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

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

You can have 100khz and 400khz capable devices accessible to the master. You can run everything at 100khz but you will not be taking full advantange of 400khz devices.

Philips AN10216-01 (I2C Manual) Dated March 24, 2003, Page 24 describes how a system can run both 100kHz devices and 400kHz devices on the same bus and access 400kHz devices at 400kHz using I2C bus repeater such as PCA9515.

I understand this might not be useful for everyone so that is why I proposed to make it an optional command that is compiled in only if CONFIG_I2C_ISPEED is defined.

Best regards, Tolunay