kernel/linux.git/drivers/mfd/intel-lpss.h, branch linux-7.1.y

mfd: intel-lpss: Introduce QUIRK_CLOCK_DIVIDER_UNITY for XPS 9530

2024-02-23T14:58:00+00:00

Some devices (eg. Dell XPS 9530, 2023) due to a firmware bug have a misconfigured clock divider, which should've been 1:1. This introduces quirk which conditionally re-configures the clock divider to 1:1. Signed-off-by: Aleksandrs Vinarskis Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231221185142.9224-3-alex.vinarskis@gmail.com Signed-off-by: Lee Jones

mfd: intel-lpss: Switch to generalized quirk table

2024-02-23T14:58:00+00:00

Introduce generic quirk table, and port existing walkaround for select Microsoft devices to it. This is a preparation for QUIRK_CLOCK_DIVIDER_UNITY. Signed-off-by: Aleksandrs Vinarskis Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231221185142.9224-2-alex.vinarskis@gmail.com Signed-off-by: Lee Jones

mfd: intel-lpss: Provide Intel LPSS PM ops structure

2023-12-07T13:50:29+00:00

With the help of EXPORT_NS_GPL_DEV_PM_OPS() and other *_PM_OPS() macros we may convert PM ops functions to become static. This also takes into account the PM configuration options such as CONFIG_PM and CONFIG_PM_SLEEP. This all removes a lot of ugly macros and ifdeffery in the driver. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231124200258.3682979-6-andriy.shevchenko@linux.intel.com Signed-off-by: Lee Jones

mfd: intel-lpss: Fix I2C4 not being available on the Microsoft Surface Go & Go 2

2021-12-29T13:17:01+00:00

Many DSDTs for Kaby Lake and Kaby Lake Refresh models contain a _SB.PCI0.GEXP ACPI Device node describing an I2C attached PCA953x GPIO expander. This seems to be something which is copy and pasted from the DSDT from some reference design since this ACPI Device is present even on models where no such GPIO expander is used at all, such as on the Microsoft Surface Go & Go 2. This ACPI Device is a problem because it contains a SystemMemory OperationRegion which covers the MMIO for the I2C4 I2C controller. This causes the MFD cell for the I2C4 controller to not be instantiated due to a resource conflict, requiring the use of acpi_enforce_resources=lax to work around this. I have done an extensive analysis of all the ACPI tables on the Microsoft Surface Go and the _SB.PCI0.GEXP ACPI Device's methods are not used by any code in the ACPI tables, neither are any of them directly called by any Linux kernel code. This is unsurprising since running i2cdetect on the I2C4 bus shows that there is no GPIO expander chip present on these devices at all. This commit adds a PCI subsystem vendor:device table listing PCI devices where it is known to be safe to ignore resource conflicts with ACPI declared SystemMemory regions. This makes the I2C4 bus work out of the box on the Microsoft Surface Go & Go 2, which is necessary for the cameras on these devices to work. Signed-off-by: Hans de Goede Reviewed-by: Laurent Pinchart Reviewed-by: Andy Shevchenko Acked-by: Mika Westerberg Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20211203115108.89661-1-hdegoede@redhat.com

mfd: intel-lpss: Switch to use the software nodes

2021-04-14T15:06:11+00:00

Software node was always created for the device if it was supplied with additional device properties, so those nodes might as well be constant. Signed-off-by: Heikki Krogerus Signed-off-by: Andy Shevchenko Signed-off-by: Lee Jones

mfd: intel-lpss: Constify device property structures

2021-04-14T15:06:09+00:00

There is no point to have non-constant device properties in this driver. Thus, constify them for good. Signed-off-by: Andy Shevchenko Signed-off-by: Lee Jones

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

mfd: intel-lpss: Move linux/pm.h to the local header

2019-02-18T09:06:52+00:00

We now using a common macro for PM operations in Intel LPSS driver, and, since that macro relies on the definition and macro from linux/pm.h header file, it's logical to include it directly in intel-lpss.h. Otherwise it's a bit fragile and requires a proper ordering of header inclusion in C files. Signed-off-by: Andy Shevchenko Acked-by: Mika Westerberg Signed-off-by: Lee Jones

PM / mfd: intel-lpss: Push system sleep callbacks to late/early stages

2017-10-05T10:59:54+00:00

Push the system suspend/resume callbacks of intel-lpss to the late suspend/early resume stages to allow child device callbacks to be pushed to the late/early stages of suspend/resume too, so as to make it possible to avoid resuming the children if they are runtime- suspended during system suspend going forward. Signed-off-by: Rafael J. Wysocki Tested-by: Jarkko Nikula Tested-by: Mika Westerberg Tested-by: Johannes Stezenbach Tested-by: Rajat Jain Acked-by: Lee Jones Signed-off-by: Wolfram Sang

device property: don't bother the drivers with struct property_set

2016-04-09T01:10:50+00:00

Since device_add_property_set() now always takes a copy of the property_set, and also since the fwnode type is always hard coded to be FWNODE_PDATA, there is no need for the drivers to deliver the entire struct property_set. The function can just create the instance of it on its own and bind the properties from the drivers to it on the spot. This renames device_add_property_set() to device_add_properties(). The function now takes struct property_entry as its parameter instead of struct property_set. Reviewed-by: Andy Shevchenko Reviewed-by: Mika Westerberg Acked-by: Thierry Reding Acked-by: Lee Jones Signed-off-by: Heikki Krogerus Signed-off-by: Rafael J. Wysocki