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Commit 72cc6d71 authored by Eero Nurkkala's avatar Eero Nurkkala Committed by Mark Brown
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OMAP: McBSP: Let element DMA mode hit retention also 



The device no longer hits retention if element DMA
mode is taken for at least the duration of the
serial console timeout. Force element DMA mode to
shut down through smartidle.

Signed-off-by: default avatarEero Nurkkala <ext-eero.nurkkala@nokia.com>
Acked-by: default avatarEduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent fa3935ba

arch/arm/plat-omap/mcbsp.c

+9 −0
Original line number Diff line number Diff line
@@ -343,6 +343,15 @@ static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) 


		syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON);

		syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03));

		/*

		 * HW bug workaround - If no_idle mode is taken, we need to

		 * go to smart_idle before going to always_idle, or the

		 * device will not hit retention anymore.

		 */

		syscon |= SIDLEMODE(0x02);

		OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon);



		syscon &= ~(SIDLEMODE(0x03));

		OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon);



		OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, 0);