From d33ebd13741b7473e93a1a6780edbb1e2dca8258 Mon Sep 17 00:00:00 2001 From: Yidi Lin Date: Tue, 15 Mar 2016 14:38:44 +0800 Subject: device: Add i2c read/write register field API i2c_read_field() - read the value from the specific register field i2c_write_field() - write the value to the specific register field BRANCH=none BUG=none TEST=none Change-Id: I2098715b4583c1936c93b3ff45ec330910964304 Signed-off-by: Patrick Georgi Original-Commit-Id: 0817fc76d07491b39c066f1393a6435f0831b50c Original-Change-Id: I92c187a89d10cfcecf3dfd9291e0bc015459c393 Original-Signed-off-by: Yidi Lin Original-Reviewed-on: https://chromium-review.googlesource.com/332712 Original-Reviewed-by: Julius Werner Reviewed-on: https://review.coreboot.org/14105 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer Reviewed-by: Martin Roth --- src/include/device/i2c.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/include/device/i2c.h') diff --git a/src/include/device/i2c.h b/src/include/device/i2c.h index 8e59ba7c21..b152bb98c2 100644 --- a/src/include/device/i2c.h +++ b/src/include/device/i2c.h @@ -45,6 +45,11 @@ void software_i2c_wedge_ack(unsigned bus, u8 chip); void software_i2c_wedge_read(unsigned bus, u8 chip, u8 reg, int bit_count); void software_i2c_wedge_write(unsigned bus, u8 chip, u8 reg, int bit_count); +int i2c_read_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t *data, + uint8_t mask, uint8_t shift); +int i2c_write_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t data, + uint8_t mask, uint8_t shift); + /* * software_i2c is supposed to be a debug feature. It's usually not compiled in, * but when it is it can be dynamically enabled at runtime for certain busses. -- cgit v1.2.3