[PATCH 0/2] Add new reg_update_bits() support

[Baolin Wang <baolin.wang7@gmail.com>]

The Spreadtrum platform uses a special set/clear method to update
registers' bits, thus this patch set registers a physical regmap
bus into syscon core to support this feature instead of using the
MMIO bus, which is not a physical regmap bus.

Any comments are welcome. Thanks.

Changes from RFC v2:
 - Drop regmap change, which was applied by Mark.
 - Add more information about how to use set/clear.
 - Add checking to ensure the platform is compatible with
 using a new physical regmap bus.
 
Changes from RFC v1:
 - Add new helper to registers a physical regmap bus instead of
 using the MMIO bus.

Baolin Wang (2):
  mfd: syscon: Support physical regmap bus
  soc: sprd: Add Spreadtrum special bits updating support

 drivers/mfd/syscon.c           | 23 +++++++++-
 drivers/soc/Kconfig            |  1 +
 drivers/soc/Makefile           |  1 +
 drivers/soc/sprd/Kconfig       | 16 +++++++
 drivers/soc/sprd/Makefile      |  2 +
 drivers/soc/sprd/sprd_syscon.c | 82 ++++++++++++++++++++++++++++++++++
 include/linux/mfd/syscon.h     |  7 +++
 7 files changed, 130 insertions(+), 2 deletions(-)
 create mode 100644 drivers/soc/sprd/Kconfig
 create mode 100644 drivers/soc/sprd/Makefile
 create mode 100644 drivers/soc/sprd/sprd_syscon.c

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2.17.1