Re: [PATCH] ARM: tegra: Fix restoration of PLLM when exiting suspend
From: Peter De Schrijver <hidden>
Date: 2019-12-11 08:50:21
Also in:
linux-tegra, stable
On Tue, Dec 10, 2019 at 11:29:42PM +0300, Dmitry Osipenko wrote:
External email: Use caution opening links or attachments 10.12.2019 22:28, Dmitry Osipenko пишет:quoted
Hello Jon, PLLM's enable-status could be defined either by PMC or CaR. Thus at first you need to check whether PMC overrides CaR's enable and then judge the enable state based on PMC or CaR state respectively.Actually, now I think that it doesn't make sense to check PMC WB0 state at all. IIUC, PLLM's state of the WB0 register defines whether Boot ROM should enable PLLM on resume from suspend. Thus it will be correct to check only the CaR's enable-state of PLLM. I'm not sure what's the idea of WB0 overriding, maybe to resume faster. Peter, could you please clarify that?
I don't know why these overriding bits exist. The code for them was in the downstream driver so I implemented the same in the upstream driver :) Peter. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel