linux-kernel - Re: [PATCH v7 05/11] dmaengine: Introduce DMA-device device

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Message-ID: <20200710084503.GE3703480@smile.fi.intel.com>
Date:   Fri, 10 Jul 2020 11:45:03 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Vinod Koul <vkoul@...nel.org>, Viresh Kumar <vireshk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>,
        Rob Herring <robh+dt@...nel.org>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 05/11] dmaengine: Introduce DMA-device device_caps
 callback

On Fri, Jul 10, 2020 at 01:45:44AM +0300, Serge Semin wrote:
> There are DMA devices (like ours version of Synopsys DW DMAC) which have
> DMA capabilities non-uniformly redistributed between the device channels.
> In order to provide a way of exposing the channel-specific parameters to
> the DMA engine consumers, we introduce a new DMA-device callback. In case
> if provided it gets called from the dma_get_slave_caps() method and is
> able to override the generic DMA-device capabilities.

In light of recent developments consider not to add 'slave' and a such words to the kernel.


-- 
With Best Regards,
Andy Shevchenko