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i2c-designware: increase timeout of semaphore transfer 

Our testing shows the semaphore failing to be transferred on CherryTrail
in about 0.5% of all cases. The existing timeout needs to be lengthened
to accommodate the worst cases.

V2: Rebased on https://cgit.freedesktop.org/drm-intel/commit/?h=topic/designware-baytrail

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Oliver Neukum 2017-03-20 14:37:30 +01:00 committed by Wolfram Sang
parent a528fab6cc
commit 78c43af2c1
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/busses/i2c-designware-baytrail.c
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@ -22,7 +22,7 @@
#include "i2c-designware-core.h"
#define SEMAPHORE_TIMEOUT 100
#define SEMAPHORE_TIMEOUT 500
#define PUNIT_SEMAPHORE 0x7
#define PUNIT_SEMAPHORE_CHT 0x10e
#define PUNIT_SEMAPHORE_BIT BIT(0)