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| author | Dmitry Osipenko <digetx@gmail.com> | 2021-09-12 22:29:07 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2021-10-05 19:11:40 +0200 |
| commit | bdb1ffdad3b73e4d0538098fc02e2ea87a6b27cd (patch) | |
| tree | 72c1d3982bd3848dc7221844643b223e5f5212d9 /drivers/cpuidle | |
| parent | cpuidle: tegra: Enable compile testing (diff) | |
| download | linux-bdb1ffdad3b73e4d0538098fc02e2ea87a6b27cd.tar.xz linux-bdb1ffdad3b73e4d0538098fc02e2ea87a6b27cd.zip | |
cpuidle: tegra: Check whether PMC is ready
Check whether PMC is ready before proceeding with the cpuidle registration.
This fixes racing with the PMC driver probe order, which results in a
disabled deepest CC6 idling state if cpuidle driver is probed before the
PMC.
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/cpuidle-tegra.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c index 508bd9f23792..9845629aeb6d 100644 --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -337,6 +337,9 @@ static void tegra_cpuidle_setup_tegra114_c7_state(void) static int tegra_cpuidle_probe(struct platform_device *pdev) { + if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NOT_READY) + return -EPROBE_DEFER; + /* LP2 could be disabled in device-tree */ if (tegra_pmc_get_suspend_mode() < TEGRA_SUSPEND_LP2) tegra_cpuidle_disable_state(TEGRA_CC6); |