linux-kernel - Re: [PATCH 2/3] ARM: bus: da8xx-syscfg: new driver

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Date:   Fri, 21 Oct 2016 12:56:13 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...libre.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Russell King <linux@...linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-drm <dri-devel@...ts.freedesktop.org>,
        linux-devicetree <devicetree@...r.kernel.org>,
        Jyri Sarha <jsarha@...com>, David Airlie <airlied@...ux.ie>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH 2/3] ARM: bus: da8xx-syscfg: new driver



On 21/10/16 12:53, Sekhar Nori wrote:
> On Friday 21 October 2016 02:55 PM, Tomi Valkeinen wrote:
>> On 20/10/16 22:39, Kevin Hilman wrote:
>>
>>> However, after our discussion on IRC, we'll respin this without the DT
>>> bindings at all.  Next version will just use static configuration data
>>> in the drivers/bus driver based on SoC compatible string, since for the
>>> use-cases I'm aware of, the settings are boot-time only.
>>
>> If it's static boot time config, why not do it in the u-boot?
> 
> Hardware initialization dependencies with boot-loader are tough to track
> and debug. The bootloader thats currently ships with the board may not
> have these settings, for example. This forces everyone to update their
> bootloader when shifting to mainline kernel.

Yep, true... We need something similar for AM335x too. And perhaps for
other SoCs too (AM4 comes to my mind).

 Tomi



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