Order of suspension for pcmcia based usb host controller

Order of suspension for pcmcia based usb host controller

[rasmit.ranjan]

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Hi all, 
 
   I have a PCMCIA card which has a usb Host Controller (HC) on it. I am
writing Host Controller Driver (HCD) for this. I have pcmcia client
driver which is registering HC as a platform device.i.e. my HCD is a
platform driver. The device representation in linux-2.6.15.4 is given
below.
 
 
/sys/class/pcmcia-socket/pcmcia-socket1/device/1.0/myhcd/usb5/5-0:1.0
 
In my pcmcia client driver i get suspend event when i do selective
suspend of the card (pcmcia-socket1/device in device tree ) .  Platform
driver`s suspend entry point is getting called when i do selective
suspend of myhcd. Now if i do global suspend will Power Management
sub-system follow the device tree to suspend the card ? Which means PM
sub-system will suspend 5-0:1.0 , then it will suspend usb5, then myhcd
and then the pcmcia-socket1/device. So does it mean that in global
suspend platform driver`s suspend entry point will be getting called
before the pcmcia client driver`s suspend event ?  
Please suggest.
 
Thanks and regards,
Rasmit Ranjan swain.

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Re: Order of suspension for pcmcia based usb host controller

[Dominik Brodowski]

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Hi,

On Tue, Feb 21, 2006 at 06:15:26PM +0530, rasmit.ranjan@wipro.com wrote:
> In my pcmcia client driver i get suspend event when i do selective
> suspend of the card (pcmcia-socket1/device in device tree ) .  Platform
> driver`s suspend entry point is getting called when i do selective
> suspend of myhcd. Now if i do global suspend will Power Management
> sub-system follow the device tree to suspend the card ? Which means PM
> sub-system will suspend 5-0:1.0 , then it will suspend usb5, then myhcd
> and then the pcmcia-socket1/device. So does it mean that in global
> suspend platform driver`s suspend entry point will be getting called
> before the pcmcia client driver`s suspend event ?  

AFAIK the "children" (clients) will be called first, then the "parents"
(socket driver).

	Dominik

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