From ba3864f8037f58dd1f46cad3b76adc0a84bd33b3 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 20 Apr 2015 12:37:14 -0600 Subject: dm: i2c: Add functions to read and write a register Add driver model versions of the legacy functions to read and write a single byte register. These are a useful shortcut in many cases. Signed-off-by: Simon Glass Acked-by: Heiko Schocher --- include/i2c.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'include') diff --git a/include/i2c.h b/include/i2c.h index 6fd73fa..d794057 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -124,6 +124,27 @@ int dm_i2c_probe(struct udevice *bus, uint chip_addr, uint chip_flags, struct udevice **devp); /** + * dm_i2c_reg_read() - Read a value from an I2C register + * + * This reads a single value from the given address in an I2C chip + * + * @addr: Address to read from + * @return value read, or -ve on error + */ +int dm_i2c_reg_read(struct udevice *dev, uint offset); + +/** + * dm_i2c_reg_write() - Write a value to an I2C register + * + * This writes a single value to the given address in an I2C chip + * + * @addr: Address to write to + * @val: Value to write (normally a byte) + * @return 0 on success, -ve on error + */ +int dm_i2c_reg_write(struct udevice *dev, uint offset, unsigned int val); + +/** * dm_i2c_set_bus_speed() - set the speed of a bus * * @bus: Bus to adjust -- cgit v1.1