# Re: \[PATCH 1/6\] mailbox: Add new API mbox\_channel\_device() for clients

- From: Anup Patel \<hidden\>
- Date: 2017-02-06 04:27:17 
- List: linux-crypto
- Page: https://ratatoskr.run/linux-crypto/2017/02/4927705
- Thread: https://ratatoskr.run/linux-devicetree/2017/02/4925794/t.md

```text
On Fri, Feb 3, 2017 at 5:35 PM, Jassi Brar [ref] wrote:
> On Thu, Feb 2, 2017 at 10:17 AM, Anup Patel [ref] wrote:
>> The remote processor can have DMAENGINE capabilities and client
>> can pass data to be processed via main memory. In such cases,
>> the client will require DMAble memory for remote processor.
>>
>> This patch adds new API mbox_channel_device() which can be
>> used by clients to get struct device pointer of underlying
>> mailbox controller. This struct device pointer of mailbox
>> controller can be used by clients to allocate DMAble memory
>> for remote processor.
>>
> IIUC, DT already provides a way for what you need.

Thanks for the suggestion. I will explore in this direction and
try to avoid this patch in next revision.

Can you please have a look at FlexRM driver which I
had submitted previously?
https://lkml.org/lkml/2017/1/5/291
https://lkml.org/lkml/2017/1/5/293

Regards,
Anup
```