[PATCH 1/2] regmap: Add eplicit dependencies to catch "select" misuse

[PATCH 1/2] regmap: Add eplicit dependencies to catch "select" misuse

[Geert Uytterhoeven]

Add explicit dependencies for the various regmap modules, so Kconfig
will print a warning message when another module selects a regmap module
without fulfilling its dependencies.

Without this, it's much more difficult to find out which module did the
offending select.

Signed-off-by: Geert Uytterhoeven <geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>
---
 drivers/base/regmap/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 4251570610c9..8a3f51f7b1b9 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -11,12 +11,15 @@ config REGMAP
 
 config REGMAP_I2C
 	tristate
+	depends on I2C
 
 config REGMAP_SPI
 	tristate
+	depends on SPI
 
 config REGMAP_SPMI
 	tristate
+	depends on SPMI
 
 config REGMAP_MMIO
 	tristate
-- 
1.9.1

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

[Geert Uytterhoeven]

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
-- 
1.9.1

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Re: [PATCH 1/2] regmap: Add eplicit dependencies to catch "select" misuse

[Wolfram Sang]

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On Sun, Aug 17, 2014 at 12:08:57PM +0200, Geert Uytterhoeven wrote:
> Add explicit dependencies for the various regmap modules, so Kconfig
> will print a warning message when another module selects a regmap module
> without fulfilling its dependencies.
> 
> Without this, it's much more difficult to find out which module did the
> offending select.
> 
> Signed-off-by: Geert Uytterhoeven <geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>

Acked-by: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>


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Re: [PATCH 1/2] regmap: Add eplicit dependencies to catch "select" misuse

[Mark Brown]

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On Sun, Aug 17, 2014 at 12:08:57PM +0200, Geert Uytterhoeven wrote:
> Add explicit dependencies for the various regmap modules, so Kconfig
> will print a warning message when another module selects a regmap module
> without fulfilling its dependencies.

Applied, thanks.  The second patch is a bug fix independent of this one.

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

[Chanwoo Choi]

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


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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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-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
>>>
>>
>>
>>
>>
>>        
>>   
>>          
>>

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-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 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-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.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