talos-obmc-linux/include/linux/gpio/machine.h, branch dev-4.13-fsi

gpio: gpiolib: Generalise state persistence beyond sleep

2018-02-08T06:04:00+00:00

General support for state persistence is added to gpiolib with the introduction of a new pinconf parameter to propagate the request to hardware. The existing persistence support for sleep is adapted to include hardware support if the GPIO driver provides it. Persistence continues to be enabled by default; in-kernel consumers can opt out, but userspace (currently) does not have a choice. The *_SLEEP_MAY_LOSE_VALUE and *_SLEEP_MAINTAIN_VALUE symbols are renamed, dropping the SLEEP prefix to reflect that the concept is no longer sleep-specific. I feel that renaming to just *_MAY_LOSE_VALUE could initially be misinterpreted, so I've further changed the symbols to *_TRANSITORY and *_PERSISTENT to address this. The sysfs interface is modified only to keep consistency with the chardev interface in enforcing persistence for userspace exports. Signed-off-by: Andrew Jeffery Reviewed-by: Charles Keepax Acked-by: Rob Herring Signed-off-by: Linus Walleij (cherry picked from commit e10f72bf4b3e8885c1915a119141481e7fc45ca8) Signed-off-by: Joel Stanley

Merge tag 'gpio-v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2017-07-07T19:40:27+00:00

Pull GPIO updates from Linus Walleij: "This is the bulk of GPIO changes for the v4.13 series. Some administrativa: I have a slew of 8250 serial patches and the new IOT2040 serial+GPIO driver coming in through this tree, along with a whole bunch of Exar 8250 fixes. These are ACKed by Greg and also hit drivers/platform/* where they are ACKed by Andy Shevchenko. Speaking about drivers/platform/* there is also a bunch of ACPI stuff coming through that route, again ACKed by Andy. The MCP23S08 changes are coming in here as well. You already have the commits in your tree, so this is just a result of sharing an immutable branch between pin control and GPIO. Core: - Export add/remove for lookup tables so that modules can export GPIO descriptor tables. - Handle GPIO sleep states: it is now possible to flag that a GPIO line may loose its state during suspend/resume of the system to save power. This is used in the Wolfson Micro Arizona driver. - ACPI-based GPIO was tightened up a lot around the edges. - Use bitmap_fill() to speed up a loop. New drivers: - Exar XRA1403 SPI-based GPIO. - MVEBU driver now supports Armada 7K and 8K. - LP87565 PMIC GPIO. - Renesas R-CAR R8A7743 (RZ/G1M). - The new IOT2040 8250 serial/GPIO also comes in through this changeset. Substantial driver changes: - Seriously fix the Exar 8250 GPIO portions to work. - The MCP23S08 was moved out to a pin control driver. - Convert MEVEBU to use regmap for register access. - Drop Vulcan support from the Broadcom driver. - Serious cleanup and improvement of the mockup driver, giving us a better test coverage. Misc: - Lots of janitorial clean up. - A bunch of documentation fixes" * tag 'gpio-v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (70 commits) serial: exar: Add support for IOT2040 device gpio-exar/8250-exar: Make set of exported GPIOs configurable platform: Accept const properties serial: exar: Factor out platform hooks gpio-exar/8250-exar: Rearrange gpiochip parenthood gpio: exar: Fix iomap request gpio-exar/8250-exar: Do not even instantiate a GPIO device for Commtech cards serial: uapi: Add support for bus termination gpio: rcar: Add R8A7743 (RZ/G1M) support gpio: gpio-wcove: Fix GPIO control register offset calculation gpio: lp87565: Add support for GPIO gpio: dwapb: fix missing first irq for edgeboth irq type MAINTAINERS: Take maintainership for GPIO ACPI support gpio: exar: Fix reading of directions and values gpio: exar: Allocate resources on behalf of the platform device gpio-exar/8250-exar: Fix passing in of parent PCI device gpio: mockup: use devm_kcalloc() where applicable gpio: mockup: add myself as author gpio: mockup: improve the error message gpio: mockup: don't return magic numbers from probe() ...

gpio: Add new flags to control sleep status of GPIOs

2017-05-29T09:07:55+00:00

Add new flags to allow users to specify that they are not concerned with the status of GPIOs whilst in a sleep/low power state. Signed-off-by: Charles Keepax Acked-by: Rob Herring Signed-off-by: Linus Walleij

gpiolib: Add stubs for gpiod lookup table interface

2017-05-22T08:39:11+00:00

Add stubs for gpiod_add_lookup_table() and gpiod_remove_lookup_table() for the !GPIOLIB case to prevent build errors. Signed-off-by: Anatolij Gustschin Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij

gpiolib: Add support for removing registered consumer lookup table

2015-07-21T07:21:40+00:00

In case we unload and load a driver module again that is registering a lookup table, without this it will result in multiple entries. Provide an option to remove the lookup table on driver unload Cc: Samuel Ortiz Cc: Linus Walleij Cc: Alexandre Courbot Cc: Thierry Reding Reviewed-by: Alexandre Courbot Reviewed-by: Linus Walleij Tested-by: Ville Syrjälä Signed-off-by: Shobhit Kumar Acked-by: Lee Jones Signed-off-by: Daniel Vetter

gpio: add missing includes in machine.h

2014-08-07T09:54:51+00:00

linux/types.h and linux/list.h should be included so the typed used in the header file are always properly declared. Reported-by: Stephen Rothwell Reported-by: Thierry Reding Signed-off-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpio: split gpiod board registration into machine header

2014-07-28T10:23:35+00:00

As per example from the regulator subsystem: put all defines and functions related to registering board info for GPIO descriptors into a separate header. Cc: Andrew Victor Cc: Nicolas Ferre Cc: Jean-Christophe Plagniol-Villard Cc: Ralf Baechle Cc: Thierry Reding Acked-by: Stephen Warren Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij