From mboxrd@z Thu Jan 1 00:00:00 1970 From: srinivas.kandagatla@linaro.org (Srinivas Kandagatla) Date: Mon, 13 Apr 2015 17:18:09 +0100 Subject: [PATCH v4 1/3] genirq: Allow the irqchip state of an IRQ to be save/restored In-Reply-To: References: <1426676484-21812-1-git-send-email-marc.zyngier@arm.com> <1426676484-21812-2-git-send-email-marc.zyngier@arm.com> Message-ID: <552BEC41.3080909@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 08/04/15 18:48, Bjorn Andersson wrote: > On Wed, Mar 18, 2015 at 4:01 AM, Marc Zyngier 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 >> Tested-by: Bjorn Andersson >> Signed-off-by: Marc Zyngier >> --- > > Sorry for bothering you Thomas, but we have a couple of driver for the > Qualcomm platforms that depends on this patch (the line level part). +1 Couple of Qualcomm board support are left incomplete due to missing drivers using these patches. Would be nice to get this patch mainlined sooner. -srini > Could you please have a look at it? > > Thanks, > Bjorn > -- > To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >