talos-op-linux/drivers/gpio/gpiolib.h, branch master

Merge tag 'gpio-updates-for-v5.6-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

2020-01-07T12:53:39+00:00

gpio updates for v5.6 - improvements in the gpio-pca953x driver - use platform_irq_count() in gpio-mvebu and gpio-bcm-kona - remove unneeded MODULE_VERSION() usage in the gpio directory - irq-related improvements in gpio-tegra driver - several improvements for the core subsystem code: fix confusing indentation, fix int type casting, unduplicate code in several places

gpiolib: convert the type of hwnum to unsigned int in gpiochip_get_desc()

2020-01-07T11:03:28+00:00

gpiochip_get_desc() takes a u16 hwnum, but it turns out most users don't respect that and usually pass an unsigned int. Since implicit casting to a smaller type is dangerous - let's change the type of hwnum to unsigned int in gpiochip_get_desc() and in gpiochip_request_own_desc() where the size of hwnum is not respected either and who's a user of the former. This is safe as we then check the hwnum against the number of lines before proceeding in gpiochip_get_desc(). Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij

gpiolib: Add GPIOCHIP_NAME definition

2019-12-12T10:36:13+00:00

The string literal "gpiochip" is used in several places. Add a definition for it, and use it everywhere, to make sure everything stays in sync. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20191127084253.16356-2-geert+renesas@glider.be Reviewed-by: Ulrich Hecht Reviewed-by: Eugeniu Rosca Signed-off-by: Linus Walleij

gpiolib: add support for disabling line bias

2019-11-12T15:30:30+00:00

Allow pull up/down bias to be disabled, allowing the line to float or to be biased only by external circuitry. Use case is for where the bias has been applied previously, either by default or by the user, but that setting may conflict with the current use of the line. Signed-off-by: Kent Gibson Signed-off-by: Bartosz Golaszewski

gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h

2019-07-30T22:57:21+00:00

This is a follow up to the commit f626d6dfb709 ("gpio: of: Break out OF-only code") which broke down OF parts of GPIO library. Here we do the similar to ACPI. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20190730104337.21235-2-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij

gpio: of: Break out OF-only code

2019-07-28T21:07:59+00:00

The core gpiolib should not contain any OF/device tree-only code. Try to break out the main part of it and push it down into the optional gpiolib-of.c part of the library. Create a local gpiolib-of.h header and move stuff around a bit to get a clean cut. Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij Link: https://lore.kernel.org/r/20190717071001.3858-1-linus.walleij@linaro.org

gpiolib: Use spinlock_t instead of struct spinlock

2019-07-06T18:14:22+00:00

For spinlocks the type spinlock_t should be used instead of "struct spinlock". Use spinlock_t for spinlock's definition. Cc: linux-gpio@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior Link: https://lore.kernel.org/r/20190704153803.12739-8-bigeasy@linutronix.de Reviewed-by: Bartosz Golaszewski Signed-off-by: Linus Walleij

Merge tag 'gpio-v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2019-05-11T14:54:43+00:00

Pull gpio updates from Linus Walleij: "This is the bulk of the GPIO changes for the v5.2 kernel cycle. A bit later than usual because I was ironing out my own mistakes. I'm holding some stuff back for the next kernel as a result, and this should be a healthy and well tested batch. Core changes: - The gpiolib MMIO driver has been enhanced to handle two direction registers, i.e. one register to set lines as input and one register to set lines as output. It turns out some silicon engineer thinks the ability to configure a line as input and output at the same time makes sense, this can be debated but includes a lot of analog electronics reasoning, and the registers are there and need to be handled consistently. Unsurprisingly, we enforce the lines to be either inputs or outputs in such schemes. - Send in the proper argument value to .set_config() dispatched to the pin control subsystem. Nobody used it before, now someone does, so fix it to work as expected. - The ACPI gpiolib portions can now handle pin bias setting (pull up or pull down). This has been in the ACPI spec for years and we finally have it properly integrated with Linux GPIOs. It was based on an observation from Andy Schevchenko that Thomas Petazzoni's changes to the core for biasing the PCA950x GPIO expander actually happen to fit hand-in-glove with what the ACPI core needed. Such nice synergies happen sometimes. New drivers: - A new driver for the Mellanox BlueField GPIO controller. This is using 64bit MMIO registers and can configure lines as inputs and outputs at the same time and after improving the MMIO library we handle it just fine. Interesting. - A new IXP4xx proper gpiochip driver with hierarchical interrupts should be coming in from the ARM SoC tree as well. Driver enhancements: - The PCA053x driver handles the CAT9554 GPIO expander. - The PCA053x driver handles the NXP PCAL6416 GPIO expander. - Wake-up support on PCA053x GPIO lines. - OMAP now does a nice asynchronous IRQ handling on wake-ups by letting everything wake up on edges, and this makes runtime PM work as expected too. Misc: - Several cleanups such as devres fixes. - Get rid of some languager comstructs that cause problems when compiling with LLVMs clang. - Documentation review and update" * tag 'gpio-v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (85 commits) gpio: Update documentation docs: gpio: convert docs to ReST and rename to *.rst gpio: sch: Remove write-only core_base gpio: pxa: Make two symbols static gpiolib: acpi: Respect pin bias setting gpiolib: acpi: Add acpi_gpio_update_gpiod_lookup_flags() helper gpiolib: acpi: Set pin value, based on bias, more accurately gpiolib: acpi: Change type of dflags gpiolib: Introduce GPIO_LOOKUP_FLAGS_DEFAULT gpiolib: Make use of enum gpio_lookup_flags consistent gpiolib: Indent entry values of enum gpio_lookup_flags gpio: pca953x: add support for pca6416 dt-bindings: gpio: pca953x: document the nxp,pca6416 gpio: pca953x: add pcal6416 to the of_device_id table gpio: gpio-omap: Remove conditional pm_runtime handling for GPIO interrupts gpio: gpio-omap: configure edge detection for level IRQs for idle wakeup tracing: stop making gpio tracing configurable gpio: pca953x: Configure wake-up path when wake-up is enabled gpio: of: Optimize quirk checks gpio: mmio: Drop bgpio_dir_inverted ...

gpiolib: acpi: Respect pin bias setting

2019-04-23T08:55:28+00:00

For now, we don't take into account the pin bias settings supplied by ACPI. This change is targeting the mentioned gap. Signed-off-by: Andy Shevchenko Acked-by: Hans de Goede Reviewed-by: Mika Westerberg Signed-off-by: Linus Walleij

gpiolib: acpi: Add acpi_gpio_update_gpiod_lookup_flags() helper

2019-04-23T08:55:24+00:00

This helper consolidates all settings of GPIO descriptor lookup flags and quirks in the future if any. No functional change intended. Signed-off-by: Andy Shevchenko Acked-by: Hans de Goede Reviewed-by: Mika Westerberg Signed-off-by: Linus Walleij