net: ti: icssg-prueth: Add support for half duplex operation

Browse source

This patch adds support for half duplex operation at 10M and 100M link
speeds for AM654x/AM64x devices.
- Driver configures rand_seed, a random number, in DMEM HD_RAND_SEED_OFFSET
field, which will be used by firmware for Back off time calculation.
- Driver informs FW about half duplex link operation in DMEM
PORT_LINK_SPEED_OFFSET field by setting bit 7 for 10/100M HD.

Hence, the half duplex operation depends on board design the
"ti,half-duplex-capable" property has to be enabled for ICSS-G ports if HW
is capable to perform half duplex.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

MD Danish Anwar 2023-09-13 14:40:11 +05:30 • committed by David S. Miller

parent 927c568d62

commit 0a205f0fe8

3 changed files with 31 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

14

drivers/net/ethernet/ti/icssg/icssg_config.c

View file

17

drivers/net/ethernet/ti/icssg/icssg_prueth.c

View file

2

drivers/net/ethernet/ti/icssg/icssg_prueth.h

View file