linux-kernel - [PATCH v1 6/6] cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER

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Date:   Mon,  8 Jul 2019 02:38:09 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 6/6] cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER_STOP from all states

The Tegra's clocksource driver got some rework recently and now the
internal/local CPU timers usage is discouraged on Tegra20/30 SoCs in
a favor of the platform-specific timers that are assigned as per-CPU
clocksources because they do not suffer from the CPU-freq changes and
are always-ON during of CPU-idling. That happened in the commit
f6d50ec5f85c ("clocksource/drivers/tegra: Support per-CPU timers on all
Tegra's"). The Tegra's clocksource driver is the essential arch-driver
that is guaranteed to always present on all Tegra SoCs up to Tegra124.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/cpuidle/cpuidle-tegra.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c
index 464b2376905a..e2aa46231c05 100644
--- a/drivers/cpuidle/cpuidle-tegra.c
+++ b/drivers/cpuidle/cpuidle-tegra.c
@@ -143,7 +143,6 @@ static struct cpuidle_driver tegra_idle_driver = {
 			.exit_latency		= 2000,
 			.target_residency	= 2200,
 			.power_usage		= 0,
-			.flags			= CPUIDLE_FLAG_TIMER_STOP,
 			.name			= "powered-down",
 			.desc			= "CPU core powered-off",
 		},
@@ -152,8 +151,7 @@ static struct cpuidle_driver tegra_idle_driver = {
 			.exit_latency		= 5000,
 			.target_residency	= 10000,
 			.power_usage		= 0,
-			.flags			= CPUIDLE_FLAG_COUPLED |
-						  CPUIDLE_FLAG_TIMER_STOP,
+			.flags			= CPUIDLE_FLAG_COUPLED,
 			.name			= "powered-down",
 			.desc			= "CPU cluster powered-off",
 		},
-- 
2.22.0