Hi,
This series improves support for the Maxim Integrated MAX77759
companion PMIC for USB Type-C applications using the MFD framework.
This series must be applied in-order, due to interdependencies of some
of the patches:
* to avoid use of undocumented compatibles by the newly added drivers,
the bindings are added first in this series
* patch 1 ("dt-bindings: gpio: add max77759 binding") also creates a
new MAINTAINERS entry, including a wildcard match for the other
bindings in this series
* patch 3 ("dt-bindings: mfd: add max77759 binding") references the
bindings added in patch 1 and 2 and can not work if those aren't
available
* patch 4 ("mfd: max77759: add Maxim MAX77759 core mfd driver") adds
the core MFD driver, which also exposes an API to its leaf drivers
and is used by patches 5 and 6
* patches 5 and 6 won't compile without patch 4
The MAX77759 PMIC includes Battery Charger, Fuel Gauge, temperature
sensors, USB Type-C Port Controller (TCPC), NVMEM, and a GPIO expander.
This PMIC is used on the Google Pixel 6 and 6 Pro (oriole / raven).
This series adds support for the top-level MFD device, the gpio, and
nvmem cells. Other components are excluded for the following reasons:
While in the same package, Fuel Gauge and TCPC have separate and
independent I2C addresses, register maps, interrupt lines, and
aren't part of the top-level package interrupt hierarchy.
Furthermore, a driver for the TCPC part exists already (in
drivers/usb/typec/tcpm/tcpci_maxim_core.c).
I'm leaving out temperature sensors and charger in this submission,
because the former are not in use on Pixel 6 and I therefore can
not test them, and the latter can be added later, once we look at
the whole charging topic in more detail.
To make maintainers' work easier, I am planning to send the relevant
DTS and defconfig changes via a different series, unless everything
is expected to go via Lee's MFD tree in one series?
Cheers,
Andre'
Signed-off-by: André Draszik <andre.draszik@xxxxxxxxxx>
---
Changes in v3:
- collect tags
- mfd: drop gpio-controller and gpio-cells, GPIO is provided by the
child (Rob)
- gpio: drop duplicate init of 'handled' variable in irq handler
- gpio: use boolean with IRQ_RETVAL() (Linus)
- gpio: drop 'virq' variable inside irq handler to avoid confusion
(Linus)
- gpio: drop assignment of struct gpio_chip::owner (Linus)
- Link to v2: https://lore.kernel.org/r/20250226-max77759-mfd-v2-0-a65ebe2bc0a9@xxxxxxxxxx
Changes in v2:
- reorder bindings patches to avoid validation failures
- add dependency information to cover letter (Krzysztof)
- fix max77759_gpio_direction_from_control() in gpio driver
- gpio: drop 'interrupts' property from binding and sort properties
alphabetically (Rob)
- nvmem: drop example from nvmem binding as the MFD binding has a
complete one (Rob)
- nvmem: rename expected nvmem subdev nodename to 'nvmem-0' (Rob)
- mfd: add kernel doc
- mfd: fix an msec / usec typo
- mfd: error handling of devm_mutex_init (Christophe)
- whitespace fixes & tidy-ups (Christophe)
- Link to v1: https://lore.kernel.org/r/20250224-max77759-mfd-v1-0-2bff36f9d055@xxxxxxxxxx
---
André Draszik (6):
dt-bindings: gpio: add max77759 binding
dt-bindings: nvmem: add max77759 binding
dt-bindings: mfd: add max77759 binding
mfd: max77759: add Maxim MAX77759 core mfd driver
gpio: max77759: add Maxim MAX77759 gpio driver
nvmem: max77759: add Maxim MAX77759 NVMEM driver
.../bindings/gpio/maxim,max77759-gpio.yaml | 44 ++
.../devicetree/bindings/mfd/maxim,max77759.yaml | 99 +++
.../bindings/nvmem/maxim,max77759-nvmem.yaml | 32 +
MAINTAINERS | 10 +
drivers/gpio/Kconfig | 13 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-max77759.c | 524 +++++++++++++++
drivers/mfd/Kconfig | 20 +
drivers/mfd/Makefile | 1 +
drivers/mfd/max77759.c | 737 +++++++++++++++++++++
drivers/nvmem/Kconfig | 12 +
drivers/nvmem/Makefile | 2 +
drivers/nvmem/max77759-nvmem.c | 156 +++++
include/linux/mfd/max77759.h | 98 +++
14 files changed, 1749 insertions(+)
---
base-commit: 0226d0ce98a477937ed295fb7df4cc30b46fc304
change-id: 20250224-max77759-mfd-aaa7a3121b62
Best regards,
--
André Draszik <andre.draszik@xxxxxxxxxx>
