Re: Re: [PATCH 2/2] extcon: sm5502: EXTCON_SM5502 should depend on I2C

Re: Re: [PATCH 2/2] extcon: sm5502: EXTCON_SM5502 should depend on I2C

[MyungJoo Ham]

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> 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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Re: [PATCH 2/2] extcon: sm5502: EXTCON_SM5502 should depend on I2C

[Chanwoo Choi]

Dear Myungjoo,

On 08/21/2014 02:27 PM, MyungJoo Ham wrote:
>> 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?

The previous REGMAP_I2C has not the dependency on I2C.
So, Greert posted following patch[1] to fix it.
[1] https://lkml.org/lkml/2014/8/17/27

Also, if I2C is 'm' (module) and some driver has not dependency on I2C,
build break happen.

Thanks
Chanwoo Choi,


> 
> 
> 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
>>>
>>
>>
>>
>>
>>        
>>   
>>          
>>

Re: [PATCH 2/2] extcon: sm5502: EXTCON_SM5502 should depend on I2C

[Geert Uytterhoeven]

On Thu, Aug 21, 2014 at 7:45 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
> On 08/21/2014 02:27 PM, MyungJoo Ham wrote:
>>> 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?

REGMAP_I2C is meant to be "select"ed by its users. So these users
should depend on I2C, as "select" does not check dependencies.

> The previous REGMAP_I2C has not the dependency on I2C.
> So, Greert posted following patch[1] to fix it.
> [1] https://lkml.org/lkml/2014/8/17/27
>
> Also, if I2C is 'm' (module) and some driver has not dependency on I2C,
> build break happen.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds