linux-kernel - Re: [PATCH 05/11] clk: imx: refine the powerup_set bit of clk-pllv3

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Message-ID: <20160612113627.GC20243@tiger>
Date:	Sun, 12 Jun 2016 19:36:27 +0800
From:	Shawn Guo <shawnguo@...nel.org>
To:	Dong Aisheng <aisheng.dong@....com>
Cc:	linux-clk@...r.kernel.org, anson.huang@....com,
	mturquette@...libre.com, sboyd@...eaurora.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 05/11] clk: imx: refine the powerup_set bit of clk-pllv3

On Wed, Jun 08, 2016 at 10:33:34PM +0800, Dong Aisheng wrote:
> There's a powerdown bit already, so let's change the name of
> powerup_set bit to power_invert to reflects the power polarity
> to make it less confusing.
> 
> Signed-off-by: Dong Aisheng <aisheng.dong@....com>
> ---
>  drivers/clk/imx/clk-pllv3.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c
> index eea2b1b3791e..3fdfb6d2cc71 100644
> --- a/drivers/clk/imx/clk-pllv3.c
> +++ b/drivers/clk/imx/clk-pllv3.c
> @@ -29,8 +29,8 @@
>   * struct clk_pllv3 - IMX PLL clock version 3
>   * @clk_hw:	 clock source
>   * @base:	 base address of PLL registers
> - * @powerup_set: set POWER bit to power up the PLL
> - * @powerdown:   pll powerdown offset bit
> + * @powerdown:	 pll powerdown bit offset

I think 'powerdown' is more confusing here.  I prefer to rename it to
something like 'power_mask' and keep 'powerdown' as it is.

Shawn

> + * @power_invert: set powerdown bit to power up the PLL
>   * @div_mask:	 mask of divider bits
>   * @div_shift:	 shift of divider bits
>   *
> @@ -40,7 +40,7 @@
>  struct clk_pllv3 {
>  	struct clk_hw	hw;
>  	void __iomem	*base;
> -	bool		powerup_set;
> +	bool		power_invert;
>  	u32		powerdown;
>  	u32		div_mask;
>  	u32		div_shift;
> @@ -55,7 +55,7 @@ static int clk_pllv3_wait_lock(struct clk_pllv3 *pll)
>  	u32 val = readl_relaxed(pll->base) & pll->powerdown;
>  
>  	/* No need to wait for lock when pll is not powered up */
> -	if ((pll->powerup_set && !val) || (!pll->powerup_set && val))
> +	if ((pll->power_invert && !val) || (!pll->power_invert && val))
>  		return 0;
>  
>  	/* Wait for PLL to lock */
> @@ -76,7 +76,7 @@ static int clk_pllv3_prepare(struct clk_hw *hw)
>  	u32 val;
>  
>  	val = readl_relaxed(pll->base);
> -	if (pll->powerup_set)
> +	if (pll->power_invert)
>  		val |= pll->powerdown;
>  	else
>  		val &= ~pll->powerdown;
> @@ -91,7 +91,7 @@ static void clk_pllv3_unprepare(struct clk_hw *hw)
>  	u32 val;
>  
>  	val = readl_relaxed(pll->base);
> -	if (pll->powerup_set)
> +	if (pll->power_invert)
>  		val &= ~pll->powerdown;
>  	else
>  		val |= pll->powerdown;
> @@ -326,7 +326,7 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
>  		pll->div_shift = 1;
>  	case IMX_PLLV3_USB:
>  		ops = &clk_pllv3_ops;
> -		pll->powerup_set = true;
> +		pll->power_invert = true;
>  		break;
>  	case IMX_PLLV3_AV:
>  		ops = &clk_pllv3_av_ops;
> -- 
> 1.9.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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