diff options
author | Simon Glass <sjg@chromium.org> | 2015-04-20 18:37:14 (GMT) |
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committer | Simon Glass <sjg@chromium.org> | 2015-05-06 02:58:19 (GMT) |
commit | ba3864f8037f58dd1f46cad3b76adc0a84bd33b3 (patch) | |
tree | c635c755acd3922067cba3c1ca98a100ec5059fe /include | |
parent | 1bde67b1f492cbb0177241a56af59f706d45fccf (diff) | |
download | u-boot-ba3864f8037f58dd1f46cad3b76adc0a84bd33b3.tar.xz |
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 <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'include')
-rw-r--r-- | include/i2c.h | 21 |
1 files changed, 21 insertions, 0 deletions
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 |