linux-kernel - Re: [PATCH 1/2] rtc: max77686: convert to devm_i2c_new_dummy

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Date:   Thu, 29 Aug 2019 22:57:52 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     linux-i2c@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH 1/2] rtc: max77686: convert to devm_i2c_new_dummy_device()

On 20/08/2019 17:42:37+0200, Wolfram Sang wrote:
> I was about to simplify the call to i2c_unregister_device() when I
> realized that converting to devm_i2c_new_dummy_device() will simplify
> the driver a lot. So I took this approach.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
> Build tested only, buildbot is happy, too.
> 
> Please apply to your tree.
> 

I'm confused because I already applied:
https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git/commit/?h=rtc-next&id=7150710f3084de8d35ce3221eeae2caee8813f92

>  drivers/rtc/rtc-max77686.c | 17 ++++-------------
>  1 file changed, 4 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
> index d04fd1024697..4027b33034dc 100644
> --- a/drivers/rtc/rtc-max77686.c
> +++ b/drivers/rtc/rtc-max77686.c
> @@ -693,8 +693,8 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
>  		goto add_rtc_irq;
>  	}
>  
> -	info->rtc = i2c_new_dummy_device(parent_i2c->adapter,
> -				  info->drv_data->rtc_i2c_addr);
> +	info->rtc = devm_i2c_new_dummy_device(info->dev, parent_i2c->adapter,
> +					      info->drv_data->rtc_i2c_addr);
>  	if (IS_ERR(info->rtc)) {
>  		dev_err(info->dev, "Failed to allocate I2C device for RTC\n");
>  		return PTR_ERR(info->rtc);
> @@ -705,7 +705,7 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
>  	if (IS_ERR(info->rtc_regmap)) {
>  		ret = PTR_ERR(info->rtc_regmap);
>  		dev_err(info->dev, "Failed to allocate RTC regmap: %d\n", ret);
> -		goto err_unregister_i2c;
> +		return ret;
>  	}
>  
>  add_rtc_irq:
> @@ -715,15 +715,10 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
>  				  &info->rtc_irq_data);
>  	if (ret < 0) {
>  		dev_err(info->dev, "Failed to add RTC irq chip: %d\n", ret);
> -		goto err_unregister_i2c;
> +		return ret;
>  	}
>  
>  	return 0;
> -
> -err_unregister_i2c:
> -	if (info->rtc)
> -		i2c_unregister_device(info->rtc);
> -	return ret;
>  }
>  
>  static int max77686_rtc_probe(struct platform_device *pdev)
> @@ -786,8 +781,6 @@ static int max77686_rtc_probe(struct platform_device *pdev)
>  
>  err_rtc:
>  	regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
> -	if (info->rtc)
> -		i2c_unregister_device(info->rtc);
>  
>  	return ret;
>  }
> @@ -798,8 +791,6 @@ static int max77686_rtc_remove(struct platform_device *pdev)
>  
>  	free_irq(info->virq, info);
>  	regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
> -	if (info->rtc)
> -		i2c_unregister_device(info->rtc);
>  
>  	return 0;
>  }
> -- 
> 2.20.1
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com