From: Dmitry Osipenko <digetx@gmail.com>
Date: Mon, 3 Jun 2019 18:59:41 +0000 (+0300)
Subject: clocksource/drivers/tegra: Reset hardware state on init
X-Git-Tag: v5.3-rc1~211^2~6^2~17
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77d57d1d8016696daaf5614c070ac01c9652f4ce;p=thirdparty%2Fkernel%2Flinux.git

clocksource/drivers/tegra: Reset hardware state on init

Reset timer's hardware state to ensure that initially it is in a
predictable state.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---

diff --git a/drivers/clocksource/timer-tegra20.c b/drivers/clocksource/timer-tegra20.c
index acd68c77fa910..3e4f12aee8df1 100644
--- a/drivers/clocksource/timer-tegra20.c
+++ b/drivers/clocksource/timer-tegra20.c
@@ -123,6 +123,9 @@ static int tegra_timer_setup(unsigned int cpu)
 {
 	struct timer_of *to = per_cpu_ptr(&tegra_to, cpu);
 
+	writel(0, timer_of_base(to) + TIMER_PTV);
+	writel(TIMER_PCR_INTR_CLR, timer_of_base(to) + TIMER_PCR);
+
 	irq_force_affinity(to->clkevt.irq, cpumask_of(cpu));
 	enable_irq(to->clkevt.irq);