[net-next PATCH v2 10/15] net: dsa: qca8k: add explicit SGMII PLL enable
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: 2021-10-08 00:23:40
Also in:
linux-devicetree, lkml
Subsystem:
networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Linus Torvalds
Support enabling PLL on the SGMII CPU port. Some device require this special configuration or no traffic is transmitted and the switch doesn't work at all. A dedicated binding is added to the CPU node port to apply the correct reg on mac config. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> --- drivers/net/dsa/qca8k.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 05ecec4ebc01..8917bb154e8f 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c@@ -1237,6 +1237,8 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, break; case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_1000BASEX: + dp = dsa_to_port(ds, port); + /* Enable SGMII on the port */ qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
@@ -1255,8 +1257,11 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, if (ret) return; - val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX | - QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD; + val |= QCA8K_SGMII_EN_SD; + + if (of_property_read_bool(dp->dn, "qca,sgmii-enable-pll")) + val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX | + QCA8K_SGMII_EN_TX; if (dsa_is_cpu_port(ds, port)) { /* CPU port, we're talking to the CPU MAC, be a PHY */
--
2.32.0