[U-Boot] [PATCH v2 06/19] cros_ec: Support the LDO access method used by spring

[Simon Glass]

On 3 August 2015 at 08:19, Simon Glass <sjg at 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:
>
> 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 at 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.