In the current DSA switch driver API, only the udevice of the switch (belonging to UCLASS_DSA) is exposed, as well as an "int port" argument. So drivers do not have access to the udevice of individual ports (belonging to UCLASS_ETH), one of the reasons being that not all ports have an associated UCLASS_ETH udevice.
However, all DSA ports have an OF node, and in some cases the driver needs a handle to it, for all ports including the CPU port. Example: the following Linux per-port device tree property:
managed = "in-band-status";
states whether a port should operate with clause 37 in-band autoneg enabled or not.
This patch exposes a function which can be called by individual drivers as needed.
Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Reviewed-by: Ramon Fried rfried.dev@gmail.com --- v1->v2: none
include/net/dsa.h | 12 ++++++++++++ net/dsa-uclass.c | 20 ++++++++++++++++++++ 2 files changed, 32 insertions(+)
diff --git a/include/net/dsa.h b/include/net/dsa.h index a339a4973033..1b1068cd88ce 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -6,6 +6,7 @@ #ifndef __DSA_H__ #define __DSA_H__
+#include <dm/ofnode.h> #include <phy.h> #include <net.h>
@@ -145,6 +146,17 @@ int dsa_set_tagging(struct udevice *dev, ushort headroom, ushort tailroom); */ struct udevice *dsa_get_master(struct udevice *dev);
+/** + * dsa_port_get_ofnode() - Return a reference to the given port's OF node + * + * Can be called at driver probe time or later. + * + * @dev: DSA switch udevice pointer + * @port: Port index + * @return OF node reference if OK, NULL on error + */ +ofnode dsa_port_get_ofnode(struct udevice *dev, int port); + /** * dsa_port_get_pdata() - Helper that returns the platdata of an active * (non-CPU) DSA port device. diff --git a/net/dsa-uclass.c b/net/dsa-uclass.c index 3b097f75b75c..85b60bd9ea0e 100644 --- a/net/dsa-uclass.c +++ b/net/dsa-uclass.c @@ -44,6 +44,26 @@ int dsa_set_tagging(struct udevice *dev, ushort headroom, ushort tailroom) return 0; }
+ofnode dsa_port_get_ofnode(struct udevice *dev, int port) +{ + struct dsa_pdata *pdata = dev_get_uclass_plat(dev); + struct dsa_port_pdata *port_pdata; + struct udevice *pdev; + + if (port == pdata->cpu_port) + return pdata->cpu_port_node; + + for (device_find_first_child(dev, &pdev); + pdev; + device_find_next_child(&pdev)) { + port_pdata = dev_get_parent_plat(pdev); + if (port_pdata->index == port) + return dev_ofnode(pdev); + } + + return ofnode_null(); +} + /* returns the DSA master Ethernet device */ struct udevice *dsa_get_master(struct udevice *dev) {