[PATCH v2 0/3] power: X-Powers PMIC regulator support

Samuel Holland samuel at sholland.org
Sun Jan 22 00:13:03 CET 2023

This series adds a driver for the regulators in X-Powers AXPxxx PMICs.
It supports everything except regulators shared with GPIO pins. Those
have a different register interface, so they may need a separate driver.

Regulator setup in U-Boot proper is needed for Ethernet and HDMI/LCD
display output. For some SoCs (H616), this driver could possibly be used
for the DRAM regulator setup done in SPL. Older SoCs do all of their
regulator setup in SPL. Some of that is probably necessary, but I think
a lot of it is not and can be deferred to U-Boot proper or Linux; that's
just where it was convenient to initialize the PMIC at the time.

The main goal here is to replace the corresponding code in TF-A, both
because of TF-A size constraints, and because the TF-A code is too
simple/overzealous and breaks EPHY power sequencing on some boards.

Changes in v2:
 - Dual-license the driver
 - Add a comment about the requirements for the voltage table
 - Fix AXP22x ALDO3 enable bit position

Samuel Holland (3):
  power: pmic: axp: Provide a variant ID in the driver data
  power: regulator: Add a driver for AXP PMIC regulators
  power: pmic: axp: Bind regulators from the DT

 drivers/power/pmic/axp.c                |  36 ++-
 drivers/power/regulator/Kconfig         |  14 ++
 drivers/power/regulator/Makefile        |   1 +
 drivers/power/regulator/axp_regulator.c | 312 ++++++++++++++++++++++++
 include/axp_pmic.h                      |  12 +
 5 files changed, 366 insertions(+), 9 deletions(-)
 create mode 100644 drivers/power/regulator/axp_regulator.c


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