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board: ti: am335x: add support to fixup phy address

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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 <nsekhar@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Sekhar Nori 2018-08-23 17:11:30 +05:30 committed by Tom Rini
parent e2597be5bc
commit 20c37fb1bf
1 changed files with 78 additions and 0 deletions
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78
board/ti/am335x/board.c
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@ -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.
*/