Re: platform_driver_register() ??

["Nobin Mathew" <nobin.mathew@gmail.com>]

Hi Midhun,
   I think mmc driver is layered modules, only top block driver
registers driver under  "mmc_bus_type" bus, see
drivers/mmc/mmc_sysfs.c and mmc_block.c. I think they are creating a
tree of devices of same characteristics under that bus.
I think your driver is linux/drivers/mmc/imxmmc.c where it registers a
driver for device of type "platform_bus_type". This module will come
under above mentioned block driver.
Corresponding platform device is registered in
linux/arch/arm/mach-imx/generic.c see platform_device imx_mmc_device.

Nobin Mathew




On 7/3/07, Midhun Agnihotram <agnimidhun@gmail.com> wrote:
> Hi All,
>
>  I have an MMC driver for my kit (i.MX21 based cogent board
> CSB535FS), which is supplied by Cogent (Kernel version 2.6.16).
>
>   The original driver (linux/drivers/mmc/mmc_block.c) uses
> mmc_register_driver() method to register the driver but the one
> supplied by Cogent uses platform_driver_register() method. What is the
> difference between the two?
>
>
> Thanks,
> Midhun.
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