From bdb1ffdad3b73e4d0538098fc02e2ea87a6b27cd Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Sun, 12 Sep 2021 23:29:07 +0300 Subject: 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 Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding --- drivers/cpuidle/cpuidle-tegra.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/cpuidle') 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); -- cgit v1.2.3