Knuxify: add info about irq chip

2025-02-19T09:00:39Z

add info about irq chip

← Older revision		Revision as of 11:00, 19 February 2025
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	The BCM59054 has '''128 IRQs'''; the BCM59056 has '''64 IRQs'''. On both chips, interrupt handling is the same.		The BCM59054 has '''128 IRQs'''; the BCM59056 has '''64 IRQs'''. On both chips, interrupt handling is the same.

			There are a total of 16 8-bit IRQ registers (16 <code>INTx</code> registers followed by 16 <code>INTxMSK</code> registers, allowing for a theoretical total of 128 IRQs.

	=== Interrupt masking ===		=== Interrupt masking ===

	Interrupts can be masked/unmasked by writing the relevant bit to <code>INTxMSK</code> registers. A value of <code>0</code> indicates that the interrupt is masked; a value of <code>1</code> indicates that the interrupt is unmasked.		Interrupts can be masked/unmasked by writing the relevant bit to <code>INTxMSK</code> registers. A value of <code>1</code> indicates that the interrupt is masked; a value of <code>0</code> indicates that the interrupt is unmasked.

	=== Checking the status of an interrupt ===		=== Checking the status of an interrupt ===

	Interrupts report their status in <code>INTx</code> registers.		Interrupts report their status in <code>INTx</code> registers; a bit of <code>0</code> indicates that the interrupt is not on, and a bit of <code>1</code> indicates that the interrupt is on.

			When an interrupt is fired, the IRQ connected to the PMU is raised; this is an indication to the driver that an interrupt needs to be handled. Reading the value of the interrupt register clears the interrupt; once all interrupts are handled, the IRQ line goes down.

	== List of interrupts ==		== List of interrupts ==

Knuxify: Created page with "The BCM590xx PMIC exposes a series of interrupts. This page describes the operation of these interrupts. == Interrupt overview == The BCM59054 has '''128 IRQs'''; the BCM59056 has '''64 IRQs'''. On both chips, interrupt handling is the same. === Interrupt masking === Interrupts can be masked/unmasked by writing the relevant bit to `INTxMSK` registers. A value of `0` indicates that the interrupt is masked; a value of `1` indicates that..."

2025-01-31T18:30:32Z

Created page with "The BCM590xx PMIC exposes a series of interrupts. This page describes the operation of these interrupts. == Interrupt overview == The BCM59054 has '''128 IRQs'''; the BCM59056 has '''64 IRQs'''. On both chips, interrupt handling is the same. === Interrupt masking === Interrupts can be masked/unmasked by writing the relevant bit to <code>INTxMSK</code> registers. A value of <code>0</code> indicates that the interrupt is masked; a value of <code>1</code> indicates that..."

New page

The BCM590xx PMIC exposes a series of interrupts. This page describes the operation of these interrupts.

== Interrupt overview ==

The BCM59054 has '''128 IRQs'''; the BCM59056 has '''64 IRQs'''. On both chips, interrupt handling is the same.

=== Interrupt masking ===

Interrupts can be masked/unmasked by writing the relevant bit to <code>INTxMSK</code> registers. A value of <code>0</code> indicates that the interrupt is masked; a value of <code>1</code> indicates that the interrupt is unmasked.

=== Checking the status of an interrupt ===

Interrupts report their status in <code>INTx</code> registers.

== List of interrupts ==

TODO. See <code>enum bcmpmu59xxx_irq</code> in {{downstream|baffinlite|include/linux/mfd/bcmpmu59xxx.h}} in downstream for BCM59054 interrupts, <code>enum bcmpmu_irq</code> in {{downstream|baffinlite|include/linux/mfd/bcmpmu_56.h}} for BCM59056 interrupts.

== See also ==

* Relevant downstream drivers: {{downstream|baffinlite|drivers/mfd/bcmpmu59xxx-irq.c}}/{{downstream|baffinlite|drivers/mfd/bcmpmu-i2c-56.c}}, some bits in {{downstream|baffinlite|drivers/mfd/bcm590xx-core.c}} (BCM59055) may also be relevant
* IRQ lists are stored in the main headers: {{downstream|baffinlite|include/linux/mfd/bcmpmu59xxx.h}}/{{downstream|baffinlite|include/linux/mfd/bcmpmu_56.h}}

Mainline:Broadcom Kona/BCM590xx/Interrupts - Revision history

Knuxify: add info about irq chip