linux-kernel - Re: [PATCH] mfd: max77686: make interrupts support optional

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Date:	Wed, 20 Aug 2014 09:19:09 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Marek Szyprowski <m.szyprowski@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Daniel Drake <drake@...lessm.com>,
	Tobias Jakobi <Liquid.Acid@....net>,
	Olof Johansson <olof@...om.net>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Subject: Re: [PATCH] mfd: max77686: make interrupts support optional

On Wed, 20 Aug 2014, Marek Szyprowski wrote:

> Commit 6f1c1e71d93 ("mfd: max77686: Convert to use regmap_irq") broke
> support for boards, which provide no irq for MAX 77686 PMIC. In such
> case, not all functions of PMIC are available, but the driver still
> should at least handle voltage regulators instead of failing to init.
> This patch restores previous behavior.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
> Hello,
> 
> This patch fixes booting issues with recently merged support for
> Exynos4412 based Odroid X2/U3 boards. See
> http://www.spinics.net/lists/linux-samsung-soc/msg35773.html
> thread for more details.
> 
> Best regards
> Marek Szyprowski
> Samsung R&D Institute Poland
> ---
>  drivers/mfd/max77686.c | 46 +++++++++++++++++++++++++++-------------------
>  1 file changed, 27 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> index 86e552348db4..525718c448c8 100644
> --- a/drivers/mfd/max77686.c
> +++ b/drivers/mfd/max77686.c

[...]

> @@ -357,8 +363,10 @@ static int max77686_i2c_remove(struct i2c_client *i2c)
>  
>  	mfd_remove_devices(max77686->dev);
>  
> -	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
> -	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
> +	if (max77686->irq)
> +		regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
> +	if (max77686->irq)
> +		regmap_del_irq_chip(max77686->irq, max77686->irq_data);

Looks like you rushed this patch and went a bit crazy with
copy-paste. :)

Please put these two regmap_del_irq_chip()'s as results of the same
conditional i.e:

  if (max77686->irq) {
	  regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
	  regmap_del_irq_chip(max77686->irq, max77686->irq_data);
  }

>  
>  	if (max77686->type == TYPE_MAX77686)
>  		i2c_unregister_device(max77686->rtc);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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