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ARM: OMAP3: PM: Move IO Daisychain function to omap3 prm file

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Since IO Daisychain modifies only PRM registers, it makes sense to move
it to PRM File. Also changed the timeout value for IO chain enable to
100us and added a wait for status disable at the end.

Thanks to Nishanth Menon <nm@ti.com> for contributing a fix to the
timeout code waiting for WUCLKOUT to go high.

Signed-off-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Reviewed-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: renamed omap3_trigger_io_chain() to better describe the
 end result and to match other PRM functions; removed
 omap3_disable_io_chain(); moved MAX_IOPAD_LATCH_TIME to prcm-common as it
 will also be used by the OMAP4 code; removed unnecessary barrier;
 added kerneldoc; added credit for fix from Nishanth]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Vishwanath BS
2012-06-22 08:40:02 -06:00
committed by Paul Walmsley
parent fe7ea0062f
commit 09659fa72b
4 changed files with 43 additions and 33 deletions
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8
arch/arm/mach-omap2/prcm-common.h
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@@ -410,6 +410,14 @@
*/
#define MAX_MODULE_HARDRESET_WAIT 10000
/*
* Maximum time(us) it takes to output the signal WUCLKOUT of the last
* pad of the I/O ring after asserting WUCLKIN high. Tero measured
* the actual time at 7 to 8 microseconds on OMAP3 and 2 to 4
* microseconds on OMAP4, so this timeout may be too high.
*/
#define MAX_IOPAD_LATCH_TIME 100
# ifndef __ASSEMBLER__
extern void __iomem *prm_base;
extern void __iomem *cm_base;