i2c hangs board

[Lokesh Kumar]

I have mpc8xx based board, with 2.4.18 kernel. I have m41t81 RTC chip hooked
on i2c bus. I am using i2c drivers from the denx ppc dev tree, and 8xx algo.
I modified the m41t11 driver of denx for my m41t81 chip. When my m41t81
based module calls cpm_iic_write function of i2c-algo-8xx, it hangs the
board. It hangs somewhere here..




	if(count > 16){
		/* Chip bug, set enable here */

		local_irq_save(flags);
		i2c->i2c_i2cmr = 0x13;	/* Enable some interupts */
		i2c->i2c_i2cer = 0xff;
		i2c->i2c_i2mod |= 1;	/* Enable */
		i2c->i2c_i2com |= 0x80;	/* Begin transmission */

		/* Wait for IIC transfer */
		tmo = interruptible_sleep_on_timeout(&iic_wait,1*HZ);

		local_irq_restore(flags);

	} else {  /* busy wait for small transfers, its faster */
		i2c->i2c_i2cmr = 0x00;	/* Disable I2C interupts */
		i2c->i2c_i2cer = 0xff;


		i2c->i2c_i2mod |= 1;	/* Enable */

		/*CRAHSES SOMEWHERE HERE....*/
		i2c->i2c_i2com |= 0x80;	/* Begin transmission */
		tmo = jiffies + 1*HZ;

		while(!(i2c->i2c_i2cer & 0x12 || time_after(jiffies, tmo)));
/* Busy wait, with a timeout */
	}


Any help is appreciated.


Thanks
Lokesh Kumar
Wireless Matrix USA Inc.
703-262-4032


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