[PATCH v3 00/13] Move pad retention control to Exynos pin controller driver

Marek Szyprowski
2017-01-19T13:48:40Z

Hello,

This patchset is a follow-up of my work on adding runtime PM support
to Exynos pin controller driver:
http://www.spinics.net/lists/arm-kernel/msg550161.html

Runtime PM support itself needs a bit more discussion, so lets first focus on
the prerequisites.

In case of Exynos pin controller driver it is a pad retention control. In
current code it was handled by machine and PMU code and had no relation to
what pin controller driver does. This patch series moves pad retention
control to pin controller driver. While implementing it, I also did a little
cleanup of both Exynos PMU and pin controller drivers. Exynos PMU driver
now provides a convenient function to get PMU regmap from other Exynos drivers.

Patch #1 provides a new interface to get Exynos PMU regmap, which is used
by the patch #11. Patches 2-10 are additional cleanups to the code I was
modyfying. Patches 10-12 implements the move of the retention control and
patch #13 is another cleanup, which is possible after removing dependency
to platform PM code.

Patches are based on linux-next from 2017.01.19 with Exynos4415 support
removal patch applied: https://lkml.org/lkml/2017/1/14/137

Changelog:

v3:
- fixed return value from exynos_get_pmu_regmap stub (pointed by Tomasz Figa)
- removed unnecessary regmap include in pmu.h
- fixed comments in retention control structure description
- simplified exynos_retention_disable function by moving samsung_retention_ctrl
structure to separate variable
- collected Acks

v2: https://www.spinics.net/lists/arm-kernel/msg555048.html
- reworked exynos_get_pmu_regmap() function and moved to Exynos PMU driver,
now it doesn't depend on driver probe order thus doesn't need to defer probing
of pinctrl driver if PMU has not yet been probed
- collected Acks, minor fixes according to review comments

v1: https://www.spinics.net/lists/arm-kernel/msg554487.html
- removed the need to add PMU phandles to all pin controller nodes, so old DTBs
are properly supported. This has been achieved by getting PMU regmap from
the "exynos-pmu" device of fixed name.
- more cleanup in Exynos pin controller driver: added missing entries in DT
documentation, removed "memory allocation failed" messages and added
initconst annotations.
- added support for s5pv210.
- reworked retention control code to be simpler and ready for adding Exynos5433
support.

v0: http://www.spinics.net/lists/arm-kernel/msg550161.html
- initial version
- part of "Runtime PM for Exynos pin controller driver" patchset

Patch summary:

Marek Szyprowski (13):
soc: samsung: pmu: Provide global function to get PMU regmap
soc: samsung: pmu: Use of_device_get_match_data helper
soc: samsung: pmu: Remove messages for failed memory allocation
pinctrl: samsung: Document Exynos3250 SoC support
pinctrl: samsung: Remove messages for failed memory allocation
pinctrl: samsung: Fix samsung_pinctrl_create_functions return value
pinctrl: samsung: Add missing initconst annotation
pinctrl: samsung: Remove dead code
pinctrl: samsung: Use generic of_device_get_match_data helper
pinctrl: samsung: Add infrastructure for pin-bank retention control
pinctrl: samsung: Move retention control from mach-exynos to the
pinctrl driver
pinctrl: samsung: Move retention control from mach-s5pv210 to the
pinctrl driver
pinctrl: samsung: Replace syscore ops with standard platform device
pm_ops

.../bindings/pinctrl/samsung-pinctrl.txt | 1 +
arch/arm/mach-exynos/suspend.c | 64 ------
arch/arm/mach-s5pv210/pm.c | 7 -
arch/arm/mach-s5pv210/regs-clock.h | 4 -
drivers/pinctrl/samsung/pinctrl-exynos.c | 231 +++++++++++++++++++--
drivers/pinctrl/samsung/pinctrl-s3c64xx.c | 12 +-
drivers/pinctrl/samsung/pinctrl-samsung.c | 123 ++++-------
drivers/pinctrl/samsung/pinctrl-samsung.h | 42 ++++
drivers/soc/samsung/exynos-pmu.c | 22 +-
include/linux/soc/samsung/exynos-pmu.h | 10 +
10 files changed, 322 insertions(+), 194 deletions(-)

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1.9.1