linux-kernel - Re: [RFC/RFT PATCH 2/2] mfd: max14577: Allow driver to be built as a module

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Message-id: <56EA0F59.4090507@samsung.com>
Date:	Thu, 17 Mar 2016 10:58:49 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-kernel@...r.kernel.org
Cc:	Lee Jones <lee.jones@...aro.org>
Subject: Re: [RFC/RFT PATCH 2/2] mfd: max14577: Allow driver to be built as a
 module

On 2016년 03월 17일 01:48, Javier Martinez Canillas wrote:
> The driver's Kconfig symbol is a boolean but nothing prevents the driver
> to be built as a module instead of built-in. It is true that most system
> integrators will choose the latter but the config should not restrict it.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> 
>  drivers/mfd/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index eea61e349e26..be0ff820621b 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -514,8 +514,8 @@ config MFD_88PM860X
>  	  battery-charger under the corresponding menus.
>  
>  config MFD_MAX14577
> -	bool "Maxim Semiconductor MAX14577/77836 MUIC + Charger Support"
> -	depends on I2C=y
> +	tristate "Maxim Semiconductor MAX14577/77836 MUIC + Charger Support"
> +	depends on I2C
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> 

When I test the kernel build with these patch-set on next-20160316 tag,
the following errors happen. 

ERROR: "maxim_charger_calc_reg_current" [drivers/regulator/max14577.ko] undefined!
ERROR: "maxim_charger_currents" [drivers/regulator/max14577.ko] undefined!
ERROR: "maxim_charger_currents" [drivers/power/max14577_charger.ko] undefined!
ERROR: "maxim_charger_calc_reg_current" [drivers/power/max14577_charger.ko] undefined!

Best Regards,
Chanwoo Choi