linux-kernel - Re: [PATCH 1/2] mfd: micon: Add Buffalo Kurobox Pro, Terastation II Pro/Live driver

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Message-ID: <20170105074509.GF24225@dell>
Date:   Thu, 5 Jan 2017 07:45:09 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux@...linux.org.uk,
        gregory.clement@...e-electrons.com, andrew@...n.ch,
        jason@...edaemon.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mfd: micon: Add Buffalo Kurobox Pro, Terastation II
 Pro/Live driver

On Wed, 04 Jan 2017, Florian Fainelli wrote:

> Le 01/04/17 à 03:22, Lee Jones a écrit :
> > On Wed, 28 Dec 2016, Florian Fainelli wrote:
> > 
> >> This driver is currently only used to reboot the devices, but the
> >> microcontroller hanging off UART1 on the Buffalo Kurobox Pro and
> >> Terastation II Pro/Live is capable of a lot more than that, which we
> >> will support in subsequent patches. For now, just add the reboot
> >> functionality to make the kernel reboot correctly.
> > 
> > This is not an MFD driver.  You have written a UART driver.
> > 
> > Please relocate it to drivers/char/tty/serial.
> 
> Not that simple, and as explained in the cover letter the UART attached
> micro controller can do a lot more than just reboot the machine, but

That's fine.  This is precisely why we have MFD.  But the core (MFD)
driver should only conduct set-up of shared resources, registration of
child devices and maybe some shared functionality required by >1 child
device.  All child device (i.e. UART) capability should be handled by
the child drivers.

> someone else is working on the driver, so this patch series can be ignored.

Okay.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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