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Date:   Thu, 26 Apr 2018 13:31:51 -0400
From:   Rich Felker <dalias@libc.org>
To:     Bartosz Golaszewski <brgl@bgdev.pl>
Cc:     Sekhar Nori <nsekhar@ti.com>, Kevin Hilman <khilman@kernel.org>,
        David Lechner <david@lechnology.com>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Frank Rowand <frowand.list@gmail.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Arend van Spriel <aspriel@gmail.com>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Michal Suchanek <msuchanek@suse.de>,
        Jan Kiszka <jan.kiszka@siemens.com>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Peter Rosin <peda@axentia.se>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH RFC PoC 0/2] platform: different approach to early
 platform drivers
Message-ID: <20180426173151.GJ3094@brightrain.aerifal.cx>
References: <20180426152920.21569-1-brgl@bgdev.pl>
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On Thu, Apr 26, 2018 at 05:29:18PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> This is a follow to my series[1] the aim of which was to introduce device tree
> support for early platform devices.
> 
> It was received rather negatively. Aside from using device tree to pass
> implementation specific details to the system, two important concerns were
> raised: no probe deferral support and the fact that currently the early devices
> never get converted to actual platform drivers. This series is a
> proof-of-concept that's trying to address those issues.
> 
> The only user of the current version of early platform drivers is the SuperH
> architecture. If this series eventually gets merged, we could simply replace
> the other solution.

Looking at a quick output of:

	grep -r -A10 early_devices[[] arch/sh/kernel/

it looks like all of the existing early platform devices are serial
ports, clocks, and clocksources. The switch to device tree should pick
them all up from CLK_OF_DECLARE, TIMER_OF_DECLARE, and
EARLYCON_DECLARE. Until that's complete, the existing code works
as-is. I don't see what problem you're trying to solve.

FYI I'm (sometimes-somewhat-absent) arch/sh co-maintainer.

Rich