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* lspcon_i2c_spi: Extract I2C bus parameter handlingAngel Pons2021-05-091-0/+9
| | | | | | | | | | | | Introduce the `i2c_open_from_programmer_params` function to avoid having to duplicate parameter parsing code on all I2C programmers. This also allows having the same programmer parameters on all I2C programmers. Change-Id: I006b311c88feea37fe4b217f769b21ca1505def9 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/52830 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
* lspcon_i2c_spi: support a devpath optionPeter Marheine2021-05-021-0/+8
| | | | | | | | | | | | | | | | | | | | | | 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>
* i2c_helper: Add support for the Linux I2C subsystemShiyu Sun2020-04-011-0/+112
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>