From 0969e43b3fae48c90aaf1df284560f6b76f84efd Mon Sep 17 00:00:00 2001 From: Peter Marheine Date: Wed, 31 Mar 2021 11:28:11 +1100 Subject: lspcon_i2c_spi: support a devpath option 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 Change-Id: Id2adf8a307b9205ce5e5804a6c3e22f19d0c34c9 Reviewed-on: https://review.coreboot.org/c/flashrom/+/51967 Reviewed-by: Edward O'Callaghan Tested-by: build bot (Jenkins) --- i2c_helper.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'i2c_helper.h') diff --git a/i2c_helper.h b/i2c_helper.h index 599e08bb..cab2ce6f 100644 --- a/i2c_helper.h +++ b/i2c_helper.h @@ -71,6 +71,14 @@ static inline int i2c_buffer_t_fill(i2c_buffer_t *i2c_buf, void *buf, uint16_t l */ int i2c_open(int bus, uint16_t addr, int force); +/** + * i2c_open_path: open an I2C device by device path + * + * This function behaves the same as i2c_open, but takes a filesystem + * path (assumed to be an I2C device file) instead of a bus number. + */ +int i2c_open_path(const char *path, uint16_t addr, int force); + /** * i2c_close - closes the file descriptor returned by i2c_open * -- cgit v1.2.3