Thanks, That works. But shouldn't the i2c_read/write functions be made safe in
atomic context?
regards
-Nitin
----- Original Message ----
From: Caglar Akyuz <[EMAIL PROTECTED]>
To: Nitin Mahajan <[EMAIL PROTECTED]>
Cc: davinci-linux-open-source@linux.davincidsp.com
Sent: Tuesday, September 2, 2008 15:45:10
Subject: Re: davinci_i2c_read/write from atomic context
Nitin Mahajan wrote:
> HI!
>
> Apologise to write earlier in Rich Text Mode.
>
> Is it possible(right way) to use the davinci_i2c_read() and
> davinci_i2c_write() from atomic context like interrupt handler or tasklet?
>
> If not, whats the alternative to read data on i2c in atomic context?
>
I use a workqueue like:
static void tsc_workqueue_handler(struct work_struct *work)
{
tsc2004_ts_rx(); //includes some i2c transfers
}
DECLARE_WORK(tsc_wq, tsc_workqueue_handler);
static irqreturn_t tsc2004_ts_irq_handler(int irq, void *dev_id)
{
/*
* Schedule the workqueue for I2C transfers
*/
schedule_work(&tsc_wq);
/* kick pen up timer */
mod_timer(&penup_timer,
jiffies + msecs_to_jiffies(TSC2004_TS_PENUP_TIME));
return IRQ_HANDLED;
}
Regards,
Caglar
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