On Fri, Feb 26, 2010 at 06:22:34PM -0600, Olaya, Margarita wrote:
> Do you mean something like this?
> time_left = wait_for_completion_timeout(&priv->ready,
> msecs_to_jiffies(48));
> if(!time_left) {
> twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &intid,
> TWL6040_REG_INTID);
> if (!(intid & TWL6040_READYINT))
> goto error;
> }
>
> return 0;
>
> error:
> dev_err(codec->dev, "timeout waiting for READYINT\n");
> return -ETIMEDOUT;
Yes, or wrapped in a for loop with shorter timeouts on the individual
waits.
> but in this case will it not take unnecessarily 48ms when the
> interruption line is not valid?
You're always going to get some additional delay when polling unless you
busy wait for completion, which obviously has its own problems.
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