> Hi Geert
> 
> Thanks for your report. I already sent a patch[1] to fix this build break
> and I'll send pull request to includec this patch in 3.17-rc2.
> 
> [1] https://lkml.org/lkml/2014/8/13/761
> 
> Best Regards,
> Chanwoo Choi

I do not object to this patch or your patch[1].

However, wouldn't it be better to add depends on I2C at REGMAP_I2C?
When you use REGMAP_I2C, you assume that I2C is already there, don't you?


Cheers,
MyungJoo

> 
> 
> On 08/17/2014 07:08 PM, Geert Uytterhoeven wrote:
> > EXTCON_SM5502 selects REGMAP_I2C, but if I2C=n:
> > 
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_smbus_byte_reg_read¡¯:
> > drivers/base/regmap/regmap-i2c.c:28: error: implicit declaration of function ¡®i2c_smbus_read_byte_data¡¯
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_smbus_byte_reg_write¡¯:
> > drivers/base/regmap/regmap-i2c.c:46: error: implicit declaration of function ¡®i2c_smbus_write_byte_data¡¯
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_smbus_word_reg_read¡¯:
> > drivers/base/regmap/regmap-i2c.c:64: error: implicit declaration of function ¡®i2c_smbus_read_word_data¡¯
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_smbus_word_reg_write¡¯:
> > drivers/base/regmap/regmap-i2c.c:82: error: implicit declaration of function ¡®i2c_smbus_write_word_data¡¯
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_i2c_write¡¯:
> > drivers/base/regmap/regmap-i2c.c:96: error: implicit declaration of function ¡®i2c_master_send¡¯
> > drivers/base/regmap/regmap-i2c.c: In function ¡®regmap_i2c_gather_write¡¯:
> > drivers/base/regmap/regmap-i2c.c:117: error: implicit declaration of function ¡®i2c_check_functionality¡¯
> > drivers/base/regmap/regmap-i2c.c:130: error: implicit declaration of function ¡®i2c_transfer¡¯
> > 
> > Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> > ---
> >  drivers/extcon/Kconfig | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
> > index 6f2f4727de2c..764f3a113e0a 100644
> > --- a/drivers/extcon/Kconfig
> > +++ b/drivers/extcon/Kconfig
> > @@ -72,6 +72,7 @@ config EXTCON_PALMAS
> >  
> >  config EXTCON_SM5502
> >  	tristate "SM5502 EXTCON support"
> > +	depends on I2C
> >  	select IRQ_DOMAIN
> >  	select REGMAP_I2C
> >  	select REGMAP_IRQ
> > 
> 
> 
> 
> 
>        
>   
>          
> 
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