On Wed, Oct 10, 2012 at 12:21:04PM +0300, Andy Shevchenko wrote: > On Wed, Oct 10, 2012 at 12:08 PM, viresh kumar <viresh.ku...@linaro.org> > wrote: > > On Wed, Oct 10, 2012 at 2:34 PM, Andy Shevchenko > > <andriy.shevche...@linux.intel.com> wrote: > >> On Tue, 2012-10-02 at 14:41 +0300, Andy Shevchenko wrote: > >>> From: Heikki Krogerus <heikki.kroge...@linux.intel.com> > >>> > >>> Since v3.2 we have nice macro to define the platform driver's init and > >>> exit > >>> calls. This patch simplifies the dw_dmac driver by using that macro. > >> > >> Actually we can't do this. It will break initialization of some other > >> drivers. > > > > why? > > We have spi, i2c and hsuart devices connected to the DMA controller. > In case we would like to use DMA we have to have the dw_dmac loaded > before them. Currently we have spi driver on subsys_initcall level, > and Mika, who is developing it, will change to module_init_call level. > However, it will just hide the potential issue. He also tried to use > deferred module loading, but we don't know if it's good solution or > not, and that solution requires something to stop deferring at some > moment. > > Might be we missed something and there is a better solution.
if they can only work with DMA, they should return -EPROBE_DEFER so their probe() function can be called after DMA driver has finished probing. -- balbi
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