kernel/drivers/mfd, branch linux-6.6.y

mfd: core: Add locking around 'mfd_of_node_list'

2026-03-04T12:21:11Z

[ 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

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

2026-03-04T12:20:55Z

[ 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

2026-03-04T12:20:12Z

[ 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

mfd: simple-mfd-i2c: Keep compatible strings in alphabetical order

2026-03-04T12:20:11Z

[ Upstream commit 3ed50d77924ff2e35918739df145dd429cee0ce4 ] Reorder the of_device_id structures so that they are in alphabetical order. Signed-off-by: Ioana Ciornei Signed-off-by: Lee Jones Stable-dep-of: 8f34c1a64c53 ("mfd: simple-mfd-i2c: Add Delta TN48M CPLD support") Signed-off-by: Sasha Levin

mfd: simple-mfd-i2c: Add SpacemiT P1 support

2026-03-04T12:20:11Z

[ Upstream commit 6fc5d415c10e98ac1b31dd1d5653443e691cdcff ] Enable support for the RTC and regulators found in the SpacemiT P1 PMIC. Support is implemented by the simple I2C MFD driver. The P1 PMIC is normally implemented with the SpacemiT K1 SoC. This PMIC provides 6 buck converters and 12 LDO regulators. It also implements a switch, watchdog timer, real-time clock, and more. Initially its RTC and regulators are supported. Signed-off-by: Alex Elder Link: https://lore.kernel.org/r/20250825172057.163883-3-elder@riscstar.com Signed-off-by: Lee Jones Stable-dep-of: 8f34c1a64c53 ("mfd: simple-mfd-i2c: Add Delta TN48M CPLD support") Signed-off-by: Sasha Levin

mfd: simple-mfd-i2c: Add compatible strings for Layerscape QIXIS FPGA

2026-03-04T12:20:11Z

[ Upstream commit 81a2c31257411296862487aaade98b7d9e25dc72 ] The QIXIS FPGA found on Layerscape boards such as LX2160AQDS, LS1028AQDS etc deals with power-on-reset timing, muxing etc. Use the simple-mfd-i2c as its core driver by adding its compatible string (already found in some dt files). By using the simple-mfd-i2c driver, any child device will have access to the i2c regmap created by it. Signed-off-by: Ioana Ciornei Link: https://lore.kernel.org/r/20250707153120.1371719-1-ioana.ciornei@nxp.com Signed-off-by: Lee Jones Stable-dep-of: 8f34c1a64c53 ("mfd: simple-mfd-i2c: Add Delta TN48M CPLD support") Signed-off-by: Sasha Levin

mfd: simple-mfd-i2c: Add MAX77705 support

2026-03-04T12:20:11Z

[ Upstream commit 7b591ef98b3fc1ce20c3ccb86715429b72e2e6f0 ] Add MAX77705 support - fuel gauge and hwmon devices. Hwmon provides charger input and system bus measurements. Signed-off-by: Dzmitry Sankouski Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250123-starqltechn_integration_upstream-v17-4-8b06685b6612@gmail.com Signed-off-by: Lee Jones Stable-dep-of: 8f34c1a64c53 ("mfd: simple-mfd-i2c: Add Delta TN48M CPLD support") Signed-off-by: Sasha Levin

mfd: arizona: Fix regulator resource leak on wm5102_clear_write_sequencer() failure

2026-03-04T12:20:11Z

[ Upstream commit 4feb753ba6e5e5bbaba868b841a2db41c21e56fa ] The wm5102_clear_write_sequencer() helper may return an error and just return, bypassing the cleanup sequence and causing regulators to remain enabled, leading to a resource leak. Change the direct return to jump to the err_reset label to properly free the resources. Fixes: 1c1c6bba57f5 ("mfd: wm5102: Ensure we always boot the device fully") Signed-off-by: Haotian Zhang Reviewed-by: Charles Keepax Link: https://patch.msgid.link/20251214145804.2037-1-vulab@iscas.ac.cn Signed-off-by: Lee Jones Signed-off-by: Sasha Levin

mfd: max77620: Fix potential IRQ chip conflict when probing two devices

2026-01-11T14:22:13Z

commit 2bac49bad1f3553cc3b3bfb22cc194e9bd9e8427 upstream. MAX77620 is most likely always a single device on the board, however nothing stops board designers to have two of them, thus same device driver could probe twice. Or user could manually try to probing second time. Device driver is not ready for that case, because it allocates statically 'struct regmap_irq_chip' as non-const and stores during probe in 'irq_drv_data' member a pointer to per-probe state container ('struct max77620_chip'). devm_regmap_add_irq_chip() does not make a copy of 'struct regmap_irq_chip' but store the pointer. Second probe - either successful or failure - would overwrite the 'irq_drv_data' from previous device probe, so interrupts would be executed in a wrong context. Cc: stable@vger.kernel.org Fixes: 3df140d11c6d ("mfd: max77620: Mask/unmask interrupt before/after servicing it") Signed-off-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20251023101939.67991-2-krzysztof.kozlowski@linaro.org Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman

mfd: altera-sysmgr: Fix device leak on sysmgr regmap lookup

2026-01-11T14:22:13Z

commit ccb7cd3218e48665f3c7e19eede0da5f069c323d upstream. Make sure to drop the reference taken to the sysmgr platform device when retrieving its driver data. Note that holding a reference to a device does not prevent its driver data from going away. Fixes: f36e789a1f8d ("mfd: altera-sysmgr: Add SOCFPGA System Manager") Cc: stable@vger.kernel.org # 5.2 Signed-off-by: Johan Hovold Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman