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authorSimon Glass <sjg@chromium.org>2015-08-03 08:19:23 -0600
committerSimon Glass <sjg@chromium.org>2015-08-05 21:06:11 -0600
commitcc456bd7df06225819258dec9d4a5047e8da4952 (patch)
tree12deef288f1c1bd0bf1af017b89e19608bc0c075 /include
parenta0942a6d3e08490be2871396c977fb5520ecdf33 (diff)
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dm: cros_ec: Convert the I2C tunnel code to use driver model
The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This currently uses a copy of the I2C command code and a special 'crosec' sub-command. With driver model we can define an I2C bus which tunnels through to the EC, and use the normal 'i2c' command to access it. This simplifies the code and removes some duplication. Add an I2C driver which tunnels through to the EC. Adjust the EC code to support binding child devices so that it can be set up. Adjust the existing I2C xfer function to fit driver model better. For now the old code remains to allow things to still work. It will be removed in a later patch once the new flow is fully enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
-rw-r--r--include/cros_ec.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/cros_ec.h b/include/cros_ec.h
index 3b2be2c..41951c3 100644
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -390,6 +390,16 @@ int cros_ec_decode_ec_flash(const void *blob, int node,
*/
void cros_ec_check_keyboard(struct cros_ec_dev *dev);
+struct i2c_msg;
+/*
+ * Tunnel an I2C transfer to the EC
+ *
+ * @param dev CROS-EC device
+ * @param msg List of messages to transfer
+ * @param nmsgs Number of messages to transfer
+ */
+int cros_ec_i2c_tunnel(struct udevice *dev, struct i2c_msg *msg, int nmsgs);
+
/*
* Tunnel an I2C transfer to the EC
*
@@ -401,7 +411,7 @@ void cros_ec_check_keyboard(struct cros_ec_dev *dev);
* @param len Length of buffer
* @param is_read 1 if this is a read, 0 if this is a write
*/
-int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
- int alen, uchar *buffer, int len, int is_read);
+int cros_ec_i2c_xfer_old(struct cros_ec_dev *dev, uchar chip, uint addr,
+ int alen, uchar *buffer, int len, int is_read);
#endif