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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 |
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