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ar71xx: allow to override at803x sgmii aneg status

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When checking the outcome of the PHY autonegotiation status, at803x
currently returns false in case the SGMII side is not established.

Due to a hardware-bug, ag71xx needs to fixup the SoCs SGMII side, which
it can't as it is not aware of the link-establishment.

This commit allows to ignore the SGMII side autonegotiation status to
allow ag71xx to do the fixup work.

Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer 2018-08-06 16:15:05 +02:00 committed by John Crispin
parent f4f99ec973
commit 4e39e213af
2 changed files with 43 additions and 0 deletions
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1
target/linux/ar71xx/files/arch/mips/ath79/mach-fritz450e.c
View file

@ -122,6 +122,7 @@ static struct gpio_keys_button fritz450E_gpio_keys[] __initdata = {
static struct at803x_platform_data fritz450E_at803x_data = {
.disable_smarteee = 1,
.has_reset_gpio = 1,
.override_sgmii_aneg = 1,
.reset_gpio = FRITZ450E_GPIO_PHY_RESET,
};

42
target/linux/ar71xx/patches-4.9/903-at803x-add-sgmii-aneg-override-pdata.patch Normal file
View file

@ -0,0 +1,42 @@
Index: linux-4.9.111/drivers/net/phy/at803x.c
===================================================================
--- linux-4.9.111.orig/drivers/net/phy/at803x.c
+++ linux-4.9.111/drivers/net/phy/at803x.c
@@ -461,12 +461,15 @@ static void at803x_link_change_notify(st
static int at803x_aneg_done(struct phy_device *phydev)
{
+ struct at803x_platform_data *pdata;
int ccr;
int aneg_done = genphy_aneg_done(phydev);
if (aneg_done != BMSR_ANEGCOMPLETE)
return aneg_done;
+ pdata = dev_get_platdata(&phydev->mdio.dev);
+
/*
* in SGMII mode, if copper side autoneg is successful,
* also check SGMII side autoneg result
@@ -481,7 +484,8 @@ static int at803x_aneg_done(struct phy_d
/* check if the SGMII link is OK. */
if (!(phy_read(phydev, AT803X_PSSR) & AT803X_PSSR_MR_AN_COMPLETE)) {
pr_warn("803x_aneg_done: SGMII link is not ok\n");
- aneg_done = 0;
+ if (!pdata || !pdata->override_sgmii_aneg)
+ aneg_done = 0;
}
/* switch back to copper page */
phy_write(phydev, AT803X_REG_CHIP_CONFIG, ccr | AT803X_BT_BX_REG_SEL);
Index: linux-4.9.111/include/linux/platform_data/phy-at803x.h
===================================================================
--- linux-4.9.111.orig/include/linux/platform_data/phy-at803x.h
+++ linux-4.9.111/include/linux/platform_data/phy-at803x.h
@@ -7,6 +7,7 @@ struct at803x_platform_data {
int enable_rgmii_rx_delay:1;
int fixup_rgmii_tx_delay:1;
int has_reset_gpio:1;
+ int override_sgmii_aneg:1;
int reset_gpio;
};