linux-kernel - [RESEND PATCH v3 0/3] sh: make early

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Message-Id: <20180827090651.25062-1-brgl@bgdev.pl>
Date:   Mon, 27 Aug 2018 11:06:48 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Marc Zyngier <marc.zyngier@....com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Peter Rosin <peda@...ntia.se>, Jiri Slaby <jslaby@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Johan Hovold <johan@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Philippe Ombredanne <pombredanne@...b.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arch@...r.kernel.org,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [RESEND PATCH v3 0/3] sh: make early_platform code SuperH-specific

I recently started a discussion about the need for a proper early device
probing mechanism[1]. One that would be based on real platform drivers
and support both platform data and device tree.

While we're far from reaching any consensus on the implementation, Arnd
suggested that I start off by moving the SuperH-specific early platform
drivers implementation to arch/sh[2].

This series is the first attempt at making way for a new, less hacky
implementation.

The first patch removes the last instance of a non-sh driver using the
early_platform API. It can be removed since ARM no longer probes early
drivers.

The second patch moves all the early_platform code to arch/sh.

The last patch prefixes all early_platform symbols with 'sh_'.

[1] https://lkml.org/lkml/2018/4/26/657
[2] https://lkml.org/lkml/2018/4/27/239

v1 -> v2:
- certain drivers are compiled for arm/mach-shmobile too - we need to
  add ifdefs for CONFIG_SUPERH around early_platform calls

v2 -> v3:
- added a stub for is_early_platform_device() which always returns false
  on non-SuperH architectures

RESEND: rebased on top of v4.18-rc1 and verified that there are no build
failures.

RESEND AGAIN: rebased on top of v4.19-rc1 and verified builds again.

Bartosz Golaszewski (3):
  clocksource: timer-ti-dm: remove the early platform driver
    registration
  platform: move the early platform device support to arch/sh
  sh: add the sh_ prefix to early platform symbols

 arch/sh/drivers/Makefile               |   2 +-
 arch/sh/drivers/platform_early.c       | 347 +++++++++++++++++++++++++
 arch/sh/include/asm/platform_early.h   |  61 +++++
 arch/sh/kernel/cpu/sh2/setup-sh7619.c  |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-mxg.c    |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-sh7201.c |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-sh7203.c |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-sh7206.c |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-sh7264.c |   3 +-
 arch/sh/kernel/cpu/sh2a/setup-sh7269.c |   3 +-
 arch/sh/kernel/cpu/sh3/setup-sh3.c     |   1 +
 arch/sh/kernel/cpu/sh3/setup-sh7705.c  |   3 +-
 arch/sh/kernel/cpu/sh3/setup-sh770x.c  |   3 +-
 arch/sh/kernel/cpu/sh3/setup-sh7710.c  |   3 +-
 arch/sh/kernel/cpu/sh3/setup-sh7720.c  |   3 +-
 arch/sh/kernel/cpu/sh4/setup-sh4-202.c |   3 +-
 arch/sh/kernel/cpu/sh4/setup-sh7750.c  |   9 +-
 arch/sh/kernel/cpu/sh4/setup-sh7760.c  |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7343.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7366.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7722.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7723.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7724.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7734.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7757.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7763.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7770.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7780.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7785.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-sh7786.c |   3 +-
 arch/sh/kernel/cpu/sh4a/setup-shx3.c   |   3 +-
 arch/sh/kernel/cpu/sh5/setup-sh5.c     |   3 +-
 arch/sh/kernel/setup.c                 |   3 +-
 arch/sh/kernel/time.c                  |   5 +-
 drivers/base/platform.c                | 288 --------------------
 drivers/clocksource/sh_cmt.c           |  13 +-
 drivers/clocksource/sh_mtu2.c          |  13 +-
 drivers/clocksource/sh_tmu.c           |  14 +-
 drivers/clocksource/timer-ti-dm.c      |   1 -
 drivers/tty/serial/sh-sci.c            |  11 +-
 include/linux/platform_device.h        |  64 +----
 41 files changed, 525 insertions(+), 388 deletions(-)
 create mode 100644 arch/sh/drivers/platform_early.c
 create mode 100644 arch/sh/include/asm/platform_early.h

-- 
2.18.0