[U-Boot] [PATCH V2 4/4] lpi2c: Add bus busy error handling

[Heiko Schocher]

Hello Peng,

Am 08.07.2018 um 05:46 schrieb Peng Fan:
> From: Ye Li <ye.li at nxp.com>
> 
> When doing "i2c dev 4; i2c probe" with ENET daughter card connected
> on iMX8QXP MEK board, we met a i2c bus busy issue, that the BBF of
> lpi2c always show busy, but the master is idle, and stop is detected
> (SDF set).
> 
> This patch addes a handling to re-init the lpi2c master for this
> case. Then the issue can be worked around.
> 
> Signed-off-by: Ye Li <ye.li at nxp.com>
> Acked-by: Peng Fan <peng.fan at nxp.com>
> Reviewed-by: Heiko Schocher <hs at denx.de>
> ---
> 
> V2: Add review tag.
> Heiko, I have no idea why the busy show, from the bus, we measured it
> is idle, but the controller bit shows busy. We followed Linux kernel's
> method to reinit the bus and all works.
> 
>   drivers/i2c/imx_lpi2c.c | 53 +++++++++++++++++++++++++++++--------------------
>   1 file changed, 32 insertions(+), 21 deletions(-)

Applied to u-boot-i2c.git master

Thanks!

bye,
Heiko
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