Handle reboot for Exynos SoC via restart_handler

This patch removes restart hook from machine_desc of Exynos, and moves respective code into reboot_notifiers.

Exynos5440 handles reboot via clock register so let's register a restart_handler in Exynos5440 clock driver.
For rest Exynos SoC, reboot is handled via PMU SWRESET register so let's register a restart_handler in PMU driver for handling this.

This patch is inspired and dependent on following patch series[1] from Geunter Roeck.

Also this patch is dependent on PMU platform driver patch [2] by me, and has been prepared on top of it.

[1]: kernel: Add support for kernel restart handler call chain
https://lkml.org/lkml/2014/8/19/652

[2]: ARM: Exynos: Convert PMU implementation into a platform driver
https://lkml.org/lkml/2014/10/6/89

I have tested reboot functionality on Exynos3250 based board, on kgene/for-next as well as linux-next's next-20140925 tag.

Patch v2 and related discussion can be found here
http://www.spinics.net/lists/linux-samsung-soc/msg37457.html

Changes since v2:
- Used register_restart_handler instead of register_reboot_notifier.
- Updated notifier names and commit message accordingly.

Changes since v1:
- Addressed review comments from Tomasz Figa. Removed usage of local variables where ever unnecessary.
- Make reg_base as global in clk-exynos5440.c file, to avoid iomapping it again in reboot_notifier handler.

Pankaj Dubey (2):
clk: samsung: exynos5440: move restart code into clock driver
ARM: EXYNOS: PMU: move restart code into pmu driver

 arch/arm/mach-exynos/common.h        |    1 -
 arch/arm/mach-exynos/exynos.c        |   23 -----------------------
 arch/arm/mach-exynos/pmu.c           |   24 ++++++++++++++++++++++++
 drivers/clk/samsung/clk-exynos5440.c |   29 ++++++++++++++++++++++++++++-
 4 files changed, 52 insertions(+), 25 deletions(-)

Signature · 1 line

1.7.9.5