[U-Boot] [PATCH 2/6] soc: ti: k3: add navss ringacc driver

[Tom Rini <trini@konsulko.com>]

On Tue, Jan 22, 2019 at 08:33:55PM +0530, Vignesh R wrote:

> From: Grygorii Strashko <grygorii.strashko@ti.com>
> 
> The Ring Accelerator (RINGACC or RA) provides hardware acceleration to
> enable straightforward passing of work between a producer and a consumer.
> There is one RINGACC module per NAVSS on TI AM65x SoCs.
> 
> The RINGACC converts constant-address read and write accesses to equivalent
> read or write accesses to a circular data structure in memory. The RINGACC
> eliminates the need for each DMA controller which needs to access ring
> elements from having to know the current state of the ring (base address,
> current offset). The DMA controller performs a read or write access to a
> specific address range (which maps to the source interface on the RINGACC)
> and the RINGACC replaces the address for the transaction with a new address
> which corresponds to the head or tail element of the ring (head for reads,
> tail for writes). Since the RINGACC maintains the state, multiple DMA
> controllers or channels are allowed to coherently share the same rings as
> applicable. The RINGACC is able to place data which is destined towards
> software into cached memory directly.
> 
> Supported ring modes:
>  - Ring Mode
>  - Messaging Mode
>  - Credentials Mode
>  - Queue Manager Mode
> 
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> Signed-off-by: Vignesh R <vigneshr@ti.com>

The code is fine, so:
Reviewed-by: Tom Rini <trini@konsulko.com>

And after checking in Linux real quick, a follow-up to move the TI
Keystone code from drivers/soc/keystone to drivers/soc/ti/ would be good
for overall consistency.  I see why this new stuff is under
drivers/soc/ti/ so we should move the other keystone stuff over to
follow.

-- 
Tom
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