From 859a6f6ee15ee8931da40fae31fdea73a5e72192 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Tue, 25 Feb 2020 01:40:42 +0300
Subject: ARM: tegra: Add tegra_pm_park_secondary_cpu()

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>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Jasper Korten <jja2000@gmail.com>
Tested-by: David Heidelberg <david@ixit.cz>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 arch/arm/mach-tegra/pm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'arch/arm/mach-tegra/pm.c')

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
-- 
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