[v6,00/15] Add support for X86/ACPI camera sensor/PMIC setup with clk and regulator platform data

Here is v6 of my patch-set adding support for camera sensor connected to a
TPS68470 PMIC on x86/ACPI devices.

Changes in v6:
- Add support for the VCM (Voice Coil Motor) controlling the focus of
  the back/main sensor camera lens:
  - Patch 3 and patches 13-15 are new patches for this
  - While working on this I learned that the VIO regulator is an always on
    regulator and must be configured at the same voltage as VSIO, the
    tps68470-regulator driver and the constraints have been updated for this
- Addressed clk-tps68470 driver review-remarks
- Some minor tweaks based on review-remarks from Andy
- Add Andy's Reviewed-by to all patches which were also in v5

I'm quite happy with how this works now, so from my pov this is ready
for merging now.

Patch 2 already has acks for merging through another tree. Patch 3
"i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function" is new,
Mika, Wolfram may we have your Ack for merging this one through
Rafael's ACPI or through my platform/drivers/x86 tree too ?

Once we have acks to merge both i2c-core-acpi.c through another tree,
there are 2 options:

  a. 1. Patches 1-3 merged by Rafael, Rafael provides an IM branch
     2. I create an IM branch with patches 4 + 7-12
     3. clk + regulator maintainers merge my IM branch + clk / regulator patch
     4. media maintainers merge Rafael's IM branch + media patches
  b. 1. I create an IM branch with patches 1-4 + 7-12 (with Rafael's ack for 1)
     2. clk / regulator / media maintainers merge my IM branch + their resp. patches

Assuming Rafael does not foresee any conflicts caused by the few small ACPI
patches I believe that going with plan b would be best.

Rafael is plan b. ok with you ? You did already Ack patch 1 but IIRC that
was not specifically for merging it through another tree.

Regards,

Hans


p.s.

For the record here is part of the old cover-letter of v5:
    
Changes in v5:
- Update regulator_init_data in patch 10/11 to include the VCM regulator
- Address various small review remarks from Andy
- Make a couple of functions / vars static in the clk + regulator drivers
  Reported-by: kernel test robot <lkp@intel.com>

Changes in v4:
[PATCH 01/11] ACPI: delay enumeration of devices with a _DEP
              pointing to an INT3472 device:
- Move the acpi_dev_ready_for_enumeration() check to acpi_bus_attach()
  (replacing the acpi_device_is_present() check there)

[PATCH 04/11] regulator: Introduce tps68470-regulator driver:
- Make the top comment block use c++ style comments
- Drop the bogus builtin regulator_init_data
- Make the driver enable the PMIC clk when enabling the Core buck
  regulator, this switching regulator needs the PLL to be on
- Kconfig: add || COMPILE_TEST, fix help text

[PATCH 05/11] clk: Introduce clk-tps68470 driver
- Kconfig: select REGMAP_I2C, add || COMPILE_TEST, fix help text
- tps68470_clk_prepare(): Wait for the PLL to lock before returning
- tps68470_clk_unprepare(): Remove unnecessary clearing of divider regs
- tps68470_clk_probe(): Use devm_clk_hw_register()
- Misc. small cleanups

The clk and regulator frameworks expect clk/regulator consumer-devices
to have info about the consumed clks/regulators described in the device's
fw_node, but on ACPI this info is missing.

This series worksaround this by providing platform_data with the info to
the TPS68470 clk/regulator MFD cells.

Patches 1 - 2 deal with a probe-ordering problem this introduces,
since the lookups are only registered when the provider-driver binds,
trying to get these clks/regulators before then results in a -ENOENT
error for clks and a dummy regulator for regulators. See the patches
for more details.

Patch 3 adds a header file which adds tps68470_clk_platform_data and
tps68470_regulator_platform_data structs. The futher patches depend on
this new header file.

Patch 4 + 5 add the TPS68470 clk and regulator drivers

Patches 6 - 11 Modify the INT3472 driver which instantiates the MFD cells to
provide the necessary platform-data.


Daniel Scally (1):
  platform/x86: int3472: Enable I2c daisy chain

Hans de Goede (14):
  ACPI: delay enumeration of devices with a _DEP pointing to an INT3472
    device
  i2c: acpi: Use acpi_dev_ready_for_enumeration() helper
  i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function
  platform_data: Add linux/platform_data/tps68470.h file
  regulator: Introduce tps68470-regulator driver
  clk: Introduce clk-tps68470 driver
  platform/x86: int3472: Split into 2 drivers
  platform/x86: int3472: Add get_sensor_adev_and_name() helper
  platform/x86: int3472: Pass tps68470_clk_platform_data to the
    tps68470-regulator MFD-cell
  platform/x86: int3472: Pass tps68470_regulator_platform_data to the
    tps68470-regulator MFD-cell
  platform/x86: int3472: Deal with probe ordering issues
  media: ipu3-cio2: Defer probing until the PMIC is fully setup
  media: ipu3-cio2: Call cio2_bridge_init() before anything else
  media: ipu3-cio2: Add support for instantiating i2c-clients for VCMs

 drivers/acpi/scan.c                           |  37 ++-
 drivers/clk/Kconfig                           |   8 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/clk-tps68470.c                    | 257 ++++++++++++++++++
 drivers/i2c/i2c-core-acpi.c                   |  23 +-
 drivers/media/pci/intel/ipu3/cio2-bridge.c    |  92 +++++++
 drivers/media/pci/intel/ipu3/cio2-bridge.h    |  16 +-
 drivers/media/pci/intel/ipu3/ipu3-cio2-main.c |  10 +-
 drivers/platform/x86/intel/int3472/Makefile   |   9 +-
 ...lk_and_regulator.c => clk_and_regulator.c} |   2 +-
 drivers/platform/x86/intel/int3472/common.c   |  82 ++++++
 .../{intel_skl_int3472_common.h => common.h}  |   6 +-
 ...ntel_skl_int3472_discrete.c => discrete.c} |  51 ++--
 .../intel/int3472/intel_skl_int3472_common.c  | 106 --------
 ...ntel_skl_int3472_tps68470.c => tps68470.c} |  99 ++++++-
 drivers/platform/x86/intel/int3472/tps68470.h |  25 ++
 .../x86/intel/int3472/tps68470_board_data.c   | 145 ++++++++++
 drivers/regulator/Kconfig                     |   9 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/tps68470-regulator.c        | 201 ++++++++++++++
 include/acpi/acpi_bus.h                       |   5 +-
 include/linux/i2c.h                           |  17 +-
 include/linux/mfd/tps68470.h                  |  11 +
 include/linux/platform_data/tps68470.h        |  35 +++
 24 files changed, 1080 insertions(+), 168 deletions(-)
 create mode 100644 drivers/clk/clk-tps68470.c
 rename drivers/platform/x86/intel/int3472/{intel_skl_int3472_clk_and_regulator.c => clk_and_regulator.c} (99%)
 create mode 100644 drivers/platform/x86/intel/int3472/common.c
 rename drivers/platform/x86/intel/int3472/{intel_skl_int3472_common.h => common.h} (94%)
 rename drivers/platform/x86/intel/int3472/{intel_skl_int3472_discrete.c => discrete.c} (91%)
 delete mode 100644 drivers/platform/x86/intel/int3472/intel_skl_int3472_common.c
 rename drivers/platform/x86/intel/int3472/{intel_skl_int3472_tps68470.c => tps68470.c} (54%)
 create mode 100644 drivers/platform/x86/intel/int3472/tps68470.h
 create mode 100644 drivers/platform/x86/intel/int3472/tps68470_board_data.c
 create mode 100644 drivers/regulator/tps68470-regulator.c
 create mode 100644 include/linux/platform_data/tps68470.h