kernel/linux.git/drivers/gpio/Kconfig, branch v6.12.80

gpio: adp5585: Add Analog Devices ADP5585 support

2024-08-01T13:09:28+00:00

The ADP5585 is a 10/11 input/output port expander with a built in keypad matrix decoder, programmable logic, reset generator, and PWM generator. This driver supports the GPIO function using the platform device registered by the core MFD driver. The driver is derived from an initial implementation from NXP, available in commit 451f61b46b76 ("MLK-25917-2 gpio: adp5585-gpio: add adp5585-gpio support") in their BSP kernel tree. It has been extensively rewritten. Signed-off-by: Haibo Chen Reviewed-by: Linus Walleij Acked-by: Bartosz Golaszewski Co-developed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart Reviewed-by: Frank Li Link: https://lore.kernel.org/r/20240722121100.2855-4-laurent.pinchart@ideasonboard.com Signed-off-by: Lee Jones

Merge tag 'gpio-updates-for-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

2024-07-16T00:53:24+00:00

Pull gpio updates from Bartosz Golaszewski: "The majority of added lines are two new modules: the GPIO virtual consumer module that improves our ability to add automated tests for the kernel API and the "sloppy" logic analyzer module that uses the GPIO API to implement a coarse-grained debugging tool for useful for remote development. Other than that we have the usual assortment of various driver extensions, improvements to the core GPIO code, DT-bindings and other documentation updates as well as an extension to the interrupt simulator: GPIOLIB core: - rework kfifo handling rework in the character device code - improve the labeling of GPIOs requested as interrupts and show more info on interrupt-only GPIOs in debugfs - remove unused APIs - unexport interfaces that are only used from the core GPIO code - drop the return value from gpiochip_set_desc_names() as it cannot fail - move a string array definition out of a header and into a specific compilation unit - convert the last user of gpiochip_get_desc() other than GPIO core to using a safer alternative - use array_index_nospec() where applicable New drivers: - add a "virtual GPIO consumer" module that allows requesting GPIOs from actual hardware and driving tests of the in-kernel GPIO API from user-space over debugfs - add a GPIO-based "sloppy" logic analyzer module useful for "first glance" debugging on remote boards Driver improvements: - add support for a new model to gpio-pca953x - lock GPIOs as interrupts in gpio-sim when the lines are requested as irqs via the simulator domain + some other minor improvements - improve error reporting in gpio-syscon - convert gpio-ath79 to using dynamic GPIO base and range - use pcibios_err_to_errno() for converting PCIBIOS error codes to errno vaues in gpio-amd8111 and gpio-rdc321x - allow building gpio-brcmstb for the BCM2835 architecture DT bindings: - convert DT bindings for lsi,zevio, mpc8xxx, and atmel to DT schema - document new properties for aspeed,gpio, fsl,qoriq-gpio and gpio-vf610 - document new compatibles for pca953x and fsl,qoriq-gpio Documentation: - document stricter behavior of the GPIO character device uAPI with regards to reconfiguring requested line without direction set - clarify the effect of the active-low flag on line values and edges - remove documentation for the legacy GPIO API in order to stop tempting people to use it - document the preference for using pread() for reading edge events in the sysfs API Other: - add an extended initializer to the interrupt simulator allowing to specify a number of callbacks callers can use to be notified about irqs being requested and released" * tag 'gpio-updates-for-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (41 commits) gpio: mc33880: Convert comma to semicolon gpio: virtuser: actually use the "trimmed" local variable dt-bindings: gpio: convert Atmel GPIO to json-schema gpio: virtuser: new virtual testing driver for the GPIO API dt-bindings: gpio: vf610: Allow gpio-line-names to be set gpio: sim: lock GPIOs as interrupts when they are requested genirq/irq_sim: add an extended irq_sim initializer dt-bindings: gpio: fsl,qoriq-gpio: Add compatible string fsl,ls1046a-gpio gpiolib: unexport gpiochip_get_desc() gpio: add sloppy logic analyzer using polling Documentation: gpio: Reconfiguration with unset direction (uAPI v2) Documentation: gpio: Reconfiguration with unset direction (uAPI v1) dt-bindings: gpio: fsl,qoriq-gpio: add common property gpio-line-names gpio: ath79: convert to dynamic GPIO base allocation pinctrl: da9062: replace gpiochip_get_desc() with gpio_device_get_desc() gpiolib: put gpio_suffixes in a single compilation unit Documentation: gpio: Clarify effect of active low flag on line edges Documentation: gpio: Clarify effect of active low flag on line values gpiolib: Remove data-less gpiochip_add() function gpio: sim: use devm_mutex_init() ...

gpio: virtuser: new virtual testing driver for the GPIO API

2024-07-09T07:39:54+00:00

The GPIO subsystem used to have a serious problem with undefined behavior and use-after-free bugs on hot-unplug of GPIO chips. This can be considered a corner-case by some as most GPIO controllers are enabled early in the boot process and live until the system goes down but most GPIO drivers do allow unbind over sysfs, many are loadable modules that can be (force) unloaded and there are also GPIO devices that can be dynamically detached, for instance CP2112 which is a USB GPIO expender. Bugs can be triggered both from user-space as well as by in-kernel users. We have the means of testing it from user-space via the character device but the issues manifest themselves differently in the kernel. This is a proposition of adding a new virtual driver - a configurable GPIO consumer that can be configured over configfs (similarly to gpio-sim) or described on the device-tree. This driver is aimed as a helper in spotting any regressions in hot-unplug handling in GPIOLIB. Link: https://lore.kernel.org/r/20240708142912.120570-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

gpio: add sloppy logic analyzer using polling

2024-07-01T08:54:11+00:00

This is a sloppy logic analyzer using GPIOs. It comes with a script to isolate a CPU for polling. While this is definitely not a production level analyzer, it can be a helpful first view when remote debugging. Read the documentation for details. Signed-off-by: Wolfram Sang Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20240620094159.6785-2-wsa+renesas@sang-engineering.com [Bartosz: moved the Kconfig entry into a different category] Signed-off-by: Bartosz Golaszewski

gpio: tqmx86: fix typo in Kconfig label

2024-06-03T12:13:13+00:00

Fix description for GPIO_TQMX86 from QTMX86 to TQMx86. Fixes: b868db94a6a7 ("gpio: tqmx86: Add GPIO from for this IO controller") Signed-off-by: Gregor Herburger Signed-off-by: Matthias Schiffer Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/e0e38c9944ad6d281d9a662a45d289b88edc808e.1717063994.git.matthias.schiffer@ew.tq-group.com Signed-off-by: Bartosz Golaszewski

gpio: brcmstb: Allow building driver for ARCH_BCM2835

2024-06-03T08:22:33+00:00

The GPIO_BRCMSTB hardware IP is also included in the bcm2712 SoC so enable the driver to also be built for ARCH_BCM2835. Signed-off-by: Peter Robinson Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20240530181737.1261450-1-pbrobinson@gmail.com Signed-off-by: Bartosz Golaszewski

Merge tag 'gpio-updates-for-v6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

2024-05-14T22:07:07+00:00

Pull gpio updates from Bartosz Golaszewski "This was a quiet release cycle for the GPIO tree and so this pull-request is relatively small. We have one new driver, some minor improvements to the GPIO core code and across several drivers, some DT and documentation updates but in general nothing stands out or is controversial. All changes have spent time in next with no reported issues (or ones that were quickly fixed). GPIO core: - remove more unused legacy interfaces (after converting the last remaining users to better alternatives) - update kerneldocs - improve error handling and log messages in GPIO ACPI code - remove dead code (always true checks) from GPIOLIB New drivers: - add a driver for Intel Granite Rapids-D vGPIO Driver improvements: - use -ENOTSUPP consistently in gpio-regmap and gpio-pcie-idio-24 - provide an ID table for gpio-cros-ec to avoid a driver name fallback check - add support for gpio-ranges for GPIO drivers supporting multiple GPIO banks - switch to using dynamic GPIO base in gpio-brcmstb - fix irq handling in gpio-npcm-sgpio - switch to memory mapped IO accessors in gpio-sch DT bindings: - add support for gpio-ranges to gpio-brcmstb - add support for a new model and the gpio-line-names property to gpio-mpfs Documentation: - replace leading tabs with spaces in code blocks - fix typos" * tag 'gpio-updates-for-v6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (30 commits) gpio: nuvoton: Fix sgpio irq handle error gpiolib: Discourage to use formatting strings in line names gpio: brcmstb: add support for gpio-ranges gpio: of: support gpio-ranges for multiple gpiochip devices dt-bindings: gpio: brcmstb: add gpio-ranges gpio: Add Intel Granite Rapids-D vGPIO driver gpio: brcmstb: Use dynamic GPIO base numbers gpiolib: acpi: Set label for IRQ only lines gpiolib: acpi: Add fwnode name to the GPIO interrupt label gpiolib: Get rid of never false gpio_is_valid() calls gpiolib: acpi: Pass con_id instead of property into acpi_dev_gpio_irq_get_by() gpiolib: acpi: Move acpi_can_fallback_to_crs() out of __acpi_find_gpio() gpiolib: acpi: Simplify error handling in __acpi_find_gpio() gpiolib: acpi: Extract __acpi_find_gpio() helper gpio: sch: Utilise temporary variable for struct device gpio: sch: Switch to memory mapped IO accessors gpio: regmap: Use -ENOTSUPP consistently gpio: pcie-idio-24: Use -ENOTSUPP consistently Documentation: gpio: Replace leading TABs by spaces in code blocks gpiolib: acpi: Check for errors first in acpi_find_gpio() ...

gpio: Add Intel Granite Rapids-D vGPIO driver

2024-04-25T11:57:28+00:00

This driver provides a basic GPIO driver for the Intel Granite Rapids-D virtual GPIOs. On SoCs with limited physical pins on the package, the physical pins controlled by this driver would be exposed on an external device such as a BMC or CPLD. The virtual GPIO registers are an interface to firmware, which communicates with the external device that implements the GPIO hardware functionality. Signed-off-by: Aapo Vienamo Reviewed-by: Mika Westerberg Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko

gpio: swnode: Add ability to specify native chip selects for SPI

2024-04-16T11:00:27+00:00

SPI devices can specify a cs-gpios property to enumerate their chip selects. Under device tree, a zero entry in this property can be used to specify that a particular chip select is using the SPI controllers native chip select, for example: cs-gpios = <&gpio1 0 0>, <0>; Here, the second chip select is native. However, when using swnodes there is currently no way to specify a native chip select. The proposal here is to register a swnode_gpio_undefined software node, that can be specified to allow the indication of a native chip select. For example: static const struct software_node_ref_args device_cs_refs[] = { { .node = &device_gpiochip_swnode, .nargs = 2, .args = { 0, GPIO_ACTIVE_LOW }, }, { .node = &swnode_gpio_undefined, .nargs = 0, }, }; Register the swnode as the gpiolib is initialised and check in swnode_get_gpio_device() if the returned node matches swnode_gpio_undefined and return -ENOENT, which matches the behaviour of the device tree system when it encounters a 0 phandle. Reviewed-by: Linus Walleij Reviewed-by: Andy Shevchenko Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20240416100904.3738093-2-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

Merge tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

2024-03-14T17:22:26+00:00

Pull pin control updates from Linus Walleij: "No core changes this time around. New drivers: - New driver for Renesas R8A779H0 also known as R-Car V4M. - New driver for the Awinic AW9523/B I2C GPIO expander. I found this living out-of-tree in OpenWrt as an upstream attempt had stalled on the finishing line, so I picked it up and finished the job. Improvements: - The Nomadik pin control driver was for years re-used out of tree for the ST STA chips, and now the IP was re-used in a MIPS automotive SoC called MobilEyeq5, so it has been split in pin control and GPIO drivers so the latter can be reused by MobilEyeq5. (Along with a long list of cleanups) - A lot of overall cleanup and tidying up" * tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (87 commits) drivers/gpio/nomadik: move dummy nmk_gpio_dbg_show_one() to header gpio: nomadik: remove BUG_ON() in nmk_gpio_populate_chip() dt-bindings: pinctrl: qcom: update compatible name for match with driver pinctrl: aw9523: Make the driver tristate pinctrl: nomadik: fix dereference of error pointer gpio: nomadik: Back out some managed resources pinctrl: aw9523: Add proper terminator pinctrl: core: comment that pinctrl_add_gpio_range() is deprecated pinctrl: pinmux: Suppress error message for -EPROBE_DEFER pinctrl: Add driver for Awinic AW9523/B I2C GPIO Expander dt-bindings: pinctrl: Add bindings for Awinic AW9523/AW9523B gpio: nomadik: Finish conversion to use firmware node APIs gpio: nomadik: fix Kconfig dependencies inbetween pinctrl & GPIO pinctrl: da9062: Add OF table dt-bindings: pinctrl: at91: add sam9x7 pinctrl: ocelot: remove redundant assignment to variable ret gpio: nomadik: grab optional reset control and deassert it at probe gpio: nomadik: support mobileye,eyeq5-gpio gpio: nomadik: handle variadic GPIO count gpio: nomadik: support shared GPIO IRQs ...