lkml.org 
[lkml]   [2012]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRE: [PATCH v2] i2c: tegra: Add delay before reset the controller
> On Mon, Dec 26, 2011 at 04:44:41PM +0530, Alok Chauhan wrote:
>>
> + /*
> + * In NACK error condition resetting of I2C controller happens
> + * before STOP condition is properly completed by I2C controller,
> + * so wait for 2 clock cycle to complete STOP condition.
> + */
> + if (i2c_dev->msg_err == I2C_ERR_NO_ACK)
> + udelay(DIV_ROUND_UP(2 * 1000000, i2c_dev->bus_clk_rate));
> +

>Is a delay here good, would it be better to sleep so that some other process can gain cpu time?
>>We mostly used 100 khz i2c clock frequency and delay in that case will be 20 usec. Would it be ok to sleep for such a smaller time? Won't it increase any other overhead?

Please let me know if sleep is better option here instead of waiting.

Thanks
Alok

--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html


\
 
 \ /
  Last update: 2012-02-10 10:23    [W:0.037 / U:1.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site