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Subject[PATCH v6 0/7] Add the Lantiq PEF2256 audio support

This series adds support for audio using the Lantiq PEF2256 framer.

The Lantiq PEF2256 is a framer and line interface component designed to
fulfill all required interfacing between an analog E1/T1/J1 line and the
digital PCM system highway/H.100 bus.

The first part of this series (patches 1 to 4) adds the Lantiq PEF2256
driver core fixing a MFD core issue at patch 2.
The patch 5 adds the PEF2256 pinmux support.
The patch 6 adds the audio support using the Lantiq PEF2256 driver core.
The last patch adds myself as the PEF2256 maintainer.

The consumer/provider relation between the codec and the driver core
allows to use the PEF2256 framer for other purpose than audio support.

Compared to the previous iteration
This v6 series mainly:
- Use regmap
- Move the pinmux part to the pinctrl subsystem
- Move register definitions to header files.
- Split pef2256_setup_e1() in several parts.
- Fixed issues raised by
- Removed debug prints.

Best regards,
Herve Codina

Changes v5 -> v6
- Patch 1
Add 'Reviewed-by: Krzysztof Kozlowski <>'

- Patch 2
New patch added fixing an MFD core issue.

- Patch 3 (patch 2 in v5)
Remove the pinmux part.
Move registers definition to a header file and rework the
Use a regmap for register accesses
Various minor fixes (typos, comments, ...)
Fixed issues raised by --strict
Removed debug prints.

- Patch 4 (patch 3 in v5)
No changes

- Patch 5
New patch adding the PEF2256 pinmux part in the pinctrl subsystem.

- Patch 6 (patch 4 in v5)
Fixed issues raised by --strict

- Patch 7 (patch 5 in v5)
Updated according to files creation and move.

Changes v4 -> v5
- Patch 1
Fix 'additionalProperties' and 'unevaluatedProperties' positions
Fix sub-nodes names suffixes

Changes v3 -> v4
- Patch 1
Merge the codec sub-node description.
Move the 'allOf' property after the 'required' property.
Rework the example to be more complete.

- Patches 2 and 5
Drop of_match_ptr()

- Patch 2
Add 'depends on OF' as pinconf_generic_dt_node_to_map_pin() needs OF
support to be compiled (error raised by the kernel test robot).

- Patch 4
Remove patch (merged in patch 1)

Changes v2 -> v3
- Patch 1
Remove unneeded 'allOf' and quotes.
Add several 'additionalProperties: false'
Fix example (node name, interrupts and reg properties)
Replace the lantiq,sysclk-rate-hz property by sclkr and sclkx clocks.
Define 'lantiq,frame-format' property in top level.
Move to MFD

- Patch 2
Fix some #define.
Compact the register accessor helpers.
Rework pef2256_get_version().
Merge v1.2 and v2.x GCM setup functions into one pef2256_setup_gcm().
Update comments, avoid duplicates and change some conditionals.
Remove the carrier spinlock and use atomic_t.
Make exported symbol consistent and use EXPORT_SYMBOL_GPL.
Remove the no more needed pef2256_get_byphandle() and
Replace the lantiq,sysclk-rate-hz property by sclkr and sclkx clocks.
Move to MFD

- Patch 4
Remove, merged with patch 7

- Patch 4 (patch 5 in v2)
Update title and description.
Remove incorrect SPI reference.
Remove the 'lantiq,pef2256' phandle.
Fix commit log

- Patch 5 (patch 6 in v2)
Remove devm_pef2256_get_byphandle().
Fix commit log

- Patch 6 (patch 7 in v2)
Merge v2 patch 4. One entry only for PEF2256

Changes v1 -> v2
- Patch 2
Remove duplicate const qualifiers.
Add HAS_IOMEM as a dependency

- Patch 3
Fix a "Block quote ends without a blank line; unexpected unindent"
syntax issue.

Herve Codina (7):
dt-bindings: mfd: Add the Lantiq PEF2256 E1/T1/J1 framer
mfd: core: Ensure disabled devices are skiped without aborting
mfd: Add support for the Lantiq PEF2256 framer
Documentation: sysfs: Document the Lantiq PEF2256 sysfs entry
pinctrl: Add support for the Lantic PEF2256 pinmux
ASoC: codecs: Add support for the Lantiq PEF2256 codec
MAINTAINERS: Add the Lantiq PEF2256 driver entry

.../sysfs-bus-platform-devices-pef2256 | 12 +
.../bindings/mfd/lantiq,pef2256.yaml | 267 +++++
drivers/mfd/Kconfig | 16 +
drivers/mfd/Makefile | 1 +
drivers/mfd/mfd-core.c | 18 +-
drivers/mfd/pef2256-regs.h | 250 +++++
drivers/mfd/pef2256.c | 950 ++++++++++++++++++
drivers/pinctrl/Kconfig | 14 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-pef2256-regs.h | 65 ++
drivers/pinctrl/pinctrl-pef2256.c | 310 ++++++
include/linux/mfd/pef2256.h | 52 +
sound/soc/codecs/Kconfig | 14 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/pef2256-codec.c | 390 +++++++
16 files changed, 2369 insertions(+), 5 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-devices-pef2256
create mode 100644 Documentation/devicetree/bindings/mfd/lantiq,pef2256.yaml
create mode 100644 drivers/mfd/pef2256-regs.h
create mode 100644 drivers/mfd/pef2256.c
create mode 100644 drivers/pinctrl/pinctrl-pef2256-regs.h
create mode 100644 drivers/pinctrl/pinctrl-pef2256.c
create mode 100644 include/linux/mfd/pef2256.h
create mode 100644 sound/soc/codecs/pef2256-codec.c


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