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authorShaohui Xie <Shaohui.Xie@freescale.com>2014-08-13 18:38:09 +0800
committerYork Sun <yorksun@freescale.com>2014-11-14 11:12:13 -0800
commitae6b45830637f7540d0c06280c886bfcb295d27b (patch)
tree1ce1dbe06b3f130ae6b2c56edb327874d3a1d40b /drivers
parentff5fb2a36dff8a92d6483359167a6b1525359eaf (diff)
downloadtalos-obmc-uboot-ae6b45830637f7540d0c06280c886bfcb295d27b.tar.gz
talos-obmc-uboot-ae6b45830637f7540d0c06280c886bfcb295d27b.zip
driver/net/fm/memac_phy: set NEG bit for external MDIOs
NEG bit default is '1' for external MDIOs as per FMAN-v3 RM, but on some platforms, e.g. T2080QDS, this bit is '0', which leads to MDIO failure on XAUI PHY, so set this bit definitely to align with the RM. Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/fm/memac_phy.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/fm/memac_phy.c b/drivers/net/fm/memac_phy.c
index e432ae7758..a155d8930b 100644
--- a/drivers/net/fm/memac_phy.c
+++ b/drivers/net/fm/memac_phy.c
@@ -139,9 +139,12 @@ int fm_memac_mdio_init(bd_t *bis, struct memac_mdio_info *info)
* is zero, so MDIO clock is disabled.
* So, for proper functioning of MDIO, MDIO_CLK_DIV bits needs to
* be properly initialized.
+ * NEG bit default should be '1' as per FMAN-v3 RM, but on platform
+ * like T2080QDS, this bit default is '0', which leads to MDIO failure
+ * on XAUI PHY, so set this bit definitely.
*/
setbits_be32(&((struct memac_mdio_controller *)info->regs)->mdio_stat,
- MDIO_STAT_CLKDIV(258));
+ MDIO_STAT_CLKDIV(258) | MDIO_STAT_NEG);
return mdio_register(bus);
}
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