diff options
| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2021-07-15 17:39:59 +0200 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2021-08-22 10:52:53 +0200 |
| commit | 2aefa6e3f2ab621483ca645b16c7bf8cb9334fa3 (patch) | |
| tree | ce32ac1a9ee05266489dd58f9ff0ade8852e51cb /include/i2c.h | |
| parent | 79d389a54891a67269bfa366f044a2079409e499 (diff) | |
i2c: add dm_i2c_reg_clrset
Add function to apply a bitmask to an i2c register, so
that specific bits can be cleared and/or set.
Suggested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/i2c.h')
| -rw-r--r-- | include/i2c.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 8db34a67fe..3d9ecaba0b 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -243,6 +243,20 @@ int dm_i2c_reg_read(struct udevice *dev, uint offset); int dm_i2c_reg_write(struct udevice *dev, uint offset, unsigned int val); /** + * dm_i2c_reg_clrset() - Apply bitmask to an I2C register + * + * Read value, apply bitmask and write modified value back to the + * given address in an I2C chip + * + * @dev: Device to use for transfer + * @offset: Address for the R/W operation + * @clr: Bitmask of bits that should be cleared + * @set: Bitmask of bits that should be set + * @return 0 on success, -ve on error + */ +int dm_i2c_reg_clrset(struct udevice *dev, uint offset, u32 clr, u32 set); + +/** * dm_i2c_xfer() - Transfer messages over I2C * * This transfers a raw message. It is best to use dm_i2c_reg_read/write() |