16.10.2019 22:47, Dmitry Osipenko пишет: > 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? > Or maybe you're suggesting to change the names everywhere and not only in the cpuidle driver? Please clarify :)
