Skip to contentSkip to conversation

board-omap3beagle: set i2c-3 to 100kHz

PATCH In review Koen Kooi 5 participants 7 messages Jan 25, 2009 – Feb 20, 2009

Subsystems (3)
Arm (32-bit) Arm sub-architectures OMAP2+ support
lore
Share & tools
lore

Koen Kooi

author
#0 lore raw

PATCH v2 1/1 board-omap3beagle: set i2c-3 to 100kHz

From: Koen Kooi <[email protected]>

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 <[email protected]>
---
 arch/arm/mach-omap2/board-omap3beagle.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
arch/arm/mach-omap2/board-omap3beagle.c +3 -1
index fe97bab..f7a6f7d 100644
@@ -227,7 +227,9 @@ static int __init omap3_beagle_i2c_init(void)
 #ifdef CONFIG_I2C2_OMAP_BEAGLE
 	omap_register_i2c_bus(2, 400, NULL, 0);
 #endif
-	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;
 }
Signature · 1 line
1.5.6.5
Acked-by on v2 1/1
#1 lore raw
Quoted 7 lines · Koen Kooi

From: Koen Kooi <[email protected]>

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 <[email protected]>
Acked-by David Brownell <[email protected]>

:)

Quoted 28 lines
---
 arch/arm/mach-omap2/board-omap3beagle.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
arch/arm/mach-omap2/board-omap3beagle.c +3 -1
index fe97bab..f7a6f7d 100644
@@ -227,7 +227,9 @@ static int __init omap3_beagle_i2c_init(void)
 #ifdef CONFIG_I2C2_OMAP_BEAGLE
 	omap_register_i2c_bus(2, 400, NULL, 0);
 #endif
-	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;
 }
Signature · 6 lines
1.5.6.5

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
#2 lore raw

Op 25 jan 2009, om 13:04 heeft David Brownell het volgende geschreven:

Quoted 10 lines · Koen Kooi
Quoted 7 lines

From: Koen Kooi <[email protected]>

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 <[email protected]>
Acked-by David Brownell <[email protected]>

ping

#3 lore raw

Op 4 feb 2009, om 20:58 heeft Koen Kooi het volgende geschreven:

Quoted 8 lines

Op 25 jan 2009, om 13:04 heeft David Brownell het volgende geschreven:

Quoted 5 lines · Koen Kooi
Quoted 4 lines

From: Koen Kooi <[email protected]>

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.

Quoted 7 lines
Quoted 5 lines
Quoted 3 lines

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

Signed-off-by Koen Kooi <[email protected]>
Acked-by David Brownell <[email protected]>

ping

Any more changes needed before this can go in?

regards,

Koen

maintainer
#4 lore raw
Quoted 16 lines · Koen Kooi

Op 4 feb 2009, om 20:58 heeft Koen Kooi het volgende geschreven:

Quoted 13 lines

Op 25 jan 2009, om 13:04 heeft David Brownell het volgende geschreven:

Quoted 10 lines · Koen Kooi
Quoted 9 lines

From: Koen Kooi <[email protected]>

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

Quoted 7 lines
Quoted 5 lines
Quoted 3 lines
Quoted 1 line
Signed-off-by Koen Kooi <[email protected]>
Acked-by David Brownell <[email protected]>

ping

Any more changes needed before this can go in?

Just few more days, I'll need to get my upstream queues ready.. Otherwise I'll forget to apply it somewhere :)

Tony

maintainer
#5 lore raw
Quoted 19 lines · Tony Lindgren
Quoted 18 lines · Koen Kooi

Op 4 feb 2009, om 20:58 heeft Koen Kooi het volgende geschreven:

Quoted 15 lines

Op 25 jan 2009, om 13:04 heeft David Brownell het volgende geschreven:

Quoted 12 lines · Koen Kooi
Quoted 10 lines

From: Koen Kooi <[email protected]>

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 <[email protected]>
Quoted 8 lines
Quoted 5 lines
Quoted 3 lines
Quoted 1 line
Acked-by David Brownell <[email protected]>

ping

Any more changes needed before this can go in?

Just few more days, I'll need to get my upstream queues ready.. Otherwise I'll forget to apply it somewhere :)

OK, adding to omap-fixes and pushing to linux-omap.

Tony

#6 lore raw

Op 20 feb 2009, om 17:25 heeft Tony Lindgren het volgende geschreven:

Quoted 22 lines · Tony Lindgren
Quoted 21 lines · Koen Kooi
Quoted 20 lines

Op 4 feb 2009, om 20:58 heeft Koen Kooi het volgende geschreven:

Quoted 17 lines

Op 25 jan 2009, om 13:04 heeft David Brownell het volgende geschreven:

Quoted 13 lines · Koen Kooi
Quoted 10 lines

From: Koen Kooi <[email protected]>

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 <[email protected]>
Acked-by David Brownell <[email protected]>
Quoted 8 lines
Quoted 6 lines
Quoted 3 lines
Quoted 1 line

ping

Any more changes needed before this can go in?

Just few more days, I'll need to get my upstream queues ready.. Otherwise I'll forget to apply it somewhere :)

OK, adding to omap-fixes and pushing to linux-omap.

Thanks!