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timer: orion-timer: Fix problem in early_init_done()

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It was noticed that Clearfog is currently broken with this newly
introduced early_init_done() function. Apparently the timer is enabled
here when U-Boot is run but not configured - at least not correctly.
Resulting in a hangup in the timer reading functions.

To fix this, also read the value of the reload register and check it's
value with the one written to by U-Boot. Only if this matches, the
init has already been done.

Fixes: 5387b093cb ("timer: orion-timer: Fix problem with early static variable")
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Pali Rohár <pali@kernel.org>
Cc: Martin Rowe <martin.p.rowe@gmail.com>
Cc: Tony Dinh <mibodhi@gmail.com>
Cc: Pali Rohár <pali@kernel.org>
Cc: Michael Walle <michael@walle.cc>
This commit is contained in:
Stefan Roese 2023-01-16 09:01:48 +01:00
parent 348064ee2c
commit 9a13a76e62
1 changed files with 2 additions and 1 deletions
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3
drivers/timer/orion-timer.c
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@ -25,7 +25,8 @@ struct orion_timer_priv {
static bool early_init_done(void *base)
{
if (readl(base + TIMER_CTRL) & TIMER0_EN)
if ((readl(base + TIMER_CTRL) & TIMER0_EN) &&
(readl(base + TIMER0_RELOAD) == ~0))
return true;
return false;
}