Re: [RESEND PATCH v3 1/2] dmaengine: vdma: Add 64 bit addressing support to the driver
From: Vinod Koul
Date: Wed Apr 06 2016 - 11:42:35 EST
On Wed, Apr 06, 2016 at 10:38:08AM +0530, Kedareswara rao Appana wrote:
> This VDMA is a soft ip, which can be programmed to support
> 32 bit addressing or greater than 32 bit addressing.
>
> When the VDMA ip is configured for 32 bit address space
> the buffer address is specified by a single register
> (0x5C for MM2S and 0xAC for S2MM channel).
>
> When the VDMA core is configured for an address space greater
> than 32 then each buffer address is specified by a combination of
> two registers.
>
> The first register specifies the LSB 32 bits of address,
> while the next register specifies the MSB 32 bits of address.
>
> For example, 5Ch will specify the LSB 32 bits while 60h will
> specify the MSB 32 bits of the first start address.
> So we need to program two registers at a time.
>
> This patch adds the 64 bit addressing support to the vdma driver.
Applied both, thanks
--
~Vinod