From cea931c25104e6bddc42eb067f58193f355dbdd7 Mon Sep 17 00:00:00 2001
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Fri, 10 Jan 2020 18:16:41 +0100
Subject: [PATCH] clocksource: davinci: only enable clockevents once tim34 is initialized
Git-commit: cea931c25104e6bddc42eb067f58193f355dbdd7
Patch-mainline: v5.6-rc1
References: git-fixes
The DM365 platform has a strange quirk (only present when using ancient
u-boot - mainline u-boot v2013.01 and later works fine) where if we
enable the second half of the timer in periodic mode before we do its
initialization - the time won't start flowing and we can't boot.
When using more recent u-boot, we can enable the timer, then reinitialize
it and all works fine.
To work around this issue only enable clockevents once tim34 is
initialized i.e. move clockevents_config_and_register() below tim34
initialization.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/clocksource/timer-davinci.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/clocksource/timer-davinci.c b/drivers/clocksource/timer-davinci.c
index 62745c962049..e421946a91c5 100644
--- a/drivers/clocksource/timer-davinci.c
+++ b/drivers/clocksource/timer-davinci.c
@@ -302,10 +302,6 @@ int __init davinci_timer_register(struct clk *clk,
return rv;
}
- clockevents_config_and_register(&clockevent->dev, tick_rate,
- DAVINCI_TIMER_MIN_DELTA,
- DAVINCI_TIMER_MAX_DELTA);
-
davinci_clocksource.dev.rating = 300;
davinci_clocksource.dev.read = davinci_clocksource_read;
davinci_clocksource.dev.mask =
@@ -323,6 +319,10 @@ int __init davinci_timer_register(struct clk *clk,
davinci_clocksource_init_tim34(base);
}
+ clockevents_config_and_register(&clockevent->dev, tick_rate,
+ DAVINCI_TIMER_MIN_DELTA,
+ DAVINCI_TIMER_MAX_DELTA);
+
rv = clocksource_register_hz(&davinci_clocksource.dev, tick_rate);
if (rv) {
pr_err("Unable to register clocksource");
--
2.16.4