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| author | Simon Glass <sjg@chromium.org> | 2015-08-03 08:19:24 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-05 21:06:11 -0600 |
| commit | f48eaf01b2f7212987166aae970b895c7e215466 (patch) | |
| tree | bd88667c12601647c556c16d91cfd52b0c576850 /post | |
| parent | cc456bd7df06225819258dec9d4a5047e8da4952 (diff) | |
| download | blackbird-obmc-uboot-f48eaf01b2f7212987166aae970b895c7e215466.tar.gz blackbird-obmc-uboot-f48eaf01b2f7212987166aae970b895c7e215466.zip | |
cros_ec: Support the LDO access method used by spring
Add a driver to support the special LDO access used by spring. This is a
custom method in the cros_ec protocol - it does not use an I2C
pass-through.
There are two implementation choices:
1. Write a special LDO driver which can talk across the EC. Duplicate all
the logic from TPS65090 for retrying when the LDO fails to come up.
2. Write a special I2C bus driver which pretends to be a TPS65090 and
transfers reads and writes using the LDO message.
Either is distasteful. The latter method is chosen since it results in less
code duplication and a fairly simple (30-line) implementation of the core
logic.
The crosec 'ldo' subcommand could be removed (since i2c md/mw will work
instead) but is retained as a convenience.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'post')
0 files changed, 0 insertions, 0 deletions
