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author | Wayne Zou <b36644@freescale.com> | 2011-09-06 13:43:00 +0800 |
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committer | Wayne Zou <b36644@freescale.com> | 2011-09-06 14:20:30 +0800 |
commit | 3022105ecdeec0c6b10199bd1e1bc7e0ba9f0cee (patch) | |
tree | daeb2f6ddf442b72d2681d40ecf8bb28f7eace6c /drivers/pcmcia/pxa_pcmcia.c | |
parent | aac855885f336cb9a7ed570247901c0704570871 (diff) | |
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ENGR00156098 mx53_smd/mx53_loco: DA9053 I2C SDA stuck low issue on bootup
For DA9053 I2C SDA stuck low issue: the I2C block in DA9053 may not correctly
receive a Power On Reset and device is in unknown state during start-up.
The only way to get the chip into known state before any communication
with the Chip via I2C is to dummy clock the I2C and bring it in a state
where I2C can communicate. Dialog suggested to provide 9 clock on SCL.
Dialog don't know the exact reason for the fault and assume it is because
some random noise or spurious behaviour.
This has to been done in host platform specific I2C driver during
start-up when the I2C is being configured at platform level to supply with
dummy 9 clock on SCL. Dialog I2C driver has no control to provide dummy 9
clock on SCL.
Signed-off-by: Wayne Zou <b36644@freescale.com>
Diffstat (limited to 'drivers/pcmcia/pxa_pcmcia.c')
0 files changed, 0 insertions, 0 deletions