Messages in this thread | | | Date | Fri, 06 Feb 2015 09:02:09 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH v3 1/3] genirq: Allow the irqchip state of an IRQ to be save/restored |
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On 05/02/15 23:33, Bjorn Andersson wrote: > On Wed, Jan 7, 2015 at 9:51 AM, Marc Zyngier <marc.zyngier@arm.com> wrote: >> There is a number of cases where a kernel subsystem may want to >> introspect the state of an interrupt at the irqchip level: >> >> - When a peripheral is shared between virtual machines, >> its interrupt state becomes part of the guest's state, >> and must be switched accordingly. KVM on arm/arm64 requires >> this for its guest-visible timer >> - Some GPIO controllers seem to require peeking into the >> interrupt controller they are connected to to report >> their internal state >> >> This seem to be a pattern that is common enough for the core code >> to try and support this without too many horrible hacks. Introduce >> a pair of accessors (irq_get_irqchip_state/irq_set_irqchip_state) >> to retrieve the bits that can be of interest to another subsystem: >> pending, active, and masked. >> >> - irq_get_irqchip_state returns the state of the interrupt according >> to a parameter set to IRQCHIP_STATE_PENDING, IRQCHIP_STATE_ACTIVE, >> IRQCHIP_STATE_MASKED or IRQCHIP_STATE_LINE_LEVEL. >> - irq_set_irqchip_state similarly sets the state of the interrupt. >> >> Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> >> Tested-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> >> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> > > Any update on the status of this? > > I would like to be able to move ahead with the pinctrl driver for the > Qualcomm PM8921 pmic, that depends on this being in place.
None so far.
Thomas, do you have any comment on this one?
Thanks,
M. -- Jazz is not dead. It just smells funny...
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