kernel/linux.git/include/linux/mfd/samsung, branch v7.0-rc7

regulator: s2mps11: add S2MPG10 regulator

2026-02-04T13:35:37+00:00

The S2MPG10 PMIC is a Power Management IC for mobile applications with buck converters, various LDOs, power meters, RTC, clock outputs, and additional GPIO interfaces. It has 10 buck and 31 LDO rails. Several of these can either be controlled via software (register writes) or via external signals, in particular by: * one out of several input pins connected to a main processor's: * GPIO pins * other pins that are e.g. firmware- or power-domain-controlled without explicit driver intervention * a combination of input pins and register writes. Control via input pins allows PMIC rails to be controlled by firmware, e.g. during standby/suspend, or as part of power domain handling where otherwise that would not be possible. Additionally toggling a pin is faster than register writes, and it also allows the PMIC to ensure that any necessary timing requirements between rails are respected automatically if multiple rails are to be enabled or disabled quasi simultaneously. This commit implements support for all these rails and control combinations. Additional data needs to be stored for each regulator, e.g. the input pin for external control, or a rail-specific ramp-rate for when enabling a buck-rail. Therefore, probe() is updated slightly to make that possible. Note1: For an externally controlled rail, the regulator_ops provide an empty ::enable() and no ::disable() implementations, even though Linux can not enable the rail and one might think ::enable could be NULL. Without ops->enable(), the regulator core will assume enabling such a rail failed, though, and in turn never add a reference to its parent (supplier) rail. Once a different (Linux-controlled) sibling (consumer) rail on that same parent rail gets disabled, the parent gets disabled (cutting power to the externally controlled rail although it should stay on), and the system will misbehave. Note2: While external control via input pins appears to exist on other versions of this PMIC, there is more flexibility in this version, in particular there is a selection of input pins to choose from for each rail (which must therefore be configured accordingly if in use), whereas other versions don't have this flexibility. Signed-off-by: André Draszik Link: https://patch.msgid.link/20260122-s2mpg1x-regulators-v7-16-3b1f9831fffd@linaro.org Signed-off-by: Mark Brown

mfd: sec: Add support for S2MPG11 PMIC via ACPM

2026-02-04T10:37:29+00:00

Add support for Samsung's S2MPG11 PMIC, which is a Power Management IC for mobile applications with buck converters, various LDOs, power meters, NTC thermistor inputs, and additional GPIO interfaces. It typically complements an S2MPG10 PMIC in a main/sub configuration as the sub-PMIC. Like S2MPG10, communication is not via I2C, but via the Samsung ACPM firmware. While at it, we can also switch to asynchronous probe, which helps with probe performance, as the drivers for s2mpg10 and s2mpg11 can probe in parallel. Note: The firmware uses the ACPM channel ID and the Speedy channel ID to select the PMIC address. Since these are firmware properties, they can not be retrieved from DT, but instead are deducted from the compatible for now. Signed-off-by: André Draszik Link: https://patch.msgid.link/20260122-s2mpg1x-regulators-v7-9-3b1f9831fffd@linaro.org Signed-off-by: Lee Jones

mfd: sec: s2mpg10: Reorder regulators for better probe performance

2026-02-04T10:37:09+00:00

Bucks can reasonably be supplies for LDOs, but not the other way around. Since rail registration is going to be ordered by 'enum s2mpg10_regulators', it makes sense to specify bucks first, so that during LDO registration it is more likely that the corresponding supply is known already. This can improve probe speed, as no unnecessary deferrals and retries are required anymore. Signed-off-by: André Draszik Link: https://patch.msgid.link/20260122-s2mpg1x-regulators-v7-8-3b1f9831fffd@linaro.org Signed-off-by: Lee Jones

mfd: sec: Drop now unused struct sec_pmic_dev::irq_data

2026-01-20T15:37:48+00:00

This was used only to allow the s5m RTC driver to deal with the alarm IRQ. That driver now uses a different approach to acquire that IRQ, and ::irq_data doesn't need to be kept around anymore. Signed-off-by: André Draszik Link: https://patch.msgid.link/20260113-s5m-alarm-v3-3-855a19db1277@linaro.org Signed-off-by: Lee Jones

mfd: sec: Use chained IRQs for s2mpg10

2025-11-20T10:29:20+00:00

On S2MPG10 (and similar like S2MPG11), top-level interrupt status and mask registers exist which need to be unmasked to get the PMIC interrupts. This additional status doesn't seem to exist on other PMICs in the S2MP* family, and the S2MPG10 driver is manually dealing with masking and unmasking currently. The correct approach here is to register this hierarchy as chained interrupts, though, without any additional manual steps. Doing so will also simplify addition of other, similar, PMICs (like S2MPG11) in the future. Update the driver to do just that. Signed-off-by: André Draszik Link: https://patch.msgid.link/20251114-s2mpg10-chained-irq-v1-1-34ddfa49c4cd@linaro.org Signed-off-by: Lee Jones

mfd: sec: Change device_type to int

2025-05-23T07:48:44+00:00

Now that sec-i2c doesn't match device type by pointer casting anymore, we can switch the device type from unsigned long to int easily. This saves a few bytes in struct sec_pmic_dev due to member alignment. Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-18-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: Move private internal API to internal header

2025-05-23T07:48:22+00:00

sec_irq_init() is an internal API for the core driver, and doesn't belong into the public header. Due to an upcoming split of the driver into a core and i2c driver, we'll also be adding more internal APIs, which again shouldn't be in the public header. Move it into a new internal include. Reviewed-by: Krzysztof Kozlowski Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-7-d66d5f39b6bf@linaro.org Signed-off-by: Lee Jones

mfd: sec-core: Drop non-existing forward declarations

2025-05-23T07:48:18+00:00

sec_irq_resume() was removed in commit 6445b84abf91 ("mfd: Add s2mps11 irq driver") and sec_irq_exit() in commit 3dc6f4aaafbe ("mfd: sec: Use devm_mfd_add_devices and devm_regmap_add_irq_chip") while the prototypes were left. They should be removed. Do so. Reviewed-by: Krzysztof Kozlowski Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-4-d66d5f39b6bf@linaro.org Signed-off-by: Lee Jones

mfd: sec: Add support for S2MPU05 PMIC

2025-03-13T12:38:45+00:00

Add support for Samsung's S2MPU05 PMIC. It's the primary PMIC used by Exynos7870 devices. It houses regulators (21 LDOs and 5 BUCKs) and a RTC clock device. Signed-off-by: Kaustabh Chakraborty Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250301-exynos7870-pmic-regulators-v3-2-808d0b47a564@disroot.org Signed-off-by: Lee Jones