linux-kernel - [PATCH v8 17/19] cpuidle: tegra: Disable CC6 state if LP2 unavailable

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Date:   Tue,  3 Dec 2019 03:41:14 +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 v8 17/19] cpuidle: tegra: Disable CC6 state if LP2 unavailable

LP2 suspending could be unavailable, for example if it is disabled in a
device-tree. CC6 cpuidle state won't work in that case.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/cpuidle/cpuidle-tegra.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c
index bbd7999a3910..077ff15e32fb 100644
--- a/drivers/cpuidle/cpuidle-tegra.c
+++ b/drivers/cpuidle/cpuidle-tegra.c
@@ -31,6 +31,7 @@
 #include <soc/tegra/fuse.h>
 #include <soc/tegra/irq.h>
 #include <soc/tegra/pm.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/cpuidle.h>
 #include <asm/firmware.h>
@@ -325,6 +326,10 @@ static void tegra_cpuidle_setup_tegra114_c7_state(void)
 
 static int tegra_cpuidle_probe(struct platform_device *pdev)
 {
+	/* LP2 could be disabled in device-tree */
+	if (tegra_pmc_get_suspend_mode() < TEGRA_SUSPEND_LP2)
+		tegra_idle_driver.states[TEGRA_CC6].disabled = true;
+
 	/*
 	 * Required suspend-resume functionality, which is provided by the
 	 * Tegra-arch core and PMC driver, is unavailable if PM-sleep option
-- 
2.24.0