Some callers may find it easier to provide the path to an I2C device
at which to communicate with the device, rather than specify the bus
number- doing so might involve trying to parse a path to extract the
number only for flashrom to do the reverse, which is error-prone and
unnecessary.
This change adds support for a `devpath` option, continuing to
allow `bus` and requiring only one of them be specified.
TEST=Verified --flash-size outputs correct values with both
devpath=/dev/i2c-7 and bus=7, as well as noting that one is
required if neither is specified and only one may be specified
if both are given.
Signed-off-by: Peter Marheine <pmarheine@chromium.org>
Change-Id: Id2adf8a307b9205ce5e5804a6c3e22f19d0c34c9
Reviewed-on: https://review.coreboot.org/c/flashrom/+/51967
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
See https://www.kernel.org/doc/Documentation/i2c/ for details.
This creates common interface for I2C access functions, and adds
implementation for linux I2C functions.
BUG=b:148746232
BRANCH=none
TEST=build success
Signed-off-by: Shiyu Sun <sshiyu@chromium.org>
Change-Id: Ie0487824dfb71970bede17f617dbbb30ddf78c12
Reviewed-on: https://review.coreboot.org/c/flashrom/+/39686
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
