Re: [PATCH 4/5] arm64: dts: allwinner: Add sun4i MMIO timer nodes

2021-03-15 Thread Samuel Holland
On 3/15/21 1:32 PM, Jernej Škrabec wrote: > Hi! > > Dne ponedeljek, 15. marec 2021 ob 05:32:49 CET je Samuel Holland napisal(a): >> For a CPU to enter an idle state, there must be some timer which can >> trigger an IRQ to wake it back up. The local ARM architectural timer is >> not sufficient,

Re: [PATCH 4/5] arm64: dts: allwinner: Add sun4i MMIO timer nodes

2021-03-15 Thread Jernej Škrabec
Hi! Dne ponedeljek, 15. marec 2021 ob 05:32:49 CET je Samuel Holland napisal(a): > For a CPU to enter an idle state, there must be some timer which can > trigger an IRQ to wake it back up. The local ARM architectural timer is > not sufficient, because that timer stops when the CPU is powered

[PATCH 4/5] arm64: dts: allwinner: Add sun4i MMIO timer nodes

2021-03-14 Thread Samuel Holland
For a CPU to enter an idle state, there must be some timer which can trigger an IRQ to wake it back up. The local ARM architectural timer is not sufficient, because that timer stops when the CPU is powered down. Some other CPU's ARM architectural timer can be used, but this prevents that other CPU