Re: [PATCH v3 4/7] of: configure the platform device dma parameters

Linus Walleij
2014-05-28T13:32:59Z

On Wed, May 28, 2014 at 3:29 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Wednesday 28 May 2014 10:23:09 Linus Walleij wrote:

>> model = "ARM Integrator/AP";
>> compatible = "arm,integrator-ap";
>> + dma-ranges = <0x80000000 0x8 0x00000000 0x80000000>;
>>
>> aliases {
>> arm,timer-primary = &timer2;
>>
>
> It looks like you accidentally copied the ranges from keystone, even
> though that has a 64-bit root bus and you only have 32-bit.

Nah it was no accident, just good old incompetence ;-)

> I suspect what you want is
>
> dma-ranges = <0x80000000 0 0x80000000>;
>
> to translate dma_addr_t 0x80000000-0xffffffff to phys_addr_t 0x0-0x7fffffff
> rather than phys_addr_t 0x800000000-0x87fffffff.

Thanks, I'll fix up my patch.

Yours,
Linus Walleij