linux-kernel - Re: [PATCH 6/8] extcon: arizona: Add support for WM8998 and WM1814

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Date:	Wed, 22 Apr 2015 14:53:42 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
Cc:	lee.jones@...aro.org, broonie@...nel.org, linus.walleij@...aro.org,
	gnurou@...il.com, myungjoo.ham@...sung.com,
	ckeepax@...nsource.wolfsonmicro.com,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org, alsa-devel@...a-project.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 6/8] extcon: arizona: Add support for WM8998 and WM1814

Hi Richard,

On 04/21/2015 09:33 PM, Richard Fitzgerald wrote:
> Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
> ---
>  drivers/extcon/extcon-arizona.c |   33 ++++++++++++++++++++++-----------
>  1 files changed, 22 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index a0ed35b..0e60787 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -1,7 +1,7 @@
>  /*
>   * extcon-arizona.c - Extcon driver Wolfson Arizona devices
>   *
> - *  Copyright (C) 2012 Wolfson Microelectronics plc
> + *  Copyright (C) 2012-2014 Wolfson Microelectronics plc
>   *
>   * This program is free software; you can redistribute it and/or modify
>   * it under the terms of the GNU General Public License as published by
> @@ -140,10 +140,14 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
>  				    bool clamp)
>  {
>  	struct arizona *arizona = info->arizona;
> -	unsigned int mask = 0, val = 0;
> +	unsigned int mask, val = 0;
>  	int ret;
>  
>  	switch (arizona->type) {
> +	case WM8998:
> +	case WM1814:
> +		mask = 0;
> +		break;
>  	case WM5110:
>  		mask = ARIZONA_HP1L_SHRTO | ARIZONA_HP1L_FLWR |
>  		       ARIZONA_HP1L_SHRTI;
> @@ -175,17 +179,19 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
>  				 ret);
>  	}
>  
> -	ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1L,
> -				 mask, val);
> -	if (ret != 0)
> -		dev_warn(arizona->dev, "Failed to do clamp: %d\n",
> +	if (mask) {
> +		ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1L,
> +					 mask, val);
> +		if (ret != 0)
> +			dev_warn(arizona->dev, "Failed to do clamp: %d\n",
>  				 ret);
>  
> -	ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1R,
> -				 mask, val);
> -	if (ret != 0)
> -		dev_warn(arizona->dev, "Failed to do clamp: %d\n",
> -			 ret);
> +		ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1R,
> +					 mask, val);
> +		if (ret != 0)
> +			dev_warn(arizona->dev, "Failed to do clamp: %d\n",
> +				 ret);
> +	}
>  
>  	/* Restore the desired state while not doing the clamp */
>  	if (!clamp) {
> @@ -1176,6 +1182,11 @@ static int arizona_extcon_probe(struct platform_device *pdev)
>  			break;
>  		}
>  		break;
> +	case WM8998:
> +	case WM1814:
> +		info->micd_clamp = true;
> +		info->hpdet_ip = 2;

What is meaning of '2'? I prefer to use the definition for '2'.

Except for upper one comment, looks good to me.

Thanks,
Chanwoo Choi
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