subject:"\[U\-Boot\] \[PATCH V2\] mpc5200\: reduce delays in i2c"

Re: [U-Boot] [PATCH V2] mpc5200: reduce delays in i2c

2009-03-31 Thread Jon Smirl

On Tue, Mar 31, 2009 at 4:54 PM, Wolfgang Denk wrote: > Dear Jon Smirl, > > In message <20090331010330.20946.41742.st...@localhost> you wrote: >> Make the i2c delays smaller. The measured delay is 55us at >> 100Khz. Set the delay to 15us which should work for 400Khz. >> 100Khz will loop four times

Re: [U-Boot] [PATCH V2] mpc5200: reduce delays in i2c

2009-03-31 Thread Wolfgang Denk

Dear Jon Smirl, In message <20090331010330.20946.41742.st...@localhost> you wrote: > Make the i2c delays smaller. The measured delay is 55us at > 100Khz. Set the delay to 15us which should work for 400Khz. > 100Khz will loop four times and get a 60us delay. Previous > total delay was 100,000us new

[U-Boot] [PATCH V2] mpc5200: reduce delays in i2c

2009-03-30 Thread Jon Smirl

Make the i2c delays smaller. The measured delay is 55us at 100Khz. Set the delay to 15us which should work for 400Khz. 100Khz will loop four times and get a 60us delay. Previous total delay was 100,000us new total delay is 150,000us before timeout. Signed-off-by: Jon Smirl --- cpu/mpc5xxx/i2c.c