[PATCH 2/3] ARM: dts: sun8i: R40: Add PMU node
mripard at kernel.org
Thu Jan 2 01:32:11 PST 2020
On Thu, Jan 02, 2020 at 01:26:56AM +0000, Andre Przywara wrote:
> The ARM Cortex-A7 cores used in the Allwinner R40 SoC have their usual
> Performance Monitoring Unit (PMU), which allows perf to use hardware
> The SoC integrator just needs to connect each per-core interrupt line
> to the GIC. The R40 manual does not really mention those IRQ lines, but
> experimentation in U-Boot shows that interrupts 152-155 are connected to
> the four cores (similar to the A20).
> Tested on a Bananapi M2 Berry, with perf and taskset to confirm the
> association between cores and interrupts.
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
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