Unregisrtering a platform driver from another platform driver.

Unregisrtering a platform driver from another platform driver.

[Andy Ng]

Dear Colleagues,

I would like to call "platform_driver_unregister" for a static module
A from a static  module B.
The static module A register its name  "physmap-flash".

Is there any kernel API to search and find the "physmap-flash" device,
and then call unregistered with "platform_driver_unregister" from
module B.

Any advice will be very much appreciated.

Best regards
A

Unregisrtering a platform driver from another platform driver.

[Arnd Bergmann]

On Wednesday 21 January 2015 10:27:35 Andy Ng wrote:
> Dear Colleagues,
> 
> I would like to call "platform_driver_unregister" for a static module
> A from a static  module B.
> The static module A register its name  "physmap-flash".
> 
> Is there any kernel API to search and find the "physmap-flash" device,
> and then call unregistered with "platform_driver_unregister" from
> module B.

I assume you don't actually mean platform_driver_unregister(), as
that would remove the entire driver, not just the connection between
the driver and the device.
 
> Any advice will be very much appreciated.

You can do it from user space using the 'unbind' attribute, but I suppose
that's not what you want.

Can you describe why you want to unbind the device?

	Arnd

Unregisrtering a platform driver from another platform driver.

[Andy Ng]

Thank you for your reply.
It is during the kernel boot phase, and I just want to remove it with
unregister mechanism.


On Wed, Jan 21, 2015 at 11:15 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Wednesday 21 January 2015 10:27:35 Andy Ng wrote:
>> Dear Colleagues,
>>
>> I would like to call "platform_driver_unregister" for a static module
>> A from a static  module B.
>> The static module A register its name  "physmap-flash".
>>
>> Is there any kernel API to search and find the "physmap-flash" device,
>> and then call unregistered with "platform_driver_unregister" from
>> module B.
>
> I assume you don't actually mean platform_driver_unregister(), as
> that would remove the entire driver, not just the connection between
> the driver and the device.
>
>> Any advice will be very much appreciated.
>
> You can do it from user space using the 'unbind' attribute, but I suppose
> that's not what you want.
>
> Can you describe why you want to unbind the device?
>
>         Arnd

Unregisrtering a platform driver from another platform driver.

[Arnd Bergmann]

On Wednesday 21 January 2015 12:10:45 Andy Ng wrote:
> Thank you for your reply.
> It is during the kernel boot phase, and I just want to remove it with
> unregister mechanism.
> 

I don't think there is a way to solve your problem then.

	Arnd

Unregisrtering a platform driver from another platform driver.

[Russell King - ARM Linux]

On Wed, Jan 21, 2015 at 10:27:35AM +0000, Andy Ng wrote:
> Dear Colleagues,
> 
> I would like to call "platform_driver_unregister" for a static module
> A from a static  module B.
> The static module A register its name  "physmap-flash".
> 
> Is there any kernel API to search and find the "physmap-flash" device,
> and then call unregistered with "platform_driver_unregister" from
> module B.

Why do you want to do this?  What is your motivation?

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