[U-Boot] [PATCH u-boot-marvell v2.1 15/15] i2c: mvtwsi: fix reading status register after interrupt

[Marek Behun]

> This still looks a bit strange. Looking at the Linux driver, there
> is no delay after reading the control register. But its using
> interrupts and therefore an implicit delay is added before this
> interrupt service routine is called (instead of the busy loop here
> in the U-Boot driver).

Exactly my opinion as well.

> BTW: Whats the value of "tick" in twsi_wait() in your case?

requested I2C freq is 100000 Hz, actual 97656 Hz (nearest lower
possible). This calculates the tick to 10340 ns with calc_tick, and
u-boot sleeps for 11 ms (DIV_ROUND_UP).

When tick was 10 ms this bug did not occur, because of the different
timing when the control value was read it already was set for a while
by the controller, it seems.

Btw should I sent these first 14 patches with Reviewed-by tags?

Marek