On beaglebone black, it can so happen that PHY address is not latched correctly on reset and board boots with PHY responding to a different address than that programmed in device-tree. For example, see this report:
https://groups.google.com/d/msg/beagleboard/9mctrG26Mc8/1FuI_i5KW10J Workaround this by fixing up device-tree passed to kernel by using the PHY address detected in hardware. Beaglebone itself uses only one ethernet port and its DT currently uses phy_id (obsoleted). But the function has been written to handle multiple ports and phy_id as well as phy-handle to make the function more generically useful. Signed-off-by: Sekhar Nori <nsek...@ti.com> --- board/ti/am335x/board.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c index a359d20021fd..13845251afb5 100644 --- a/board/ti/am335x/board.c +++ b/board/ti/am335x/board.c @@ -608,6 +608,84 @@ static struct clk_synth cdce913_data = { }; #endif +#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_CONTROL) && \ + defined(CONFIG_DM_ETH) && defined(CONFIG_DRIVER_TI_CPSW) + +#define MAX_CPSW_SLAVES 2 + +/* At the moment, we do not want to stop booting for any failures here */ +int ft_board_setup(void *fdt, bd_t *bd) +{ + const char *slave_path, *enet_name; + int enetnode, slavenode, phynode; + struct udevice *ethdev; + char alias[16]; + u32 phy_id[2]; + int phy_addr; + int i, ret; + + /* phy address fixup needed only on beagle bone family */ + if (!board_is_beaglebonex()) + goto done; + + for (i = 0; i < MAX_CPSW_SLAVES; i++) { + sprintf(alias, "ethernet%d", i); + + slave_path = fdt_get_alias(fdt, alias); + if (!slave_path) + continue; + + slavenode = fdt_path_offset(fdt, slave_path); + if (slavenode < 0) + continue; + + enetnode = fdt_parent_offset(fdt, slavenode); + enet_name = fdt_get_name(fdt, enetnode, NULL); + + ethdev = eth_get_dev_by_name(enet_name); + if (!ethdev) + continue; + + phy_addr = cpsw_get_slave_phy_addr(ethdev, i); + + /* check for phy_id as well as phy-handle properties */ + ret = fdtdec_get_int_array_count(fdt, slavenode, "phy_id", + phy_id, 2); + if (ret == 2) { + if (phy_id[1] != phy_addr) { + printf("fixing up phy_id for %s, old: %d, new: %d\n", + alias, phy_id[1], phy_addr); + + phy_id[0] = cpu_to_fdt32(phy_id[0]); + phy_id[1] = cpu_to_fdt32(phy_addr); + do_fixup_by_path(fdt, slave_path, "phy_id", + phy_id, sizeof(phy_id), 0); + } + } else { + phynode = fdtdec_lookup_phandle(fdt, slavenode, + "phy-handle"); + if (phynode < 0) + continue; + + ret = fdtdec_get_int(fdt, phynode, "reg", -ENOENT); + if (ret < 0) + continue; + + if (ret != phy_addr) { + printf("fixing up phy-handle for %s, old: %d, new: %d\n", + alias, ret, phy_addr); + + fdt_setprop_u32(fdt, phynode, "reg", + cpu_to_fdt32(phy_addr)); + } + } + } + +done: + return 0; +} +#endif + /* * Basic board specific setup. Pinmux has been handled already. */ -- 2.16.2 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
