On 3 August 2015 at 08:19, Simon Glass sjg@chromium.org wrote:
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:
- 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.
- 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
Changes in v2: None
drivers/i2c/Kconfig | 13 ++++++++ drivers/i2c/Makefile | 1 + drivers/i2c/cros_ec_ldo.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/misc/cros_ec.c | 21 +++++++------ include/cros_ec.h | 4 +-- 5 files changed, 104 insertions(+), 12 deletions(-) create mode 100644 drivers/i2c/cros_ec_ldo.c
Applied to u-boot-dm.