On Thu, Feb 2, 2017 at 10:17 AM, Anup Patel <anup.patel@xxxxxxxxxxxx> 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.