16.10.2019 22:21, Peter De Schrijver пишет: > On Tue, Oct 15, 2019 at 07:59:57PM +0300, Dmitry Osipenko wrote: >> Hello, >> >> This series does the following: >> >> 1. Unifies Tegra20/30/114 drivers into a single driver and moves it out >> into common drivers/cpuidle/ directory. >> >> 2. Enables CPU cluster power-down idling state on Tegra30. >> >> In the end there is a quite nice clean up of the Tegra CPUIDLE drivers >> and of the Tegra's arch code in general. Please review, thanks! >> >> Changelog: >> >> v6: - Addressed request from Thierry Reding to change the way patches are >> organized by making changes in a more incremental manner. >> >> - tegra_sleep_cpu() now checks for the secondary CPUs to be offline >> in the "Make outer_disable() open-coded" patch. >> >> v5: - Rebased on a recent linux-next, fixed one minor conflict in Kconfig. >> >> - Improved commit's message of the "Support CPU cluster power-down state >> on Tegra30" patch. >> >> - The "Support CPU cluster power-down state on Tegra30" patch is also >> got split and now there is additional "Make outer_disable() open-coded" >> patch. >> >> - Made minor cosmetic changes to the "Introduce unified driver for >> NVIDIA Tegra SoCs" patch by improving error message and renaming >> one variable. >> >> v4: - Fixed compilation with !CONFIG_CACHE_L2X0 (and tested that it still >> works). >> >> - Replaced ktime_compare() with ktime_before() in the new driver, >> for consistency. >> >> v3: - Addressed review comments that were made by Jon Hunter to v2 by >> splitting patches into smaller (and simpler) chunks, better >> documenting changes in the commit messages and using proper error >> codes in the code. >> >> Warnings are replaced with a useful error messages in the code of >> "Introduce unified driver for NVIDIA Tegra SoCs" patch. >> >> Secondary CPUs parking timeout increased to 100ms because I found >> that it actually may happen to take more than 1ms if CPU is running >> on a *very* low frequency. >> >> Added diagnostic messages that are reporting Flow Controller state >> when CPU parking fails. >> >> Further polished cpuidle driver's code. >> >> The coupled state entering is now aborted if there is a pending SGI >> (Software Generated Interrupt) because it will be lost after GIC's >> power-cycling. Like it was done by the old Tegra20 CPUIDLE driver. >> >> v2: - Added patches to enable the new cpuidle driver in the defconfigs: >> >> ARM: multi_v7_defconfig: Enable Tegra cpuidle driver >> ARM: tegra: Enable Tegra cpuidle driver in tegra_defconfig >> >> - Dropped patches that removed CPUIDLE_FLAG_TIMER_STOP from the idling >> states because that flag actually doesn't have any negative effects, >> but still is correct for the case of a local CPU timer on older Tegra >> SoCs: >> >> cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER_STOP from Tegra114/124 idle-state >> cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER_STOP from all states >> >> - The "Add unified driver for NVIDIA Tegra SoCs" patch got more polish. >> Tegra30 and Terga114 states are now squashed into a single common C7 >> state (following Parker TRM terminology, see 17.2.2.2 Power Management >> States), more comments added, etc minor changes. > > It would be useful to switch the power state terminology to the one used > for later chips: > > LP0 becomes SC7 > LP1 becomes C1 > LP2 becomes CC7 > > Meaning of these states is as follows > > C is a core state: > > C1 clock gating > C2 not defined > C3 not defined > C4 not defined > C5 not defined > C6 not defined for ARM cores > C7 power-gating > > CC is a CPU cluster C state: > > CC1 cluster clock gated > CC2 not defined > CC3 fmax@Vmin: not used prior to Tegra186 > CC4: cluster retention: no longer supported > CC5: not defined > CC6: cluster power gating > CC7: cluster rail gating > > SC is a System C state: > > SC1: not defined > SC2: not defined > SC3: not defined > SC4: not defined > SC5: not defined > SC6: not defined > SC7: VDD_SOC off Hello Peter, But new "drivers/cpuidle/cpuidle-tegra.c" uses exactly that terminology, please see "cpuidle: Refactor and move NVIDIA Tegra20 driver into drivers/cpuidle/" and further patches. Am I missing something? Or do you want the renaming to be a separate patch?
