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OMAP: McBSP: Use appropriate value for startup delay

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Increasing startup delay value as worst case:
 CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec

Although, 100us may give enough time for two CLKSRG,
due to some unknown PM related, clock gating etc. reason,
this patch increases it to 500us.

Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Eduardo Valentin 2009-08-20 16:18:09 +03:00 committed by Mark Brown
parent 946a49a95d
commit 44a6311c0a
1 changed files with 7 additions and 1 deletions
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8
arch/arm/plat-omap/mcbsp.c
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@ -365,7 +365,13 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
w = OMAP_MCBSP_READ(io_base, SPCR1);
OMAP_MCBSP_WRITE(io_base, SPCR1, w | (rx & 1));
udelay(100);
/*
* Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
* REVISIT: 100us may give enough time for two CLKSRG, however
* due to some unknown PM related, clock gating etc. reason it
* is now at 500us.
*/
udelay(500);
if (idle) {
/* Start frame sync */