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| author | Stephen Warren <swarren@nvidia.com> | 2014-06-25 10:57:27 -0600 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2014-07-03 06:29:19 +0200 |
| commit | 68049a082b8aedf09e769e61885e000e598bb516 (patch) | |
| tree | 26780e2fead018bee3b9e1d9a9f25f41e47d401a /drivers/i2c/pca9564_i2c.c | |
| parent | fe8b3212b7938861eacdefe6115810303a96f9cc (diff) | |
| download | u-boot-imx-68049a082b8aedf09e769e61885e000e598bb516.zip u-boot-imx-68049a082b8aedf09e769e61885e000e598bb516.tar.gz u-boot-imx-68049a082b8aedf09e769e61885e000e598bb516.tar.bz2 | |
i2c: tegra: use repeated start for reads
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.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Yen Lin <yelin@nvidia.com>
Diffstat (limited to 'drivers/i2c/pca9564_i2c.c')
0 files changed, 0 insertions, 0 deletions