linux-kernel - Re: [PATCHv3 5/7] dmaengine: dw_dmac: add PCI part of the driver

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Message-ID: <CAHp75VdEyQP_kDeQgEanyfewQghvsAntLHKDNZGjte6Osc1kcw@mail.gmail.com>
Date:	Thu, 27 Sep 2012 11:08:12 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	balbi@...com
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Viresh Kumar <viresh.linux@...il.com>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org,
	spear-devel <spear-devel@...t.st.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: Re: [PATCHv3 5/7] dmaengine: dw_dmac: add PCI part of the driver

On Thu, Sep 27, 2012 at 10:49 AM, Felipe Balbi <balbi@...com> wrote:
> On Thu, Sep 27, 2012 at 10:31:59AM +0300, Andy Shevchenko wrote:
>> From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
>>
>> This is the PCI part of the DesignWare DMAC driver. The controller is usually
>> used in the Intel hardware such as Medfield.


>> --- /dev/null
>> +++ b/drivers/dma/dw_dmac_pci.c
>> @@ -0,0 +1,126 @@
>> +/*
>> + * PCI driver for the Synopsys DesignWare DMA Controller
>> + *
>> + * Copyright (C) 2012 Intel Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 as
>> + * published by the Free Software Foundation.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/pci.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/dw_dmac.h>
>> +
>> +static struct dw_dma_platform_data pdata = {
>
> "pdata" looks like it wants a prefix.
Okay.

>> +     .is_private = 1,
>> +     .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
>> +     .chan_priority = CHAN_PRIORITY_ASCENDING,
>> +};
>
> This is the same for all of the PCI IDs listed below, looks like it's
> best to just add it as platform_data of the dwc_dmac device directly,
> rather than passing a pointer to this via driver->data.
It potentially could be altered. I prefer to leave it as structure in
the pci driver.

>> +     static int instance;
> this could be a IDA instead.
Will look at it, thanks.

-- 
With Best Regards,
Andy Shevchenko
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