linux-kernel - Re: [PATCH] arm64: defconfig: Enable Texas Instruments UDMA driver

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Message-ID: <20200124200811.ytgs66cg5qpugi5c@localhost>
Date:   Fri, 24 Jan 2020 12:08:11 -0800
From:   Olof Johansson <olof@...om.net>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     catalin.marinas@....com, will@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        t-kristo@...com, vkoul@...nel.org, alexandre.belloni@...tlin.com,
        arnd@...db.de, soc@...nel.org
Subject: Re: [PATCH] arm64: defconfig: Enable Texas Instruments UDMA driver

On Fri, Jan 24, 2020 at 11:23:59AM +0200, Peter Ujfalusi wrote:
> The UDMA driver is used on K3 platforms (am654 and j721e).
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
> Hi,
> 
> The drivers for UDMA are already in linu-next and the DT patches are going to be
> also heading for 5.6.
> The only missing piece is to enable the drivers in defconfig so clients can use
> the DMA.

Hi Peter,

We normally like to see new options turned on after the driver/option has been
merged, so send this during or right after the merge window when that happens,
please.

I also see that this is statically enabling this driver -- we try to keep as
many drivers as possible as modules to avoid the static kernel from growing too
large. Would that be a suitable approach here, or is the driver needed to reach
rootfs for further module loading?

Thanks,

-Olof