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There is a problem that fails to initialize the LCD timing controller external.

Question asked by Takashi Takahashi on Nov 13, 2013
Latest reply on Mar 3, 2014 by Yixing Kong

There is a problem that fails to initialize the LCD timing controller external.

 

Communication speed is 400kHz.

weight stabilization time is specified as follows in i2c_imx_start of i2c-imx.c.

Phenomenon initialization to succeed if change to 2ms about this 50us has occurred.

/ * Wait controller to be stable * /

  udelay (50);

 

Question

The meaning of this weight time,

, the impact of changing (like needing increased weight more in the case of 400kHz) and whether or not depends on the communication speed.

 

  / * Wait controller to be stable * /

  udelay (50);

 

The location of the source code

\ linux-3.0.35 \ drivers \ i2c \ busses \ i2c-imx.c

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