u-boot.git/drivers/misc, branch v2014.04-rc3

cros_ec: Implement I2C pass-through

2014-03-18T02:05:48+00:00

The Chrome EC has a feature where you can access its I2C buses through a
pass-through arrangement. Add a command to support this, and export the
function for it also.

Reviewed-by: Vadim Bendebury 
Signed-off-by: Simon Glass

cros_ec: sandbox: Add Chrome OS EC emulation

2014-03-18T02:05:47+00:00

Add a simple emulation of the Chrome OS EC for sandbox, so that it can
perform various EC tasks such as keyboard handling.

Reviewed-by: Vadim Bendebury 
Signed-off-by: Simon Glass

cros_ec: Correct comparison between signed and unsigned numbers

2014-03-18T02:05:47+00:00

Due to signed/unsigned comparison, '< sizeof(struct)' does not do the right
thing, since if ec_command() returns a -ve number we will consider this be
success.

Adjust all comparisons to avoid this problem.

This error was found with sandbox, which gives a segfault in this case. On
ARM we may instead silently fail.

We should also consider turning on -Wsign-compare to catch this sort of thing
in future.

Reviewed-by: Andrew Chew 
Reviewed-by: Simon Glass 
Reviewed-by: Vadim Bendebury 
Tested-by: Andrew Chew 
Signed-off-by: Simon Glass 
Signed-off-by: Jimmy Zhang

cros_ec: spi: Add support for EC protocol version 3

2014-03-18T02:05:47+00:00

Protocol version 3 will be attempted first; if the EC doesn't support
it, u-boot will fall back to the old protocol version (2).

Reviewed-by: Simon Glass 
Signed-off-by: Randall Spangler 
Signed-off-by: Simon Glass

cros_ec: Add base support for protocol v3

2014-03-18T02:05:47+00:00

Protocol v2 was shipped with snow, link and spring. Protocol v3 is for
pit and is targetted at SPI operation.

Signed-off-by: Simon Glass

cros_ec: Clean up multiple EC protocol support

2014-03-18T02:05:47+00:00

Version 1 protocols (without command version) were already no longer
supported in cros_ec.c.  This removes some dead code from the
cros_ec_i2c driver.

Version 2 protcols (with command version) are now called
protocol_version=2, instead of cmd_version_is_supported=1.

A subsequent change will introduce protocol version 3 for SPI.

Reviewed-by: Simon Glass 
Signed-off-by: Randall Spangler 
Signed-off-by: Simon Glass

cros_ec: Sync up with latest Chrome OS EC version

2014-03-18T02:05:47+00:00

The EC messages have been expanded and some parts have been renamed.

Signed-off-by: Simon Glass

cros_ec: Move #ifdef to permit flash region access

2014-03-18T02:05:46+00:00

Flash region access is not tied to having commands, so adjust the #ifdef
to reflect this.

Signed-off-by: Simon Glass

cros_ec: Drop old EC version support from EC driver

2014-03-18T02:05:46+00:00

There is no need to support old style EC moving forward. Ultimately we
should get rid of the check_version() API. For now just return error
in case the EC does not seem to support the new API.

Reviewed-by: Vadim Bendebury 
Tested-by: Vadim Bendebury 
Signed-off-by: Vadim Bendebury 
Signed-off-by: Simon Glass

cros_ec: Add a function for decoding the Chrome OS EC flashmap

2014-03-18T02:05:46+00:00

In order to talk to the EC properly we need to be able to understand the
layout of its internal flash memory. This permits emulation of the EC
for sandbox, and also software update in a system with a real EC.

Signed-off-by: Simon Glass