On 01/17, Geert Uytterhoeven wrote: > Hi Mike, Stephen, > > This patch series adds support for the CLK_IS_CRITICAL flag to drivers > for module clocks on Renesas ARM SoCs. For now, this is used to prevent > disabling of the ARM GIC module clock, which would lead to a system > lock-up when accessing the GIC's registers. > > 1. The first patch migrates the Renesas CPG/MSSR driver from the > never merged CLK_ENABLE_HAND_OFF flag to the CLK_IS_CRITICAL flag. > Note that as the driver already handled critical clocks (i.e. it > ignored them :-), this is not a prerequisite for linking the GIC to > its module clock in DT. > > 2. The second patch makes sure the CLK_IS_CRITICAL flag is set for the > INTC-SYS clock on SoCs not (yet) using the Renesas CPG/MSSR driver. > Note that this is a hard dependency for describing the INTC-SYS > clock in DT on R-Mobile APE6 and R-Car Gen2. > > I plan to queue these patches in my clk-renesas-for-v4.11 branch, if > you agree. > Would the runtime PM patches for ccf make things any better here? I still plan to support CLK_ENABLE_HAND_OFF somehow, but it's not at the top of my priority list right now. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
