2022-09-20 10:01:48 +00:00
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From: Jonas Gorski <jogo@openwrt.org>
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Subject: ar71xx: add a workaround for ar8316 not always driving the TA bit to low
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AR8316 behind a GPIO bitbanged MDIO bus fails to drive the turnaround bit
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to low despite returning a valid value. Ignore it and just use the
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returned value anyway.
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SVN-Revision: 28422
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---
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drivers/net/mdio/mdio-bitbang.c | 16 ++-----------------
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1 file changed, 2 insertions(+), 14 deletions(-)
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2022-03-27 21:12:39 +00:00
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--- a/drivers/net/mdio/mdio-bitbang.c
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+++ b/drivers/net/mdio/mdio-bitbang.c
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@@ -152,7 +152,7 @@ static int mdiobb_cmd_addr(struct mdiobb
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int mdiobb_read(struct mii_bus *bus, int phy, int reg)
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{
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struct mdiobb_ctrl *ctrl = bus->priv;
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- int ret, i;
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+ int ret;
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if (reg & MII_ADDR_C45) {
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reg = mdiobb_cmd_addr(ctrl, phy, reg);
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@@ -162,19 +162,7 @@ int mdiobb_read(struct mii_bus *bus, int
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ctrl->ops->set_mdio_dir(ctrl, 0);
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- /* check the turnaround bit: the PHY should be driving it to zero, if this
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- * PHY is listed in phy_ignore_ta_mask as having broken TA, skip that
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- */
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- if (mdiobb_get_bit(ctrl) != 0 &&
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- !(bus->phy_ignore_ta_mask & (1 << phy))) {
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- /* PHY didn't drive TA low -- flush any bits it
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- * may be trying to send.
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- */
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- for (i = 0; i < 32; i++)
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- mdiobb_get_bit(ctrl);
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-
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- return 0xffff;
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- }
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+ mdiobb_get_bit(ctrl);
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ret = mdiobb_get_num(ctrl, 16);
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mdiobb_get_bit(ctrl);
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