regmap_update_bits(resetn_map, data->resetn_reg,
> +				   data->resetn_val, 0);
>  	/* enable in PMU sysreg */
> -	if (on) {
> -		regmap_read(state->regmaps[data->enable_map], data->enable_reg,
> -			    &val);
> -		val |= data->enable_val;
> -		regmap_write(state->regmaps[data->enable_map], data->enable_reg,
> -			     val);
> -	}
> +	if (on)
> +		regmap_update_bits(enable_map, data->enable_reg,
> +				   data->enable_val, data->enable_val);
>  
>  	spin_unlock(&state->slock);
>  
>