Hello Simon,
Am 20.04.2015 20:37, schrieb Simon Glass:
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
drivers/i2c/i2c-uclass.c | 19 +++++++++++++++++++ include/i2c.h | 21 +++++++++++++++++++++ 2 files changed, 40 insertions(+)
Acked-by: Heiko Schocher hs@denx.de
bye, Heiko
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c index f2e95c0..b8eb2d6 100644 --- a/drivers/i2c/i2c-uclass.c +++ b/drivers/i2c/i2c-uclass.c @@ -186,6 +186,25 @@ int dm_i2c_write(struct udevice *dev, uint offset, const uint8_t *buffer, } }
+int dm_i2c_reg_read(struct udevice *dev, uint offset) +{
- uint8_t val;
- int ret;
- ret = dm_i2c_read(dev, offset, &val, 1);
- if (ret < 0)
return ret;- return val;
+}
+int dm_i2c_reg_write(struct udevice *dev, uint offset, uint value) +{
- uint8_t val = value;
- return dm_i2c_write(dev, offset, &val, 1);
+}
- /**
- i2c_probe_chip() - probe for a chip on a bus
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