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

[Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>]

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-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.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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