[PATCH v4 0/2] Add new physical regmap bus support

From: Baolin Wang
Date: Sat May 16 2020 - 06:13:06 EST


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

Any comments are welcome. Thanks.

Changes from v3:
- Remove vendor specific support from the syscon driver, and export
a weak function to support physical regmap bus.

Changes from v2:
- Fix building errors without enabling CONFIG_ARCH_SPRD.

Changes from v1:
- Add WARN_ONCE() for seting bits and clearing bits at the same time.
- Remove the Spreadtrum SoC syscon driver, instead moving the regmap_bus
instance into syscon.c driver.

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 | 9 +++-
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/sprd/Kconfig | 16 +++++++
drivers/soc/sprd/Makefile | 2 +
drivers/soc/sprd/sprd_syscon.c | 86 ++++++++++++++++++++++++++++++++++
include/linux/mfd/syscon.h | 11 +++++
7 files changed, 125 insertions(+), 1 deletion(-)
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