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ath79: ensure QCA956x gmac0 mux selects sgmii

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Some bootloaders do not set up gmac0 properly, leaving it disconnected
from the sgmii interface. If the user specificies phy-mode sgmii, then
use the gmac-config/device node to ensure the mux is configured
correctly.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
This commit is contained in:
Sander Vanheule 2020-07-19 20:01:48 +02:00 committed by Petr Štetiar
parent c0af4a0ca2
commit 8dd2a1715b
1 changed files with 35 additions and 0 deletions
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35
target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
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@ -665,6 +665,37 @@ out:
of_node_put(np);
}
static void ag71xx_mux_select_sgmii_qca956x(struct device_node *np)
{
struct device_node *np_dev;
void __iomem *gmac_base;
u32 t;
np = of_get_child_by_name(np, "gmac-config");
if (!np)
return;
np_dev = of_parse_phandle(np, "device", 0);
if (!np_dev)
goto out;
gmac_base = of_iomap(np_dev, 0);
if (!gmac_base) {
pr_err("%pOF: can't map GMAC registers\n", np_dev);
goto err_iomap;
}
t = __raw_readl(gmac_base + QCA956X_GMAC_REG_ETH_CFG);
t |= QCA956X_ETH_CFG_GE0_SGMII;
__raw_writel(t, gmac_base + QCA956X_GMAC_REG_ETH_CFG);
iounmap(gmac_base);
err_iomap:
of_node_put(np_dev);
out:
of_node_put(np);
}
static void ath79_mii_ctrl_set_if(struct ag71xx *ag, unsigned int mii_if)
{
u32 t;
@ -1566,6 +1597,10 @@ static int ag71xx_probe(struct platform_device *pdev)
return ag->phy_if_mode;
}
if (of_device_is_compatible(np, "qca,qca9560-eth") &&
ag->phy_if_mode == PHY_INTERFACE_MODE_SGMII)
ag71xx_mux_select_sgmii_qca956x(np);
if (of_property_read_u32(np, "qca,mac-idx", &ag->mac_idx))
ag->mac_idx = -1;
if (ag->mii_base)