[PATCH v3 00/11] Add support for X86/ACPI camera sensor/PMIC setup with clk and regulator platform data

Hans de Goede
2021-10-10T18:59:10Z

Hi All,

Here is v2 of my patch-set adding support for camera sensor connected to a
TPS68470 PMIC on x86/ACPI devices.

v3 of this patch-set further reworks how to defer the binding of the
camera-sensor drivers till all clk/regulator/gpio consumer/lookup info has
been registered. See the new patch 1 + 2 (replacing v1 patch 1-3 /
v2 patch 1-2).

I'm quite happy with how this works now, so from my pov this is the final
version of the device-instantiation deferral code / approach.

###

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.

Assuming this series is acceptable to everyone, we need to talk about how
to merge this.

Assuming the i2c-core-acpi.c are ok with it patches 1 + 2 can both be
merged into linux-pm by Rafael, independent of the rest of the series
(there are some runtime deps on other changes for everything to work,
but the camera-sensors impacted by this are not fully supported yet in
the mainline kernel anyways).

For "[PATCH 03/13] platform_data: Add linux/platform_data/tps68470.h file",
which all further patches depend on I plan to provide an immutable branch
myself (once it has been reviewed), which the clk / regulator maintainers
can then merge before merging the clk / regulator driver which depends on
this.

And I will merge that IM-branch + patches 6-11 into the pdx86 tree myself.

Regards,

Hans

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

Hans de Goede (10):
ACPI: delay enumeration of devices with a _DEP pointing to an INT3472
device
i2c: acpi: Use acpi_dev_ready_for_enumeration() helper
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

drivers/acpi/scan.c | 36 ++-
drivers/clk/Kconfig | 6 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-tps68470.c | 256 ++++++++++++++++++
drivers/i2c/i2c-core-acpi.c | 5 +-
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} | 97 ++++++-
drivers/platform/x86/intel/int3472/tps68470.h | 25 ++
.../x86/intel/int3472/tps68470_board_data.c | 118 ++++++++
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/tps68470-regulator.c | 193 +++++++++++++
include/acpi/acpi_bus.h | 5 +-
include/linux/mfd/tps68470.h | 11 +
include/linux/platform_data/tps68470.h | 35 +++
20 files changed, 904 insertions(+), 150 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} (55%)
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

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2.31.1