[U-Boot-Users] Proposal to add "ispeed" (I2C speed) command

Wolfgang Denk wd at denx.de
Thu Mar 4 10:11:39 CET 2004


In message <11176.216.110.51.8.1078335375.squirrel at www.orkun.us> you wrote:
> We have some instrumentation hanging on I2C bus. I would like to introduce
> a new u-boot command ispeed to set the i2c speed so fast devices would not
> be constrained to the lowest denominator speed.

I don't understand why such a command might be needed.

Just configure the I2C clock for the maximum  allowable  speed  right
from the beginning.

> I would also set an environment variable in ispeed command indicating
> current i2c speed ("i2cspeed") so it could be used in scripts.

What is that good for? Why would you need to change speed?

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
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