Re: [U-Boot] [PATCH 1/3] i2c: tegra: use repeated start for reads

On 06/25/2014 10:57 AM, Stephen Warren wrote:

From: Stephen Warren swarren@nvidia.com

I2C read transactions are typically implemented as follows:

START(write) address REPEATED_START(read) data... STOP

However, Tegra's I2C driver currently implements reads as follows:

START(write) address STOP START(read) data... STOP

This sequence confuses at least the AS3722 PMIC on the Jetson TK1 board, leading to corrupted read data in some cases. Fix the driver to chain the transactions together using repeated starts to solve this.

Heiko, do these patches look good?