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SubjectRe: [PATCH V4 RESEND] dmaengine: Loongson1: Add Loongson1 dmaengine driver
On 04-07-21, 22:45, Kelvin Cheung wrote:
> Vinod Koul <vkoul@kernel.org> 于2021年6月7日周一 下午7:07写道:
> >
> > On 21-05-21, 07:02, Keguang Zhang wrote:
> >
> > > +config LOONGSON1_DMA
> > > + tristate "Loongson1 DMA support"
> > > + depends on MACH_LOONGSON32
> >
> > Why does it have to do that? The dma driver is generic..
>
> This driver is only available for LOONGSON32 CPUs.

the underlaying firmware would ensure this driver is probed if you have
such a device, so why have this restriction?

> > > +static struct platform_driver ls1x_dma_driver = {
> > > + .probe = ls1x_dma_probe,
> > > + .remove = ls1x_dma_remove,
> > > + .driver = {
> > > + .name = "ls1x-dma",
> > > + },
> >
> > No device tree?
>
> Because the LOONGSON32 platform doesn't support DT yet.

Okay so how is the platform device created?

--
~Vinod

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