linux-kernel - Re: [PATCH 4/4] gpio: Add decode of WM8994 GPIO configuration

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Date:	Mon, 2 Jan 2012 00:28:52 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Kukjin Kim <kgene.kim@...sung.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] gpio: Add decode of WM8994 GPIO configuration

On Thu, Dec 08, 2011 at 12:24:01AM +0800, Mark Brown wrote:
> For the human reader.
> 
> Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>

Applied, thanks.  Personally, I would have preferred a lookup table for
the _gpio_fn() stuff, but it isn't even close to a big enough complaint
for me to reject the patch.  :-)

g.

> ---
>  drivers/gpio/gpio-wm8994.c |   79 ++++++++++++++++++++++++++++++++++++++++++-
>  1 files changed, 77 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c
> index 96198f3..92ea535 100644
> --- a/drivers/gpio/gpio-wm8994.c
> +++ b/drivers/gpio/gpio-wm8994.c
> @@ -117,6 +117,60 @@ static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
>  
>  
>  #ifdef CONFIG_DEBUG_FS
> +static const char *wm8994_gpio_fn(u16 fn)
> +{
> +	switch (fn) {
> +	case WM8994_GP_FN_PIN_SPECIFIC:
> +		return "pin-specific";
> +	case WM8994_GP_FN_GPIO:
> +		return "GPIO";
> +	case WM8994_GP_FN_SDOUT:
> +		return "SDOUT";
> +	case WM8994_GP_FN_IRQ:
> +		return "IRQ";
> +	case WM8994_GP_FN_TEMPERATURE:
> +		return "Temperature";
> +	case WM8994_GP_FN_MICBIAS1_DET:
> +		return "MICBIAS1 detect";
> +	case WM8994_GP_FN_MICBIAS1_SHORT:
> +		return "MICBIAS1 short";
> +	case WM8994_GP_FN_MICBIAS2_DET:
> +		return "MICBIAS2 detect";
> +	case WM8994_GP_FN_MICBIAS2_SHORT:
> +		return "MICBIAS2 short";
> +	case WM8994_GP_FN_FLL1_LOCK:
> +		return "FLL1 lock";
> +	case WM8994_GP_FN_FLL2_LOCK:
> +		return "FLL2 lock";
> +	case WM8994_GP_FN_SRC1_LOCK:
> +		return "SRC1 lock";
> +	case WM8994_GP_FN_SRC2_LOCK:
> +		return "SRC2 lock";
> +	case WM8994_GP_FN_DRC1_ACT:
> +		return "DRC1 activity";
> +	case WM8994_GP_FN_DRC2_ACT:
> +		return "DRC2 activity";
> +	case WM8994_GP_FN_DRC3_ACT:
> +		return "DRC3 activity";
> +	case WM8994_GP_FN_WSEQ_STATUS:
> +		return "Write sequencer";
> +	case WM8994_GP_FN_FIFO_ERROR:
> +		return "FIFO error";
> +	case WM8994_GP_FN_OPCLK:
> +		return "OPCLK";
> +	case WM8994_GP_FN_THW:
> +		return "Thermal warning";
> +	case WM8994_GP_FN_DCS_DONE:
> +		return "DC servo";
> +	case WM8994_GP_FN_FLL1_OUT:
> +		return "FLL1 output";
> +	case WM8994_GP_FN_FLL2_OUT:
> +		return "FLL1 output";
> +	default:
> +		return "Unknown";
> +	}
> +}
> +
>  static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
>  {
>  	struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
> @@ -148,8 +202,29 @@ static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
>  			continue;
>  		}
>  
> -		/* No decode yet; note that GPIO2 is special */
> -		seq_printf(s, "(%x)\n", reg);
> +		if (reg & WM8994_GPN_DIR)
> +			seq_printf(s, "in ");
> +		else
> +			seq_printf(s, "out ");
> +
> +		if (reg & WM8994_GPN_PU)
> +			seq_printf(s, "pull up ");
> +
> +		if (reg & WM8994_GPN_PD)
> +			seq_printf(s, "pull down ");
> +
> +		if (reg & WM8994_GPN_POL)
> +			seq_printf(s, "inverted ");
> +		else
> +			seq_printf(s, "noninverted ");
> +
> +		if (reg & WM8994_GPN_OP_CFG)
> +			seq_printf(s, "open drain ");
> +		else
> +			seq_printf(s, "CMOS ");
> +
> +		seq_printf(s, "%s (%x)\n",
> +			   wm8994_gpio_fn(reg & WM8994_GPN_FN_MASK), reg);
>  	}
>  }
>  #else
> -- 
> 1.7.7.3
> 
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