Re: [U-Boot] [PATCH 02/20] dm: i2c: sandbox: Add debugging to the speed limit

Hello Simon,

Am 20.04.2015 20:37, schrieb Simon Glass:

Print a debug() message with the I2C speed is exceeded.

Signed-off-by: Simon Glass sjg@chromium.org

drivers/i2c/sandbox_i2c.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/sandbox_i2c.c b/drivers/i2c/sandbox_i2c.c index d6adc0f..621caec 100644 --- a/drivers/i2c/sandbox_i2c.c +++ b/drivers/i2c/sandbox_i2c.c @@ -73,8 +73,10 @@ static int sandbox_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, * 400KHz for reads */ is_read = nmsgs > 1;

• if (i2c->speed_hz > (is_read ? 400000 : 100000))

• if (i2c->speed_hz > (is_read ? 400000 : 100000)) {

• debug("%s: Max speed exceeded\n", __func__);
  

  return -EINVAL;
• }

Why different speeds for reading/writing?

bye, Heiko

return ops->xfer(emul, msg, nmsgs); }