summaryrefslogtreecommitdiffstats
path: root/drivers/i2c
diff options
context:
space:
mode:
authorSimon Glass <sjg@chromium.org>2015-07-02 18:15:42 -0600
committerSimon Glass <sjg@chromium.org>2015-08-05 20:57:51 -0600
commitdf358c6beca8f7cc2f2b67c54f0bf255ebd5cc22 (patch)
tree702662e59c25602e3c8820742ce85c9506d410ba /drivers/i2c
parent7fc65bcf8a0a5463db86efbb273a40448c845efc (diff)
downloadu-boot-df358c6beca8f7cc2f2b67c54f0bf255ebd5cc22.tar.gz
u-boot-df358c6beca8f7cc2f2b67c54f0bf255ebd5cc22.tar.xz
u-boot-df358c6beca8f7cc2f2b67c54f0bf255ebd5cc22.zip
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/i2c-uclass.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 42d6e89e9d..50b99ead3d 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -202,6 +202,17 @@ int dm_i2c_write(struct udevice *dev, uint offset, const uint8_t *buffer,
}
}
+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;