summaryrefslogtreecommitdiffstats
path: root/drivers/gpio (follow)
Commit message (Collapse)AuthorAgeFilesLines
* gpiolib: acpi: Add a ignore wakeup quirk for Clevo NL5xRUMario Limonciello2023-01-181-0/+13
| | | | | | | | | | | | | | | | | | | | | | | commit 1796f808e4bb ("HID: i2c-hid: acpi: Stop setting wakeup_capable") changed the policy such that I2C touchpads may be able to wake up the system by default if the system is configured as such. However on Clevo NL5xRU there is a mistake in the ACPI tables that the TP_ATTN# signal connected to GPIO 9 is configured as ActiveLow and level triggered but connected to a pull up. As soon as the system suspends the touchpad loses power and then the system wakes up. To avoid this problem, introduce a quirk for this model that will prevent the wakeup capability for being set for GPIO 9. Fixes: 1796f808e4bb ("HID: i2c-hid: acpi: Stop setting wakeup_capable") Reported-by: Werner Sembach <wse@tuxedocomputers.com> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627 Co-developed-by: Werner Sembach <wse@tuxedocomputers.com> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpiolib: acpi: Allow ignoring wake capability on pins that aren't in _AEIMario Limonciello2023-01-181-2/+2
| | | | | | | | | | | | | Using the `ignore_wake` quirk or module parameter doesn't work for any pin that has been specified in the _CRS instead of _AEI. Extend the `acpi_gpio_irq_is_wake` check to cover both places. Suggested-by: Raul Rangel <rrangel@chromium.org> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1722335 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: mxc: Always set GPIOs used as interrupt source to INPUT modeMarek Vasut2023-01-161-1/+1
| | | | | | | | | | | | | | Always configure GPIO pins which are used as interrupt source as INPUTs. In case the default pin configuration is OUTPUT, or the prior stage does configure the pins as OUTPUT, then Linux will not reconfigure the pin as INPUT and no interrupts are received. Always configure the interrupt source GPIO pin as input to fix the above case. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Fixes: 07bd1a6cc7cbb ("MXC arch: Add gpio support for the whole platform") Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: mxc: Protect GPIO irqchip RMW with bgpio spinlockMarek Vasut2023-01-161-0/+11
| | | | | | | | | | | | | The driver currently performs register read-modify-write without locking in its irqchip part, this could lead to a race condition when configuring interrupt mode setting. Add the missing bgpio spinlock lock/unlock around the register read-modify-write. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Marc Zyngier <maz@kernel.org> Fixes: 07bd1a6cc7cbb ("MXC arch: Add gpio support for the whole platform") Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: sifive: Fix refcount leak in sifive_gpio_probeMiaoqian Lin2023-01-021-0/+1
| | | | | | | | | | of_irq_find_parent() returns a node pointer with refcount incremented, We should use of_node_put() on it when not needed anymore. Add missing of_node_put() to avoid refcount leak. Fixes: 96868dce644d ("gpio/sifive: Add GPIO driver for SiFive SoCs") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: sprd: Make the irqchip immutableCixi Geng2022-12-301-3/+6
| | | | | | | | | | | Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the new helper functions, and call the appropriate gpiolib functions. Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Reported-by: kernel test robot <lkp@intel.com> Reported-by: Julia Lawall <julia.lawall@lip6.fr> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: pmic-eic-sprd: Make the irqchip immutableCixi Geng2022-12-301-11/+18
| | | | | | | | | | Remove the irq_chip from pmic_eic structure, use the various calls by defining the statically irq_chip structure. Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: eic-sprd: Make the irqchip immutableCixi Geng2022-12-301-9/+14
| | | | | | | | | | Remove the irq_chip from pmic_eic structure, use the various calls by defining the statically irq_chip structure. Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpio: pca953x: avoid to use uninitialized value pinctrlHaibo Chen2022-12-301-0/+3
| | | | | | | | | | | | | There is a variable pinctrl declared without initializer. And then has the case (switch operation chose the default case) to directly use this uninitialized value, this is not a safe behavior. So here initialize the pinctrl as 0 to avoid this issue. This is reported by Coverity. Fixes: 13c5d4ce8060 ("gpio: pca953x: Add support for PCAL6534") Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* gpiolib: Fix using uninitialized lookup-flags on ACPI platformsHans de Goede2022-12-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 8eb1f71e7acc ("gpiolib: consolidate GPIO lookups") refactors fwnode_get_named_gpiod() and gpiod_get_index() into a unified gpiod_find_and_request() helper. The old functions both initialized their local lookupflags variable to GPIO_LOOKUP_FLAGS_DEFAULT, but the new code leaves it uninitialized. This is a problem for at least ACPI platforms, where acpi_find_gpio() only does a bunch of *lookupflags |= GPIO_* statements and thus relies on the variable being initialized. The variable not being initialized leads to: 1. Potentially the wrong flags getting used 2. The check for conflicting lookup flags in gpiod_configure_flags(): "multiple pull-up, pull-down or pull-disable enabled, invalid config" sometimes triggering, making the GPIO unavailable Restore the initialization of lookupflags to GPIO_LOOKUP_FLAGS_DEFAULT to fix this. Fixes: 8eb1f71e7acc ("gpiolib: consolidate GPIO lookups") Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
* Merge tag 'pwm/for-6.2-rc1' of ↵Linus Torvalds2022-12-211-3/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "Various changes across the board, mostly improvements and cleanups" * tag 'pwm/for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (42 commits) pwm: pca9685: Convert to i2c's .probe_new() pwm: sun4i: Propagate errors in .get_state() to the caller pwm: Handle .get_state() failures pwm: sprd: Propagate errors in .get_state() to the caller pwm: rockchip: Propagate errors in .get_state() to the caller pwm: mtk-disp: Propagate errors in .get_state() to the caller pwm: imx27: Propagate errors in .get_state() to the caller pwm: cros-ec: Propagate errors in .get_state() to the caller pwm: crc: Propagate errors in .get_state() to the caller leds: qcom-lpg: Propagate errors in .get_state() to the caller drm/bridge: ti-sn65dsi86: Propagate errors in .get_state() to the caller pwm/tracing: Also record trace events for failed API calls pwm: Make .get_state() callback return an error code pwm: pxa: Enable for MMP platform pwm: pxa: Add reference manual link and limitations pwm: pxa: Use abrupt shutdown mode pwm: pxa: Remove clk enable/disable from pxa_pwm_config pwm: pxa: Set duty cycle to 0 when disabling PWM pwm: pxa: Remove pxa_pwm_enable/disable pwm: mediatek: Add support for MT7986 ...
| * pwm: Make .get_state() callback return an error codeUwe Kleine-König2022-12-061-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | .get_state() might fail in some cases. To make it possible that a driver signals such a failure change the prototype of .get_state() to return an error code. This patch was created using coccinelle and the following semantic patch: @p1@ identifier getstatefunc; identifier driver; @@ struct pwm_ops driver = { ..., .get_state = getstatefunc ,... }; @p2@ identifier p1.getstatefunc; identifier chip, pwm, state; @@ -void +int getstatefunc(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_state *state) { ... - return; + return 0; ... } plus the actual change of the prototype in include/linux/pwm.h (plus some manual fixing of indentions and empty lines). So for now all drivers return success unconditionally. They are adapted in the following patches to make the changes easier reviewable. Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Acked-by: Douglas Anderson <dianders@chromium.org> Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221130152148.2769768-2-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* | Merge tag 'gpio-updates-for-v6.2' of ↵Linus Torvalds2022-12-1534-1106/+1417
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux Pull gpio updates from Bartosz Golaszewski: "We have a new GPIO multiplexer driver, bunch of driver updates and refactoring in the core GPIO library. GPIO core: - teach gpiolib to work with software nodes for HW description - remove ARCH_NR_GPIOS treewide as we no longer impose any limit on the number of GPIOS since the allocation became entirely dynamic - add support for HW quirks for Cirrus CS42L56 codec, Marvell NFC controller, Freescale PCIe and Ethernet controller, Himax LCDs and Mediatek mt2701 - refactor OF quirk code - some general refactoring of the OF and ACPI code, adding new helpers, minor tweaks and fixes, making fwnode usage consistent etc. GPIO uAPI: - fix an issue where the user-space can trigger a NULL-pointer dereference in the kernel by opening a device file, forcing a driver unbind and then calling one of the syscalls on the associated file descriptor New drivers: - add gpio-latch: a new GPIO multiplexer based on latches connected to other GPIOs Driver updates: - convert i2c GPIO expanders to using .probe_new() - drop the gpio-sta2x11 driver - factor out common code for the ACCES IDIO-16 family of controllers and use this new library wherever applicable in drivers - add DT support to gpio-hisi - allow building gpio-davinci as a module and increase its maxItems property - add support for a new model to gpio-pca9570 - other minor changes to various drivers" * tag 'gpio-updates-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (66 commits) gpio: sim: set a limit on the number of GPIOs gpiolib: protect the GPIO device against being dropped while in use by user-space gpiolib: cdev: fix NULL-pointer dereferences gpiolib: Provide to_gpio_device() helper gpiolib: Unify access to the device properties gpio: Do not include <linux/kernel.h> when not really needed. gpio: pcf857x: Convert to i2c's .probe_new() gpio: pca953x: Convert to i2c's .probe_new() gpio: max732x: Convert to i2c's .probe_new() dt-bindings: gpio: gpio-davinci: Increase maxItems in gpio-line-names gpiolib: ensure that fwnode is properly set gpio: sl28cpld: Replace irqchip mask_invert with unmask_base gpiolib: of: Use correct fwnode for DT-probed chips gpiolib: of: Drop redundant check in of_mm_gpiochip_remove() gpiolib: of: Prepare of_mm_gpiochip_add_data() for fwnode gpiolib: add support for software nodes gpiolib: consolidate GPIO lookups gpiolib: acpi: avoid leaking ACPI details into upper gpiolib layers gpiolib: acpi: teach acpi_find_gpio() to handle data-only nodes gpiolib: acpi: change acpi_find_gpio() to accept firmware node ...
| * | gpio: sim: set a limit on the number of GPIOsBartosz Golaszewski2022-12-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the removal of ARCH_NR_GPIOS in commit 7b61212f2a07 ("gpiolib: Get rid of ARCH_NR_GPIOS") the gpiolib core no longer sanitizes the number of GPIOs for us. This causes the gpio-sim selftests to now fail when setting the number of GPIOs to 99999 and expecting the probe() to fail. Set a sane limit of 1024 on the number of simulated GPIOs and bail out of probe if it's exceeded. Reported-by: kernel test robot <oliver.sang@intel.com> Link: https://lore.kernel.org/oe-lkp/202212112236.756f5db9-oliver.sang@intel.com Fixes: 7b61212f2a07 ("gpiolib: Get rid of ARCH_NR_GPIOS") Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: protect the GPIO device against being dropped while in use by ↵Bartosz Golaszewski2022-12-073-25/+161
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | user-space While any of the GPIO cdev syscalls is in progress, the kernel can call gpiochip_remove() (for instance, when a USB GPIO expander is disconnected) which will set gdev->chip to NULL after which any subsequent access will cause a crash. To avoid that: use an RW-semaphore in which the syscalls take it for reading (so that we don't needlessly prohibit the user-space from calling syscalls simultaneously) while gpiochip_remove() takes it for writing so that it can only happen once all syscalls return. Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines") Fixes: 3c0d9c635ae2 ("gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL") Fixes: aad955842d1c ("gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL") Fixes: a54756cb24ea ("gpiolib: cdev: support GPIO_V2_LINE_SET_CONFIG_IOCTL") Fixes: 7b8e00d98168 ("gpiolib: cdev: support GPIO_V2_LINE_SET_VALUES_IOCTL") Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> [Nick: fixed a build failure with CDEV_V1 disabled] Co-authored-by: Nick Hainke <vincent@systemli.org> Reviewed-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * | gpiolib: cdev: fix NULL-pointer dereferencesBartosz Golaszewski2022-12-071-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are several places where we can crash the kernel by requesting lines, unbinding the GPIO device, then calling any of the system calls relevant to the GPIO character device's annonymous file descriptors: ioctl(), read(), poll(). While I observed it with the GPIO simulator, it will also happen for any of the GPIO devices that can be hot-unplugged - for instance any HID GPIO expander (e.g. CP2112). This affects both v1 and v2 uAPI. This fixes it partially by checking if gdev->chip is not NULL but it doesn't entirely remedy the situation as we still have a race condition in which another thread can remove the device after the check. Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines") Fixes: 3c0d9c635ae2 ("gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL") Fixes: aad955842d1c ("gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL") Fixes: a54756cb24ea ("gpiolib: cdev: support GPIO_V2_LINE_SET_CONFIG_IOCTL") Fixes: 7b8e00d98168 ("gpiolib: cdev: support GPIO_V2_LINE_SET_VALUES_IOCTL") Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * | gpiolib: Provide to_gpio_device() helperAndy Shevchenko2022-11-292-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide to_gpio_device() helper which can be utilized in the existing and future code. While at it, make sure it becomes no-op at compilation time. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: Unify access to the device propertiesAndy Shevchenko2022-11-281-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the functions are using struct fwnode_handle, some struct device pointer. In the GPIO library the firmware node of the GPIO device is the same as GPIO node of the GPIO chip. Due to this fact we may use former to access properties everywhere in the code. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Brian Masney <bmasney@redhat.com> Tested-by: Marijn Suijten <marijn.suijten@somainline.org> [Bartosz: stick to the 80-char limit where it's not hurting readability] Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: pcf857x: Convert to i2c's .probe_new()Uwe Kleine-König2022-11-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | .probe_new() doesn't get the i2c_device_id * parameter, so determine that explicitly in the probe function. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: pca953x: Convert to i2c's .probe_new()Uwe Kleine-König2022-11-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | .probe_new() doesn't get the i2c_device_id * parameter, so determine that explicitly in the probe function. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: max732x: Convert to i2c's .probe_new()Uwe Kleine-König2022-11-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | .probe_new() doesn't get the i2c_device_id * parameter, so determine that explicitly in the probe function. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | Merge tag 'intel-gpio-v6.2-1' of ↵Bartosz Golaszewski2022-11-163-3/+4
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel into gpio/for-next intel-gpio for v6.2-1 * Miscellaneous updates to the core (cdev, acpi) and Intel Merrifield driver The following is an automated git shortlog grouped by driver: gpiolib: - cdev: Fix typo in kernel doc for struct line - acpi: Use METHOD_NAME__AEI macro for acpi_walk_resources merrifield: - Use str_enable_disable() helper
| | * | gpiolib: cdev: Fix typo in kernel doc for struct lineAndy Shevchenko2022-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When eflags has been renamed to the edflags, the kernel doc change were missed. Update kernel doc accordingly. Fixes: b1a92e94560d ("gpiolib: cdev: consolidate edge detector configuration flags") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Kent Gibson <warthog618@gmail.com>
| | * | gpiolib: acpi: Use METHOD_NAME__AEI macro for acpi_walk_resourcesXiang Yang2022-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Using the METHOD_NAME__AEI macro instead of using "_AEI" directly. Signed-off-by: Xiang Yang <xiangyang3@huawei.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
| | * | gpio: merrifield: Use str_enable_disable() helperAndy Shevchenko2022-10-181-1/+2
| | |/ | | | | | | | | | | | | | | | Use str_enable_disable() helper instead of open coding the same. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
| * | gpiolib: ensure that fwnode is properly setBrian Masney2022-11-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Note that this is a RFC patch and not meant to be merged. I looked into a problem with linux-next-20221110 on the Qualcomm SA8540P automotive board (sc8280xp) where the UFS host controller would fail to probe due to repeated probe deferrals when trying to get reset-gpios via devm_gpiod_get_optional(). of_get_named_gpiod_flags() returns -EPROBE_DEFER, which is caused by of_gpiochip_match_node_and_xlate() returning 0 since the of_xlate function pointer is not set for the qcom,sc8280xp-tlmm pinctrl driver. The pinctrl driver doesn't define one, so of_gpiochip_add() should automatically setup of_gpio_simple_xlate() on it's behalf. This doesn't happen since the fwnode member on the struct gpiochip is set to null when of_gpiochip_add() is called. Let's work around this by ensuring that it's set if available. Note that this broke sometime within the last few weeks within linux-next and I haven't bisected this. I'm posting this in the hopes that someone may know offhand which patch(es) may have broken this. Signed-off-by: Brian Masney <bmasney@redhat.com> Tested-by: Marijn Suijten <marijn.suijten@somainline.org> Tested-by: Konrad Dybcio <konrad.dybcio@linaro.org> Tested-by: Steev Klimaszewski <steev@kali.org> #Lenovo Thinkpad X13s Tested-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: sl28cpld: Replace irqchip mask_invert with unmask_baseAidan MacDonald2022-11-151-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove use of the deprecated mask_invert flag. Inverted mask registers (where a '1' bit enables an IRQ) can be described more directly as an unmask register. Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Use correct fwnode for DT-probed chipsThierry Reding2022-11-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The OF node store in chip->fwnode is used to explicitly override the FW node for a GPIO chip. For chips that use the default FW node (i.e. that of their parent device), this will be NULL and cause the chip not to be fully registered. Instead, use the GPIO device's FW node, which is set to either the node of the parent device or the explicit override in chip->fwnode. Fixes: 8afe82550240 ("gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode") Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Robert Marko <robimarko@gmail.com> Tested-by: Andrew Halaney <ahalaney@redhat.com> Reviewed-by: Brian Masney <bmasney@redhat.com> Tested-by: Brian Masney <bmasney@redhat.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Drop redundant check in of_mm_gpiochip_remove()Andy Shevchenko2022-11-151-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The callers never call the function with invalid pointer. Moreover, compiler quite likely dropped that check anyway because we use that pointer before the check. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Prepare of_mm_gpiochip_add_data() for fwnodeAndy Shevchenko2022-11-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GPIO library is getting rid of of_node, fwnode should be utilized instead. Prepare of_mm_gpiochip_add_data() for fwnode. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: add support for software nodesDmitry Torokhov2022-11-154-0/+145
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that static device properties understand notion of child nodes and references, let's teach gpiolib to handle them: - GPIOs are represented as a references to software nodes representing gpiochip - references must have 2 arguments - GPIO number within the chip and GPIO flags (GPIO_ACTIVE_LOW/GPIO_ACTIVE_HIGH, etc) - a new PROPERTY_ENTRY_GPIO() macro is supplied to ensure the above - name of the software node representing gpiochip must match label of the gpiochip, as we use it to locate gpiochip structure at runtime The following illustrates use of software nodes to describe a "System" button that is currently specified via use of gpio_keys_platform_data in arch/mips/alchemy/board-mtx1.c. It follows bindings specified in Documentation/devicetree/bindings/input/gpio-keys.yaml. static const struct software_node mxt1_gpiochip2_node = { .name = "alchemy-gpio2", }; static const struct property_entry mtx1_gpio_button_props[] = { PROPERTY_ENTRY_U32("linux,code", BTN_0), PROPERTY_ENTRY_STRING("label", "System button"), PROPERTY_ENTRY_GPIO("gpios", &mxt1_gpiochip2_node, 7, GPIO_ACTIVE_LOW), { } }; Similarly, arch/arm/mach-tegra/board-paz00.c can be converted to: static const struct software_node tegra_gpiochip_node = { .name = "tegra-gpio", }; static struct property_entry wifi_rfkill_prop[] __initdata = { PROPERTY_ENTRY_STRING("name", "wifi_rfkill"), PROPERTY_ENTRY_STRING("type", "wlan"), PROPERTY_ENTRY_GPIO("reset-gpios", &tegra_gpiochip_node, 25, GPIO_ACTIVE_HIGH); PROPERTY_ENTRY_GPIO("shutdown-gpios", &tegra_gpiochip_node, 85, GPIO_ACTIVE_HIGH); { }, }; static struct platform_device wifi_rfkill_device = { .name = "rfkill_gpio", .id = -1, }; ... software_node_register(&tegra_gpiochip_node); device_create_managed_software_node(&wifi_rfkill_device.dev, wifi_rfkill_prop, NULL); Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: consolidate GPIO lookupsDmitry Torokhov2022-11-153-177/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that all paths to obtain/look up GPIOD from generic consumer-visible APIs go through the new gpiod_find_and_request() helper, so that we can easily extend it with support for new firmware mechanisms. The only exception is OF-specific [devm_]gpiod_get_from_of_node() API that is still being used by a couple of drivers and will be removed as soon as patches converting them to use generic fwnode/device APIs are accepted. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: acpi: avoid leaking ACPI details into upper gpiolib layersDmitry Torokhov2022-11-153-57/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no need for the generic parts of GPIOLIB to be aware of implementation details of ACPI-bases lookups. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: acpi: teach acpi_find_gpio() to handle data-only nodesDmitry Torokhov2022-11-151-26/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation of switching all ACPI-based GPIO lookups to go through acpi_find_gpio() we need to make sure it can handle data-only ACPI nodes, same as existing acpi_node_get_gpiod(). Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: acpi: change acpi_find_gpio() to accept firmware nodeDmitry Torokhov2022-11-153-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation of switching all ACPI-based GPIO lookups to go through acpi_find_gpio() let's change it to accept device node as its argument as we do not always have access to device structure. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: change of_find_gpio() to accept device nodeDmitry Torokhov2022-11-153-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation of switching all OF-based GPIO lookups to go through of_find_gpio() let's change it to accept device node as its argument as we do not always have access to device structure. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: davinci: add support of module buildGuillaume La Roque2022-11-102-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | Added module build support for the davinci gpio driver Signed-off-by: Guillaume La Roque <glaroque@baylibre.com> Signed-off-by: Nicolas Frayer <nfrayer@baylibre.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Integrate of_gpiochip_init_valid_mask() into ↵Andy Shevchenko2022-11-093-48/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gpiochip_init_valid_mask() In preparation to complete fwnode switch, integrate of_gpiochip_init_valid_mask() into gpiochip_init_valid_mask(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnodeAndy Shevchenko2022-11-091-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GPIO library is getting rid of of_node, fwnode should be utilized instead. Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: hisi: Add initial device tree supportWeilong Chen2022-11-072-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for HiSilicon GPIO controller in embedded platform, which boot from devicetree. Signed-off-by: Weilong Chen <chenweilong@huawei.com> Acked-by: Jay Fang <f.fangjian@huawei.com> Reviewed-by: Yicong Yang <yangyicong@hisilicon.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: Add Generic regmap GPIO conversion to the TODO listAndy Shevchenko2022-11-071-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | It's actually preferable to use Generic regmap GPIO over other simple approaches. Add a TODO item for that. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: add polarity quirk for Freescale PCIe controllerDmitry Torokhov2022-11-041-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bindings for Freescale PCIe controller use a separate property called "reset-gpio-active-high" to control polarity of its reset line, add it to the list of quirks in gpiolib so that gpiod API can be used in the driver. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: factor out quirk setting polarity via separate propertyDmitry Torokhov2022-11-041-45/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | Several legacy bindings use a separate property to specify polarity of GPIOs instead of specifying it directly in the GPIO property. Factor out this code to make it easier to add more such cases. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpiolib: of: Make use of device_match_of_node()Andy Shevchenko2022-11-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Make use of device_match_of_node() instead of open coding its functionality. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: pca9570: add slg7xl45106 supportShubhrajyoti Datta2022-10-271-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dialog semiconductors SLG7XL45106 is an 8-bit I2C GPO expander. The output port is controlled by a data byte with register address. Add a compatible string for the same. Also update the driver to write and read from it. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: pca9570: add a platform data structureShubhrajyoti Datta2022-10-271-5/+26
| | | | | | | | | | | | | | | | | | | | | | | | Add struct pca9570_platform_data for adding the platform data structure. Also modify the existing structs for pca9570 and pca9571 Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: exar: Allow IO port accessAndy Shevchenko2022-10-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's possible that PCI device can provide an IO port resource for the device. regmap MMIO currently uses MMIO by default. With an additional flag we enable support for IO port accesses. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: William Breathitt Gray <william.gray@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: Add gpio latch driverSascha Hauer2022-10-263-0/+226
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver implements a GPIO multiplexer based on latches connected to other GPIOs. A set of data GPIOs is connected to the data input of multiple latches. The clock input of each latch is driven by another set of GPIOs. With two 8-bit latches 10 GPIOs can be multiplexed into 16 GPIOs. GPOs might be a better term as in fact the multiplexed pins are output only. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> [Bartosz: fixed the strange of_device_id formatting] Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: pci-idio-16: Utilize the idio-16 GPIO libraryWilliam Breathitt Gray2022-10-252-106/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | The ACCES PCI-IDIO-16 device is part of the ACCES IDIO-16 family, so the idio-16 GPIO library module is selected and utilized to consolidate code. Signed-off-by: William Breathitt Gray <william.gray@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| * | gpio: 104-idio-16: Utilize the idio-16 GPIO libraryWilliam Breathitt Gray2022-10-252-72/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | The ACCES 104-IDIO-16 device is part of the ACCES IDIO-16 family, so the idio-16 GPIO library module is selected and utilized to consolidate code. Signed-off-by: William Breathitt Gray <william.gray@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 21:25:09 +0100