Hi All,
I am working with pxamci driver(2.6.22.1). I have made , core and host
as separate modules.
what is the correct order of loading the modules
i am doing in this order first core (mmc_core.ko), then card(mmc_block.ko)
after that host driver ( pxamci.ko). Is this correct.
I do not know much about Linux device model.
i saw that pxamci.ko driver registers it self as platform_driver. When
does its probe function is called. Is it called immediately after
platform_driver_register(&pxamci_driver) is called.
also in card driver (mmc_block.ko) in block.c file i saw a probe
function(mmc_blk_probe). How does it is invoked .
Thanks in advance for your help.
--
Thanks
raki
On Wed, 26 Dec 2007 10:40:22 -0800
"raki john" <[email protected]> wrote:
> Hi All,
>
> I am working with pxamci driver(2.6.22.1). I have made , core and host
> as separate modules.
>
> what is the correct order of loading the modules
>
> i am doing in this order first core (mmc_core.ko), then card(mmc_block.ko)
> after that host driver ( pxamci.ko). Is this correct.
>
If you're using just insmod, then yes, this is a valid order. The only thing that is crucial is that mmc_core is loaded before any of the other. If you use modprobe that will happen automatically.
> I do not know much about Linux device model.
>
There's lots of info on the web and in the Documentation/ directory of the kernel source if you want to indulge yourself.
> i saw that pxamci.ko driver registers it self as platform_driver. When
> does its probe function is called. Is it called immediately after
> platform_driver_register(&pxamci_driver) is called.
>
For pxamci, yes. More specifically, the probe function is called when there is both a driver (created by platform_driver_register()) and a device (platform_device_register()) available. But since the device is added very early in the pxamci case, the magic will happen when the driver registers.
> also in card driver (mmc_block.ko) in block.c file i saw a probe
> function(mmc_blk_probe). How does it is invoked .
>
When the corresponding device is registered. In this case it is whenever a card is detected and initialized.
Rgds
Pierre