Commit 44a6311c authored Aug 20, 2009 by Eduardo Valentin Committed by Mark Brown Aug 20, 2009

OMAP: McBSP: Use appropriate value for startup delay



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>

parent 946a49a9

arch/arm/plat-omap/mcbsp.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -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: CLKSRG2 = 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 */