Commit 78c43af2 authored Mar 20, 2017 by Oliver Neukum Committed by Wolfram Sang Mar 22, 2017

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>

parent a528fab6

drivers/i2c/busses/i2c-designware-baytrail.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)

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