dm: i2c: Add a function to transfer messages
Sometimes it is useful to be able to transfer a raw I2C message. This
happens when the chip address needs to be set manually, or when the data to
be sent/received is in another buffer.
Add a function to provide access to this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 42d6e89..50b99ea 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -202,6 +202,17 @@
}
}
+int dm_i2c_xfer(struct udevice *dev, struct i2c_msg *msg, int nmsgs)
+{
+ struct udevice *bus = dev_get_parent(dev);
+ struct dm_i2c_ops *ops = i2c_get_ops(bus);
+
+ if (!ops->xfer)
+ return -ENOSYS;
+
+ return ops->xfer(bus, msg, nmsgs);
+}
+
int dm_i2c_reg_read(struct udevice *dev, uint offset)
{
uint8_t val;