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[4/4] ARM: OMAP: board-omap3beagle: set i2c-3 to 100kHz

Message ID 20090304183029.27331.54848.stgit@localhost (mailing list archive)
State RFC
Delegated to: Tony Lindgren
Headers show

Commit Message

Tony Lindgren March 4, 2009, 6:30 p.m. UTC
From: Koen Kooi <koen@beagleboard.org>

Changing it do 100kHz is needed to make more devices works properly. Controlling the
TI DLP Pico projector[1] doesn't work properly at 400kHz, 100kHz and lower work fine.
EDID readout is unaffected by this change.

[1] http://focus.ti.com/dlpdmd/docs/dlpdiscovery.tsp?sectionId=60&tabId=2234

Signed-off-by: Koen Kooi <koen@beagleboard.org>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
 arch/arm/mach-omap2/board-omap3beagle.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

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diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 38c88fb..e39cd2c 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -178,7 +178,9 @@  static int __init omap3_beagle_i2c_init(void)
 	omap_register_i2c_bus(2, 400, NULL, 0);
-	omap_register_i2c_bus(3, 400, NULL, 0);
+	/* Bus 3 is attached to the DVI port where devices like the pico DLP
+	 * projector don't work reliably with 400kHz */
+	omap_register_i2c_bus(3, 100, NULL, 0);
 	return 0;