Messages in this thread | | | From | Sudeep Holla <> | Date | Tue, 23 Jan 2018 18:15:17 +0000 | Subject | Re: [PATCH RFC 0/4] irqchip: qcom: add support for PDC interrupt controller |
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Hi Lina,
On Tue, Jan 23, 2018 at 5:56 PM, Lina Iyer <ilina@codeaurora.org> wrote: > On newer Qualcomm Techonologies Inc's SoCs like the SDM845, the GIC is in a > power domain that can be powered off when not needed. Interrupts that need to > be sensed even when the GIC is powered off, are routed through an interrupt > controller in an always-on domain called the Power Domain Controller a.k.a PDC. > This series adds support for the PDC's interrupt controller. >
Sorry for the basic questions:
1. Will the GIC be powered off in any other state other than System suspend ?
2. Why this needs to be done in Linux, why can't it be transparent and hidden in the firmware doing the actual GIC power down ? I assume Linux is not powering down the GIC.
3. I see some bits that enable secure interrupts in one of the patch. Is that even safe to allow Linux to enable some secure interrupts in PDC ?
-- Regards, Sudeep
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