kernel/linux.git/include/linux/irqdomain.h, branch v5.15.209

genirq: Allow the PM device to originate from irq domain

2024-08-19T03:45:30+00:00

[ Upstream commit 1f8863bfb5ca500ea1c7669b16b1931ba27fce20 ] As a preparation to moving the reference to the device used for runtime power management, add a new 'dev' field to the irqdomain structure for that exact purpose. The irq_chip_pm_{get,put}() helpers are made aware of the dual location via a new private helper. No functional change intended. Signed-off-by: Marc Zyngier Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven Tested-by: Tony Lindgren Acked-by: Bartosz Golaszewski Link: https://lore.kernel.org/r/20220201120310.878267-2-maz@kernel.org Stable-dep-of: 33b1c47d1fc0 ("irqchip/imx-irqsteer: Handle runtime power management correctly") Signed-off-by: Sasha Levin

irqdomain: Change the type of 'size' in __irq_domain_add() to be consistent

2021-09-22T13:29:32+00:00

The 'size' is used in struct_size(domain, revmap, size) and its input parameter type is 'size_t'(unsigned int). Changing the size to 'unsigned int' to make the type consistent. Signed-off-by: Bixuan Cui Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210916025203.44841-1-cuibixuan@huawei.com

irqdomain: Introduce irq_resolve_mapping()

2021-06-10T12:09:18+00:00

Rework irq_find_mapping() to return an both an irq_desc pointer, optionally the virtual irq number, and rename the result to __irq_resolve_mapping(). a new helper called irq_resolve_mapping() is provided for code that doesn't need the virtual irq number. irq_find_mapping() is also rewritten in terms of __irq_resolve_mapping(). Signed-off-by: Marc Zyngier

irqdomain: Protect the linear revmap with RCU

2021-06-10T12:09:18+00:00

It is pretty odd that the radix tree uses RCU while the linear portion doesn't, leading to potential surprises for the users, depending on how the irqdomain has been created. Fix this by moving the update of the linear revmap under the mutex, and the lookup under the RCU read-side lock. The mutex name is updated to reflect that it doesn't only cover the radix-tree anymore. Signed-off-by: Marc Zyngier

irqdomain: Cache irq_data instead of a virq number in the revmap

2021-06-10T12:09:18+00:00

Caching a virq number in the revmap is pretty inefficient, as it means we will need to convert it back to either an irq_data or irq_desc to do anything with it. It is also a bit odd, as the radix tree does cache irq_data pointers. Change the revmap type to be an irq_data pointer instead of an unsigned int, and preserve the current API for now. Signed-off-by: Marc Zyngier

irqdomain: Make normal and nomap irqdomains exclusive

2021-06-10T12:09:17+00:00

Direct mappings are completely exclusive of normal mappings, meaning that we can refactor the code slightly so that we can get rid of the revmap_direct_max_irq field and use the revmap_size field instead, reducing the size of the irqdomain structure. Signed-off-by: Marc Zyngier

powerpc: Move the use of irq_domain_add_nomap() behind a config option

2021-06-10T12:09:17+00:00

Only a handful of old PPC systems are still using the old 'nomap' variant of the irqdomain library. Move the associated definitions behind a configuration option, which will allow us to make some more radical changes. Signed-off-by: Marc Zyngier

irqdomain: Reimplement irq_linear_revmap() with irq_find_mapping()

2021-06-10T12:09:17+00:00

irq_linear_revmap() is supposed to be a fast path for domain lookups, but it only exposes low-level details of the irqdomain implementation, details which are better kept private. The *overhead* between the two is only a function call and a couple of tests, so it is likely that noone can show any meaningful difference compared to the cost of taking an interrupt. Reimplement irq_linear_revmap() with irq_find_mapping() in order to preserve source code compatibility, and rename the internal field for a measure. Signed-off-by: Marc Zyngier

irqdomain: Kill irq_domain_add_legacy_isa

2021-06-10T12:09:17+00:00

This helper doesn't have a user anymore, let's remove it. Signed-off-by: Marc Zyngier

Merge tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

2021-05-05T19:39:29+00:00

Pull gpio updates from Bartosz Golaszewski: - new driver for the Realtek Otto GPIO controller - ACPI support for gpio-mpc8xxx - edge event support for gpio-sch (+ Kconfig fixes) - Kconfig improvements in gpio-ich - fixes to older issues in gpio-mockup - ACPI quirk for ignoring EC wakeups on Dell Venue 10 Pro 5055 - improve the GPIO aggregator code by using more generic interfaces instead of reimplementing them in the driver - convert the DT bindings for gpio-74x164 to yaml - documentation improvements - a slew of other minor fixes and improvements to GPIO drivers * tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (34 commits) dt-bindings: gpio: add YAML description for rockchip,gpio-bank gpio: mxs: remove useless function dt-bindings: gpio: fairchild,74hc595: Convert to json-schema gpio: it87: remove unused code gpio: 104-dio-48e: Fix coding style issues gpio: mpc8xxx: Add ACPI support gpio: ich: Switch to be dependent on LPC_ICH gpio: sch: Drop MFD_CORE selection gpio: sch: depends on LPC_SCH gpiolib: acpi: Add quirk to ignore EC wakeups on Dell Venue 10 Pro 5055 gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events gpio: sch: Add edge event support gpio: aggregator: Replace custom get_arg() with a generic next_arg() lib/cmdline: Export next_arg() for being used in modules gpio: omap: Use device_get_match_data() helper gpio: Add Realtek Otto GPIO support dt-bindings: gpio: Binding for Realtek Otto GPIO docs: kernel-parameters: Add gpio_mockup_named_lines docs: kernel-parameters: Move gpio-mockup for alphabetic order lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc() ...