diff options
author | Bin Meng <bmeng.cn@gmail.com> | 2021-03-14 15:14:46 +0300 |
---|---|---|
committer | Priyanka Jain <priyanka.jain@nxp.com> | 2021-04-15 11:52:17 +0300 |
commit | 173c66bf9c0cfefd0ff69f0939c95900340d0988 (patch) | |
tree | 68c250b142404cca1dfa1b582243fe5160e1b919 /drivers/core/of_extra.c | |
parent | 1c196b308aeb226ae1849d49082d43a5f7617b35 (diff) | |
download | u-boot-173c66bf9c0cfefd0ff69f0939c95900340d0988.tar.xz |
of: extra: Introduce ofnode_phy_is_fixed_link() API
Introduce a helper API ofnode_phy_is_fixed_link() to detect whether
the ethernet controller connects to a fixed-link pseudo-PHY device.
Note there are two ways to describe a fixed PHY attached to an
Ethernet device:
- the new DT binding, where 'fixed-link' is a sub-node of the
Ethernet device
- the old DT binding, where 'fixed-link' is a property with 5
cells encoding various information about the fixed PHY
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
Diffstat (limited to 'drivers/core/of_extra.c')
-rw-r--r-- | drivers/core/of_extra.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/core/of_extra.c b/drivers/core/of_extra.c index 653344529e..7702beff97 100644 --- a/drivers/core/of_extra.c +++ b/drivers/core/of_extra.c @@ -130,3 +130,26 @@ int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, return 0; } + +bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node) +{ + ofnode node, subnode; + int len; + + subnode = ofnode_find_subnode(eth_node, "fixed-link"); + if (ofnode_valid(subnode)) { + /* new binding */ + node = subnode; + } else if (ofnode_get_property(eth_node, "fixed-link", &len) && + len == (5 * sizeof(__be32))) { + /* old binding */ + node = eth_node; + } else { + return false; + } + + if (phy_node) + *phy_node = node; + + return true; +} |