lkml.org 
[lkml]   [2019]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 4/6] cpuidle: tegra: Support CPU cluster power-down on Tegra30
Date
The new CPU Idle driver has all necessary features in order to allow
the deepest idling state on Tegra30 SoC where the whole CPU cluster is
power-gated using the coupled idle state.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---

Please note that outer_disable() has a WARN_ON(num_online_cpus > 1)
and it doesn't know that we turned off those secondary CPUs, hence the
outer_cache.disable() is now invoked directly.

arch/arm/mach-tegra/pm.c | 4 ++--
drivers/cpuidle/cpuidle-tegra.c | 4 +---
2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index f9c9bce9e15d..cc941b0c97e8 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -146,8 +146,8 @@ static int tegra_sleep_cpu(unsigned long v2p)
* if any of secondary CPU's is online and this is the LP2-idle
* code-path only for Tegra20/30.
*/
- if (trusted_foundations_registered())
- outer_disable();
+ if (trusted_foundations_registered() && outer_cache.disable)
+ outer_cache.disable();

/*
* Note that besides of setting up CPU reset vector this firmware
diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c
index 3fad4a0cbc78..31eeef22c0ff 100644
--- a/drivers/cpuidle/cpuidle-tegra.c
+++ b/drivers/cpuidle/cpuidle-tegra.c
@@ -202,10 +202,8 @@ static int tegra_cpuidle_probe(struct platform_device *pdev)
switch (tegra_get_chip_id()) {
case TEGRA20:
tegra_idle_driver.states[1].disabled = true;
- tegra_idle_driver.states[3].disabled = true;
- break;
+ /* fall through */
case TEGRA30:
- tegra_idle_driver.states[2].disabled = true;
tegra_idle_driver.states[3].disabled = true;
break;
case TEGRA114:
--
2.22.0
\
 
 \ /
  Last update: 2019-07-08 01:39    [W:1.534 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site