The most of ethernet drivers are using this mdio registration sequence. strcpy(priv->bus->name, "emac"); mdio_register(priv->bus); Where driver can be used only with one MDIO bus because only unique name should be used.
Other drivers are using unique device name for MDIO registration to support multiple instances. snprintf(priv->bus->name, sizeof(bus->name), "%s", name);
With DM dev->seq is used more even in logs (like random MAC address generation: printf("\nWarning: %s (eth%d) using random MAC address - %pM\n", dev->name, dev->seq, pdata->enetaddr); ) where eth%d prefix is used.
Simplify driver code to register mdio device with dev->seq number to simplify mdio registration and reduce code duplication across all drivers. With DM_SEQ_ALIAS enabled dev->seq reflects alias setting.
Signed-off-by: Michal Simek michal.simek@xilinx.com Acked-by: Joe Hershberger joe.hershberger@ni.com Reviewed-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Add kernel-doc format for mdio_register_seq (Reported-by: Simon)
For example:
Board: Xilinx Zynq Net: ZYNQ GEM: e000b000, phyaddr 7, interface rgmii-id
Warning: ethernet@e000b000 (eth0) using random MAC address - 7a:fc:90:53:6a:41 eth0: ethernet@e000b000ZYNQ GEM: e000c000, phyaddr ffffffff, interface rgmii-id
Warning: ethernet@e000c000 (eth3) using random MAC address - 1a:ff:d7:1a:a1:b2 , eth3: ethernet@e000c000 ** Bad device size - mmc 0 ** Checking if uenvcmd is set ... Hit any key to stop autoboot: 0 Zynq> mdio list eth0: 17 - Marvell 88E1111S <--> ethernet@e000b000 eth3: 17 - Marvell 88E1111S <--> ethernet@e000c000 Zynq>
--- common/miiphyutil.c | 12 ++++++++++++ include/miiphy.h | 9 +++++++++ 2 files changed, 21 insertions(+)
diff --git a/common/miiphyutil.c b/common/miiphyutil.c index aca18db52a00..8eb0f761bb01 100644 --- a/common/miiphyutil.c +++ b/common/miiphyutil.c @@ -107,6 +107,18 @@ int mdio_register(struct mii_dev *bus) return 0; }
+int mdio_register_seq(struct mii_dev *bus, int seq) +{ + int ret; + + /* Setup a unique name for each mdio bus */ + ret = snprintf(bus->name, MDIO_NAME_LEN, "eth%d", seq); + if (ret < 0) + return ret; + + return mdio_register(bus); +} + int mdio_unregister(struct mii_dev *bus) { if (!bus) diff --git a/include/miiphy.h b/include/miiphy.h index 83141b4a6ae1..fe8928a3a9d0 100644 --- a/include/miiphy.h +++ b/include/miiphy.h @@ -48,6 +48,15 @@ void miiphy_listdev(void); struct mii_dev *mdio_alloc(void); void mdio_free(struct mii_dev *bus); int mdio_register(struct mii_dev *bus); + +/** + * mdio_register_seq - Register mdio bus with sequence number + * @bus: mii device structure + * @seq: sequence number + * + * Return: 0 if success, negative value if error + */ +int mdio_register_seq(struct mii_dev *bus, int seq); int mdio_unregister(struct mii_dev *bus); void mdio_list_devices(void);