linux-kernel - Re: [PATCH 3/8] mfd: ti_am335x_tscadc: Remove use of single line functions

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Date:	Wed, 8 Jun 2016 16:35:08 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	"Andrew F. Davis" <afd@...com>
Cc:	Jonathan Cameron <jic23@...nel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Dave Gerlach <d-gerlach@...com>, linux-iio@...r.kernel.org,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/8] mfd: ti_am335x_tscadc: Remove use of single line
 functions

On Tue, 31 May 2016, Andrew F. Davis wrote:

> tscadc_readl and tscadc_writel are single line functions and do not save
> use anything, remove these.

Right.  I usually push back on these type of abstraction when they are
submitted.

Acked-by: Lee Jones <lee.jones@...aro.org>

> Signed-off-by: Andrew F. Davis <afd@...com>
> ---
>  drivers/mfd/ti_am335x_tscadc.c | 44 ++++++++++++++----------------------------
>  1 file changed, 15 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
> index 644128b..613f15d 100644
> --- a/drivers/mfd/ti_am335x_tscadc.c
> +++ b/drivers/mfd/ti_am335x_tscadc.c
> @@ -27,20 +27,6 @@
>  
>  #include <linux/mfd/ti_am335x_tscadc.h>
>  
> -static unsigned int tscadc_readl(struct ti_tscadc_dev *tsadc, unsigned int reg)
> -{
> -	unsigned int val;
> -
> -	regmap_read(tsadc->regmap_tscadc, reg, &val);
> -	return val;
> -}
> -
> -static void tscadc_writel(struct ti_tscadc_dev *tsadc, unsigned int reg,
> -					unsigned int val)
> -{
> -	regmap_write(tsadc->regmap_tscadc, reg, val);
> -}
> -
>  static const struct regmap_config tscadc_regmap_config = {
>  	.name = "ti_tscadc",
>  	.reg_bits = 32,
> @@ -57,7 +43,7 @@ void am335x_tsc_se_set_cache(struct ti_tscadc_dev *tsadc, u32 val)
>  	if (tsadc->adc_waiting)
>  		wake_up(&tsadc->reg_se_wait);
>  	else if (!tsadc->adc_in_use)
> -		tscadc_writel(tsadc, REG_SE, tsadc->reg_se_cache);
> +		regmap_write(tsadc->regmap_tscadc, REG_SE, tsadc->reg_se_cache);
>  
>  	spin_unlock_irqrestore(&tsadc->reg_lock, flags);
>  }
> @@ -68,7 +54,7 @@ static void am335x_tscadc_need_adc(struct ti_tscadc_dev *tsadc)
>  	DEFINE_WAIT(wait);
>  	u32 reg;
>  
> -	reg = tscadc_readl(tsadc, REG_ADCFSM);
> +	regmap_read(tsadc->regmap_tscadc, REG_ADCFSM, &reg);
>  	if (reg & SEQ_STATUS) {
>  		tsadc->adc_waiting = true;
>  		prepare_to_wait(&tsadc->reg_se_wait, &wait,
> @@ -84,7 +70,7 @@ static void am335x_tscadc_need_adc(struct ti_tscadc_dev *tsadc)
>  		 * Sequencer should either be idle or
>  		 * busy applying the charge step.
>  		 */
> -		reg = tscadc_readl(tsadc, REG_ADCFSM);
> +		regmap_read(tsadc->regmap_tscadc, REG_ADCFSM, &reg);
>  		WARN_ON((reg & SEQ_STATUS) && !(reg & CHARGE_STEP));
>  		tsadc->adc_waiting = false;
>  	}
> @@ -96,7 +82,7 @@ void am335x_tsc_se_set_once(struct ti_tscadc_dev *tsadc, u32 val)
>  	spin_lock_irq(&tsadc->reg_lock);
>  	am335x_tscadc_need_adc(tsadc);
>  
> -	tscadc_writel(tsadc, REG_SE, val);
> +	regmap_write(tsadc->regmap_tscadc, REG_SE, val);
>  	spin_unlock_irq(&tsadc->reg_lock);
>  }
>  EXPORT_SYMBOL_GPL(am335x_tsc_se_set_once);
> @@ -107,7 +93,7 @@ void am335x_tsc_se_adc_done(struct ti_tscadc_dev *tsadc)
>  
>  	spin_lock_irqsave(&tsadc->reg_lock, flags);
>  	tsadc->adc_in_use = false;
> -	tscadc_writel(tsadc, REG_SE, tsadc->reg_se_cache);
> +	regmap_write(tsadc->regmap_tscadc, REG_SE, tsadc->reg_se_cache);
>  	spin_unlock_irqrestore(&tsadc->reg_lock, flags);
>  }
>  EXPORT_SYMBOL_GPL(am335x_tsc_se_adc_done);
> @@ -118,7 +104,7 @@ void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val)
>  
>  	spin_lock_irqsave(&tsadc->reg_lock, flags);
>  	tsadc->reg_se_cache &= ~val;
> -	tscadc_writel(tsadc, REG_SE, tsadc->reg_se_cache);
> +	regmap_write(tsadc->regmap_tscadc, REG_SE, tsadc->reg_se_cache);
>  	spin_unlock_irqrestore(&tsadc->reg_lock, flags);
>  }
>  EXPORT_SYMBOL_GPL(am335x_tsc_se_clr);
> @@ -130,7 +116,7 @@ static void tscadc_idle_config(struct ti_tscadc_dev *config)
>  	idleconfig = STEPCONFIG_YNN | STEPCONFIG_INM_ADCREFM |
>  			STEPCONFIG_INP_ADCREFM | STEPCONFIG_YPN;
>  
> -	tscadc_writel(config, REG_IDLECONFIG, idleconfig);
> +	regmap_write(config->regmap_tscadc, REG_IDLECONFIG, idleconfig);
>  }
>  
>  static	int ti_tscadc_probe(struct platform_device *pdev)
> @@ -236,11 +222,11 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
>  
>  	/* TSCADC_CLKDIV needs to be configured to the value minus 1 */
>  	tscadc->clk_div--;
> -	tscadc_writel(tscadc, REG_CLKDIV, tscadc->clk_div);
> +	regmap_write(tscadc->regmap_tscadc, REG_CLKDIV, tscadc->clk_div);
>  
>  	/* Set the control register bits */
>  	ctrl = CNTRLREG_STEPCONFIGWRT |	CNTRLREG_STEPID;
> -	tscadc_writel(tscadc, REG_CTRL, ctrl);
> +	regmap_write(tscadc->regmap_tscadc, REG_CTRL, ctrl);
>  
>  	/* Set register bits for Idle Config Mode */
>  	if (tsc_wires > 0) {
> @@ -254,7 +240,7 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
>  
>  	/* Enable the TSC module enable bit */
>  	ctrl |= CNTRLREG_TSCSSENB;
> -	tscadc_writel(tscadc, REG_CTRL, ctrl);
> +	regmap_write(tscadc->regmap_tscadc, REG_CTRL, ctrl);
>  
>  	tscadc->used_cells = 0;
>  	tscadc->tsc_cell = -1;
> @@ -300,7 +286,7 @@ static int ti_tscadc_remove(struct platform_device *pdev)
>  {
>  	struct ti_tscadc_dev	*tscadc = platform_get_drvdata(pdev);
>  
> -	tscadc_writel(tscadc, REG_SE, 0x00);
> +	regmap_write(tscadc->regmap_tscadc, REG_SE, 0x00);
>  
>  	pm_runtime_put_sync(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
> @@ -314,7 +300,7 @@ static int __maybe_unused tscadc_suspend(struct device *dev)
>  {
>  	struct ti_tscadc_dev	*tscadc_dev = dev_get_drvdata(dev);
>  
> -	tscadc_writel(tscadc_dev, REG_SE, 0x00);
> +	regmap_write(tscadc_dev->regmap_tscadc, REG_SE, 0x00);
>  	pm_runtime_put_sync(dev);
>  
>  	return 0;
> @@ -329,7 +315,7 @@ static int __maybe_unused tscadc_resume(struct device *dev)
>  
>  	/* context restore */
>  	ctrl = CNTRLREG_STEPCONFIGWRT |	CNTRLREG_STEPID;
> -	tscadc_writel(tscadc_dev, REG_CTRL, ctrl);
> +	regmap_write(tscadc_dev->regmap_tscadc, REG_CTRL, ctrl);
>  
>  	if (tscadc_dev->tsc_cell != -1) {
>  		if (tscadc_dev->tsc_wires == 5)
> @@ -339,9 +325,9 @@ static int __maybe_unused tscadc_resume(struct device *dev)
>  		tscadc_idle_config(tscadc_dev);
>  	}
>  	ctrl |= CNTRLREG_TSCSSENB;
> -	tscadc_writel(tscadc_dev, REG_CTRL, ctrl);
> +	regmap_write(tscadc_dev->regmap_tscadc, REG_CTRL, ctrl);
>  
> -	tscadc_writel(tscadc_dev, REG_CLKDIV, tscadc_dev->clk_div);
> +	regmap_write(tscadc_dev->regmap_tscadc, REG_CLKDIV, tscadc_dev->clk_div);
>  
>  	return 0;
>  }

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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