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[91.78.220.99]) by smtp.gmail.com with ESMTPSA id i13sm58897736wrr.73.2019.07.30.10.10.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 30 Jul 2019 10:10:04 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Peter De Schrijver , "Rafael J. Wysocki" , Daniel Lezcano Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 00/13] Consolidate and improve NVIDIA Tegra CPUIDLE driver(s) Date: Tue, 30 Jul 2019 20:09:42 +0300 Message-Id: <20190730170955.11987-1-digetx@gmail.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, I was spending quite some time recently trying to hunt down CPU-suspend bug on Tegra30 SoC and in the end it was nailed. During that time I realized that the CPU Idle drivers could get some polish and gain new features, thus that's what this series does: 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 driver(s) and of the Tegra's arch code in general. Please review, thanks! Changelog: 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. Dmitry Osipenko (13): ARM: tegra: Remove cpuidle drivers to replace them with a new driver ARM: tegra: Change tegra_set_cpu_in_lp2() type to void ARM: tegra: Propagate error from tegra_idle_lp2_last() ARM: tegra: Compile sleep-tegra20/30.S unconditionally ARM: tegra: Expose PM functions required for new cpuidle driver ARM: tegra: Rename some of the newly exposed PM functions ARM: tegra: Add tegra_pm_park_secondary_cpu() clk: tegra: Add missing stubs for the case of !CONFIG_PM_SLEEP cpuidle: Introduce unified driver for NVIDIA Tegra SoCs cpuidle: tegra: Support CPU cluster power-down state on Tegra30 ARM: tegra: Create simple platform device for cpuidle driver ARM: multi_v7_defconfig: Enable Tegra cpuidle driver ARM: tegra: Enable Tegra cpuidle driver in tegra_defconfig arch/arm/configs/multi_v7_defconfig | 1 + arch/arm/configs/tegra_defconfig | 1 + arch/arm/mach-tegra/Makefile | 23 +- arch/arm/mach-tegra/cpuidle-tegra114.c | 89 ----- arch/arm/mach-tegra/cpuidle-tegra20.c | 212 ----------- arch/arm/mach-tegra/cpuidle-tegra30.c | 132 ------- arch/arm/mach-tegra/cpuidle.c | 50 --- arch/arm/mach-tegra/cpuidle.h | 21 -- arch/arm/mach-tegra/irq.c | 3 +- arch/arm/mach-tegra/pm.c | 50 +-- arch/arm/mach-tegra/pm.h | 4 - arch/arm/mach-tegra/reset-handler.S | 11 - arch/arm/mach-tegra/reset.h | 9 +- arch/arm/mach-tegra/sleep-tegra20.S | 170 --------- arch/arm/mach-tegra/sleep-tegra30.S | 6 +- arch/arm/mach-tegra/sleep.h | 15 - arch/arm/mach-tegra/tegra.c | 7 +- drivers/cpuidle/Kconfig.arm | 8 + drivers/cpuidle/Makefile | 1 + drivers/cpuidle/cpuidle-tegra.c | 348 ++++++++++++++++++ drivers/soc/tegra/Kconfig | 1 - include/linux/clk/tegra.h | 13 + include/soc/tegra/cpuidle.h | 2 +- .../mach-tegra => include/soc/tegra}/irq.h | 8 +- include/soc/tegra/pm.h | 31 ++ 25 files changed, 452 insertions(+), 764 deletions(-) delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra114.c delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra20.c delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra30.c delete mode 100644 arch/arm/mach-tegra/cpuidle.c delete mode 100644 arch/arm/mach-tegra/cpuidle.h create mode 100644 drivers/cpuidle/cpuidle-tegra.c rename {arch/arm/mach-tegra => include/soc/tegra}/irq.h (59%) -- 2.22.0