linux-stable.git/drivers/mfd/Makefile, branch v6.17

mfd: Add Apple Silicon System Management Controller

2025-07-24T08:47:33+00:00

The System Management Controller (SMC) on Apple Silicon machines is a
piece of hardware that exposes various functionalities such as
temperature sensors, voltage/power meters, shutdown/reboot handling,
GPIOs and more.

Communication happens via a shared mailbox using the RTKit protocol
which is also used for other co-processors. The SMC protocol then allows
reading and writing many different keys which implement the various
features. The MFD core device handles this protocol and exposes it
to the sub-devices.

Some of the sub-devices are potentially also useful on pre-M1 Apple
machines and support for SMCs on these machines can be added at a later
time.

Co-developed-by: Hector Martin 
Signed-off-by: Hector Martin 
Reviewed-by: Alyssa Rosenzweig 
Reviewed-by: Neal Gompa 
Signed-off-by: Sven Peter 
Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-5-556cafd771d3@kernel.org
Signed-off-by: Lee Jones

mfd: sec: Merge separate core and irq modules

2025-05-23T07:48:34+00:00

There is no reason to have these two kernel modules separate. Having
them merged into one kernel module also slightly reduces memory
consumption and module load times a little.

mapped size (lsmod):
         before:             after:
    sec_core   20480    sec_core   24576
    sec_irq    16384
    ----------------
    total      36864

Section sizes (size -A):
         before:             after:
    sec_core    6780    sec_core   13239
    sec_irq     8046
    ----------------
    Total      14826

Reviewed-by: Krzysztof Kozlowski 
Signed-off-by: André Draszik 
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-10-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones

mfd: sec: Add support for S2MPG10 PMIC

2025-05-23T07:48:27+00:00

Add support for Samsung's S2MPG10 PMIC, which is a Power Management IC
for mobile applications with buck converters, various LDOs, power
meters, RTC, clock outputs, and additional GPIOs interfaces.

Contrary to existing Samsung S2M series PMICs supported, communication
is not via I2C, but via the Samsung ACPM firmware.

This commit adds the core driver.

Signed-off-by: André Draszik 
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-9-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones

mfd: sec: Split into core and transport (i2c) drivers

2025-05-23T07:48:23+00:00

As a preparation for adding support for Samsung's S2MPG10, which is
connected via SPEEDY / ACPM rather than I2C, split out (move) all
I2C-specific driver code into its own kernel module, sec-i2c, and
make the existing sec-core module be just the transport-agnostic core
driver kernel module.

At the same time, update all defconfigs that reference the old kconfig
symbol name.

While at it, also update file header comments and module description(s)
to drop references to 'mfd', and update comments to be C-style, not
C++.

Reviewed-by: Krzysztof Kozlowski 
Signed-off-by: André Draszik 
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-8-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones

mfd: max77759: Add Maxim MAX77759 core driver

2025-05-09T14:22:30+00:00

The Maxim MAX77759 is a companion PMIC for USB Type-C applications and
includes Battery Charger, Fuel Gauge, temperature sensors, USB Type-C
Port Controller (TCPC), NVMEM, and a GPIO expander.

Fuel Gauge and TCPC have separate and independent I2C addresses,
register maps, and interrupt lines and are therefore excluded from the
MFD core device driver here.

The GPIO and NVMEM interfaces are accessed via specific commands to the
built-in microprocessor. This driver implements an API that client
drivers can use for accessing those.

Signed-off-by: André Draszik 
Acked-by: Peter Griffin 
Link: https://lore.kernel.org/r/20250509-max77759-mfd-v10-1-962ac15ee3ef@linaro.org
Signed-off-by: Lee Jones

mfd: pcf50633: Remove remaining PCF50633 support

2025-03-14T11:42:51+00:00

Remove the remaining parts of the 50633, the core, headers and glue.

The pcf50633 was used as part of the OpenMoko devices but
the support for its main chip was recently removed in:
commit 61b7f8920b17 ("ARM: s3c: remove all s3c24xx support")

See https://lore.kernel.org/all/Z8z236h4B5A6Ki3D@gallifrey/

Remove it.

Signed-off-by: "Dr. David Alan Gilbert" 
Link: https://lore.kernel.org/r/20250311014959.743322-10-linux@treblig.org
Signed-off-by: Lee Jones

mfd: pcf50633: Remove unused platform IRQ code

2025-03-14T11:42:40+00:00

As part of the pcf50633 removal, take out it's irq code
(which includes one bit still called from the core, but it'll
go soon).

Signed-off-by: "Dr. David Alan Gilbert" 
Link: https://lore.kernel.org/r/20250311014959.743322-9-linux@treblig.org
Signed-off-by: Lee Jones

mfd: pcF50633-gpio: Remove unused driver

2025-03-14T11:42:35+00:00

The pcf50633 was used as part of the OpenMoko devices but
the support for its main chip was recently removed in:
commit 61b7f8920b17 ("ARM: s3c: remove all s3c24xx support")

See https://lore.kernel.org/all/Z8z236h4B5A6Ki3D@gallifrey/

Remove it.

Signed-off-by: "Dr. David Alan Gilbert" 
Acked-by: Linus Walleij 
Acked-by: Arnd Bergmann 
Link: https://lore.kernel.org/r/20250311014959.743322-4-linux@treblig.org
Signed-off-by: Lee Jones

mfd: pcf50633-adc: Remove unused driver

2025-03-14T11:42:26+00:00

The pcf50633 was used as part of the OpenMoko devices but
the support for its main chip was recently removed in:
commit 61b7f8920b17 ("ARM: s3c: remove all s3c24xx support")

See https://lore.kernel.org/all/Z8z236h4B5A6Ki3D@gallifrey/

Remove it.

Signed-off-by: "Dr. David Alan Gilbert" 
Link: https://lore.kernel.org/r/20250311014959.743322-2-linux@treblig.org
Signed-off-by: Lee Jones

mfd: Remove STA2x11 core driver

2025-03-14T08:59:07+00:00

With commit dcbb01fbb7ae ("x86/pci: Remove old STA2x11 support"), the core
driver for STA2x11 is not needed and cannot be built anymore.

Remove the driver and its header file.

Signed-off-by: Lukas Bulwahn 
Acked-by: Arnd Bergmann 
Link: https://lore.kernel.org/r/20250303100055.372689-1-lukas.bulwahn@redhat.com
Signed-off-by: Lee Jones