From 2aefa6e3f2ab621483ca645b16c7bf8cb9334fa3 Mon Sep 17 00:00:00 2001 From: Sebastian Reichel Date: Thu, 15 Jul 2021 17:39:59 +0200 Subject: 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 Signed-off-by: Sebastian Reichel Reviewed-by: Simon Glass --- include/i2c.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include') diff --git a/include/i2c.h b/include/i2c.h index 8db34a67fee..3d9ecaba0b6 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -242,6 +242,20 @@ 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 * -- cgit v1.2.3