From: Dmitry Osipenko <digetx@gmail.com>
To: "Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Peter De Schrijver" <pdeschrijver@nvidia.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"Daniel Lezcano" <daniel.lezcano@linaro.org>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v9 02/17] ARM: tegra: Add tegra_pm_park_secondary_cpu()
Date: Thu, 19 Dec 2019 00:04:48 +0300 [thread overview]
Message-ID: <20191218210503.6689-3-digetx@gmail.com> (raw)
In-Reply-To: <20191218210503.6689-1-digetx@gmail.com>
This function resembles tegra_cpu_die() of the hotplug code, but
this variant is more suitable to be used for CPU PM because it's made
specifically to be used by cpu_suspend(). In short this function puts
secondary CPU offline, it will be used by the new CPUIDLE driver.
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
arch/arm/mach-tegra/pm.c | 14 ++++++++++++++
arch/arm/mach-tegra/pm.h | 5 +++++
2 files changed, 19 insertions(+)
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index 3cab81b82866..f5ff3dd1dd81 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -436,4 +436,18 @@ void __init tegra_init_suspend(void)
suspend_set_ops(&tegra_suspend_ops);
}
+
+int tegra_pm_park_secondary_cpu(unsigned long cpu)
+{
+ if (cpu > 0) {
+ tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
+
+ if (tegra_get_chip_id() == TEGRA20)
+ tegra20_hotplug_shutdown();
+ else
+ tegra30_hotplug_shutdown();
+ }
+
+ return -EINVAL;
+}
#endif
diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h
index 569151b3edc0..9a790f00237f 100644
--- a/arch/arm/mach-tegra/pm.h
+++ b/arch/arm/mach-tegra/pm.h
@@ -31,8 +31,13 @@ extern void (*tegra_tear_down_cpu)(void);
#ifdef CONFIG_PM_SLEEP
void tegra_init_suspend(void);
+int tegra_pm_park_secondary_cpu(unsigned long cpu);
#else
static inline void tegra_init_suspend(void) {}
+static inline int tegra_pm_park_secondary_cpu(unsigned long cpu)
+{
+ return -ENOTSUPP;
+}
#endif
#endif /* _MACH_TEGRA_PM_H_ */
--
2.24.0
next prev parent reply other threads:[~2019-12-18 21:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 21:04 [PATCH v9 00/17] Consolidate and improve NVIDIA Tegra CPUIDLE driver(s) Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 01/17] ARM: tegra: Compile sleep-tegra20/30.S unconditionally Dmitry Osipenko
2019-12-18 21:04 ` Dmitry Osipenko [this message]
2019-12-18 21:04 ` [PATCH v9 03/17] ARM: tegra: Remove pen-locking from cpuidle-tegra20 Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 04/17] ARM: tegra: Change tegra_set_cpu_in_lp2() type to void Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 05/17] ARM: tegra: Propagate error from tegra_idle_lp2_last() Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 06/17] ARM: tegra: Expose PM functions required for new cpuidle driver Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 07/17] ARM: tegra: Rename some of the newly exposed PM functions Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 08/17] ARM: tegra: Make outer_disable() open-coded Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 09/17] arm: tegra20: cpuidle: Handle case where secondary CPU hangs on entering LP2 Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 10/17] arm: tegra20: cpuidle: Make abort_flag atomic Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 11/17] arm: tegra20/30: cpuidle: Remove unnecessary memory barrier Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 12/17] cpuidle: Refactor and move out NVIDIA Tegra20 driver into drivers/cpuidle Dmitry Osipenko
2019-12-18 21:04 ` [PATCH v9 13/17] cpuidle: tegra: Squash Tegra30 driver into the common driver Dmitry Osipenko
2019-12-18 21:05 ` [PATCH v9 14/17] cpuidle: tegra: Squash Tegra114 " Dmitry Osipenko
2019-12-18 21:05 ` [PATCH v9 15/17] cpuidle: tegra: Disable CC6 state if LP2 unavailable Dmitry Osipenko
2019-12-18 21:05 ` [PATCH v9 16/17] ARM: multi_v7_defconfig: Enable Tegra cpuidle driver Dmitry Osipenko
2019-12-18 21:05 ` [PATCH v9 17/17] ARM: tegra: Enable Tegra cpuidle driver in tegra_defconfig Dmitry Osipenko
2020-01-07 23:14 ` [PATCH v9 00/17] Consolidate and improve NVIDIA Tegra CPUIDLE driver(s) Dmitry Osipenko
2020-02-12 23:51 Dmitry Osipenko
2020-02-12 23:51 ` [PATCH v9 02/17] ARM: tegra: Add tegra_pm_park_secondary_cpu() Dmitry Osipenko
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