Patch "i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc_timings" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc_timings

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     i2c-rk3x-give-the-tuning-value-0-during-rk3x_i2c_v0_calc_timings.patch

and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: David Wu <[email protected]>
Date: Sat, 22 Oct 2016 16:43:42 +0800
Subject: i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc_timings

From: David Wu <[email protected]>

commit 399c168ab5ab5e12ed55b6c91d61c24eb84c9164 upstream.

We found a bug that i2c transfer sometimes failed on 3066a board with stabel-4.8, the con register would be updated by uninitialized tuning value, it made the i2c transfer failed.

So give the tuning value to be zero during rk3x_i2c_v0_calc_timings.

---
 drivers/i2c/busses/i2c-rk3x.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -600,6 +600,8 @@ static int rk3x_i2c_calc_divs(unsigned l
 	*div_low = *div_low - 1;
 	*div_high = *div_high - 1;
 
+	/* Give the tuning value 0, that would not update con register */
+	t_calc->tuning = 0;
 	/* Maximum divider supported by hw is 0xffff */
 	if (*div_low > 0xffff) {
 		*div_low = 0xffff;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/i2c-rk3x-give-the-tuning-value-0-during-rk3x_i2c_v0_calc_timings.patch