linux-stable.git/drivers/mfd, branch v6.18.27

mfd: core: Preserve OF node when ACPI handle is present

2026-05-07T04:11:56+00:00

commit caa5a5d44d8ae4fd13b744857d66c9313b712d1f upstream.

Switch device_set_node to set_primary_fwnode, so that the ACPI fwnode
does not overwrite the of_node with NULL.

This allows MFD children with both OF nodes and ACPI handles to have OF
nodes again.

Cc: stable@vger.kernel.org
Fixes: 51e3b257099d ("mfd: core: Make use of device_set_node()")
Signed-off-by: Brian Mak 
Reviewed-by: Andy Shevchenko 
Link: https://patch.msgid.link/20260325223024.35992-1-makb@juniper.net
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: stpmic1: Attempt system shutdown twice in case PMIC is confused

2026-05-07T04:11:39+00:00

commit ffdc5c51f8bcd0e5e8255ca275a0a3b958475d99 upstream.

Attempt to shut down again, in case the first attempt failed.
The STPMIC1 might get confused and the first regmap_update_bits()
returns with -ETIMEDOUT / -110 . If that or similar transient
failure occurs, try to shut down again. If the second attempt
fails, there is some bigger problem, report it to user.

Cc: stable@vger.kernel.org
Fixes: 6e9df38f359a ("mfd: stpmic1: Add PMIC poweroff via sys-off handler")
Signed-off-by: Marek Vasut 
Link: https://patch.msgid.link/20260122111423.62591-1-marex@nabladev.com
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: omap-usb-host: Fix OF populate on driver rebind

2026-03-04T12:21:13+00:00

[ Upstream commit 24804ba508a3e240501c521685a1c4eb9f574f8e ]

Since commit c6e126de43e7 ("of: Keep track of populated platform
devices") child devices will not be created by of_platform_populate()
if the devices had previously been deregistered individually so that the
OF_POPULATED flag is still set in the corresponding OF nodes.

Switch to using of_platform_depopulate() instead of open coding so that
the child devices are created if the driver is rebound.

Fixes: c6e126de43e7 ("of: Keep track of populated platform devices")
Cc: stable@vger.kernel.org	# 3.16
Signed-off-by: Johan Hovold 
Reviewed-by: Andreas Kemnade 
Link: https://patch.msgid.link/20251219110714.23919-1-johan@kernel.org
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: qcom-pm8xxx: Fix OF populate on driver rebind

2026-03-04T12:21:13+00:00

[ Upstream commit 27a8acea47a93fea6ad0e2df4c20a9b51490e4d9 ]

Since commit c6e126de43e7 ("of: Keep track of populated platform
devices") child devices will not be created by of_platform_populate()
if the devices had previously been deregistered individually so that the
OF_POPULATED flag is still set in the corresponding OF nodes.

Switch to using of_platform_depopulate() instead of open coding so that
the child devices are created if the driver is rebound.

Fixes: c6e126de43e7 ("of: Keep track of populated platform devices")
Cc: stable@vger.kernel.org	# 3.16
Signed-off-by: Johan Hovold 
Reviewed-by: Dmitry Baryshkov 
Reviewed-by: Konrad Dybcio 
Link: https://patch.msgid.link/20251219110947.24101-1-johan@kernel.org
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: macsmc: Initialize mutex

2026-03-04T12:21:12+00:00

[ Upstream commit 414f65d6736342c77d4ec5e7373039f4a09250dd ]

Initialize struct apple_smc's mutex in apple_smc_probe(). Using the
mutex uninitialized surprisingly resulted only in occasional NULL
pointer dereferences in apple_smc_read() calls from the probe()
functions of sub devices.

Cc: stable@vger.kernel.org
Fixes: e038d985c9823 ("mfd: Add Apple Silicon System Management Controller")
Signed-off-by: Janne Grunau 
Reviewed-by: Sven Peter 
Reviewed-by: Neal Gompa 
Link: https://patch.msgid.link/20251231-macsmc-mutex_init-v2-1-5818c9dc9b29@jannau.net
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: tps65219: Implement LOCK register handling for TPS65214

2026-03-04T12:21:12+00:00

[ Upstream commit d3fcf276b501a82d4504fd5b1ed40249546530d1 ]

The TPS65214 PMIC variant has a LOCK_REG register that prevents writes to
nearly all registers when locked. Unlock the registers at probe time and
leave them unlocked permanently.

This approach is justified because:
- Register locking is very uncommon in typical system operation
- No code path is expected to lock the registers during runtime
- Adding a custom regmap write function would add overhead to every
  register write, including voltage changes triggered by CPU OPP
  transitions from the cpufreq governor which could happen quite
  frequently

Cc: stable@vger.kernel.org
Fixes: 7947219ab1a2d ("mfd: tps65219: Add support for TI TPS65214 PMIC")
Reviewed-by: Andrew Davis 
Signed-off-by: Kory Maincent (TI.com) 
Link: https://patch.msgid.link/20251218-fix_tps65219-v5-1-8bb511417f3a@bootlin.com
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: core: Add locking around 'mfd_of_node_list'

2026-03-04T12:21:12+00:00

[ Upstream commit 20117c92bcf9c11afd64d7481d8f94fdf410726e ]

Manipulating a list in the kernel isn't safe without some sort of
mutual exclusion. Add a mutex any time we access / modify
'mfd_of_node_list' to prevent possible crashes.

Cc: stable@vger.kernel.org
Fixes: 466a62d7642f ("mfd: core: Make a best effort attempt to match devices with the correct of_nodes")
Signed-off-by: Douglas Anderson 
Link: https://patch.msgid.link/20251210113002.1.I6ceaca2cfb7eb25737012b166671f516696be4fd@changeid
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: intel-lpss: Add Intel Nova Lake-S PCI IDs

2026-03-04T12:20:36+00:00

[ Upstream commit cefd793fa17de708d043adab50e7f96f414b0f1d ]

Add Intel Nova Lake-S LPSS PCI IDs.

Signed-off-by: Ilpo Järvinen 
Acked-by: Andy Shevchenko 
Link: https://patch.msgid.link/20260113172151.48062-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

Revert "mfd: da9052-spi: Change read-mask to write-mask"

2026-03-04T12:20:36+00:00

[ Upstream commit 12daa9c1954542bf98bb942fb2dadf19de79a44b ]

This reverts commit 2e3378f6c79a1b3f7855ded1ef306ea4406352ed.

Almost every register in this chip can be customized via OTP
memory. Somehow the value for R19, which decide if the flag is set
on read or write operation, seems to have been overwritten for the chip
the original patch were written for.

Revert the change to follow the default behavior.

Signed-off-by: Marcus Folkesson 
Link: https://patch.msgid.link/20251124-da9052-revert-v1-1-fbeb2c894002@gmail.com
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin

mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

2026-02-26T22:59:34+00:00

[ Upstream commit 8f34c1a64c5394d2b51d3fba197947dc4b0b48a0 ]

Delta TN48M switches have a Lattice CPLD that serves
multiple purposes including being a GPIO expander.

So, lets use the simple I2C MFD driver to provide the MFD core.

Also add a virtual symbol which pulls in the simple-mfd-i2c driver and
provide a common symbol on which the subdevice drivers can depend on.

Fixes: b3dcb5de6209 ("gpio: Add Delta TN48M CPLD GPIO driver")
Signed-off-by: Robert Marko 
Link: https://lore.kernel.org/20220131133049.77780-2-robert.marko@sartura.hr
Link: https://lore.kernel.org/linux-gpio/20260112064950.3837737-1-rdunlap@infradead.org/
Signed-off-by: Linus Walleij 
Link: https://patch.msgid.link/20260112-mfd-tn48m-v11-1-00c798d8cd2a@kernel.org
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin