pau: link training

Add elementary functions to handle a phb complete, fundamental and
hot resets.
For the time being, specific creset and hreset are not supported.

A complete fundamental reset is based on the following steps, in this
order:
- Place all bricks into Fence state
- Disable BARs
- Reset ODL to Power-on Values
- Set the i2c reset pin in output mode
- Initialize PHY Lanes
- Deassert ODL reset
- Clear the the i2c reset pin
- Unfence bricks
- Enable BARs
- Enable ODL training mode

Link training is also set up.

Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/pau.h b/include/pau.h
index 9fbccb8..c0a0940 100644
--- a/include/pau.h
+++ b/include/pau.h
@@ -40,6 +40,8 @@ struct pau_dev {
 	struct dt_node		*dn;
 	struct phb		phb;
 	uint32_t		status;
+	unsigned long		train_start;
+	unsigned long		train_timeout;
 
 	struct pau_bar		ntl_bar;
 	struct pau_bar		genid_bar;