cd26465fbc
The Crystal Cove PMIC has a pin which can be used to connect the IRQ of an external charger IC. On some boards this is used so we need a way to look this up. Note that the Intel PMICs have 2 levels of interrupts and thus 2 levels of IRQ domains all tied to a single fwnode. Level 1 is the irqchip which demultiplexes the actual PMIC interrupt into interrupts for the various MFD cells. Level 2 are the irqchips used in the cell drivers which themselves export IRQs, such as the crystal_cove_gpio driver, which de-multiplexes the level 2 interrupts for the GPIOs into individual per GPIO IRQs. The crystal_cove_charger driver registers an irqchip with a single IRQ for the charger driver to consume. Note the MFD cell IRQ cannot be consumed directly because the level 2 interrupts must be explicitly acked. To allow finding the right IRQ domain when looking up the IRQ for the charger, the crystal_cove_charger driver sets a DOMAIN_BUS_WIRED token on its IRQ domain. Add support for looking up the IRQ from the crystal_cove_charger driver. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20211229231431.437982-6-hdegoede@redhat.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.