Add support for this in the qca8k driver. Also add support for SGMII rx/tx clock falling edge. This is only present for pad0, pad5 and pad6 have these bit reserved from Documentation. Add a comment that this is hardcoded to PAD0 as qca8327/28/34/37 have an unique sgmii line and setting falling in port0 applies to both configuration with sgmii used for port0 or port6. Signed-off-by: Matthew Hagan <mnhagan88@xxxxxxxxx> Signed-off-by: Ansuel Smith <ansuelsmth@xxxxxxxxx> --- drivers/net/dsa/qca8k.c | 25 +++++++++++++++++++++++++ drivers/net/dsa/qca8k.h | 3 +++ 2 files changed, 28 insertions(+) diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index a892b897cd0d..3e4a12d6d61c 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -1172,6 +1172,7 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, const struct phylink_link_state *state) { struct qca8k_priv *priv = ds->priv; + struct dsa_port *dp; u32 reg, val; int ret; @@ -1240,6 +1241,8 @@ 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); @@ -1274,6 +1277,28 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, } qca8k_write(priv, QCA8K_REG_SGMII_CTRL, val); + + /* For qca8327/qca8328/qca8334/qca8338 sgmii is unique and + * falling edge is set writing in the PORT0 PAD reg + */ + if (priv->switch_id == QCA8K_ID_QCA8327 || + priv->switch_id == QCA8K_ID_QCA8337) + reg = QCA8K_REG_PORT0_PAD_CTRL; + + val = 0; + + /* SGMII Clock phase configuration */ + if (of_property_read_bool(dp->dn, "qca,sgmii-rxclk-falling-edge")) + val |= QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE; + + if (of_property_read_bool(dp->dn, "qca,sgmii-txclk-falling-edge")) + val |= QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE; + + if (val) + ret = qca8k_rmw(priv, reg, + QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE | + QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE, + val); break; default: dev_err(ds->dev, "xMII mode %s not supported for port %d\n", diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h index fc7db94cc0c9..3fded69a6839 100644 --- a/drivers/net/dsa/qca8k.h +++ b/drivers/net/dsa/qca8k.h @@ -35,6 +35,9 @@ #define QCA8K_MASK_CTRL_DEVICE_ID_MASK GENMASK(15, 8) #define QCA8K_MASK_CTRL_DEVICE_ID(x) ((x) >> 8) #define QCA8K_REG_PORT0_PAD_CTRL 0x004 +#define QCA8K_PORT0_PAD_CTRL_MAC06_EXCHG BIT(31) +#define QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE BIT(19) +#define QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE BIT(18) #define QCA8K_REG_PORT5_PAD_CTRL 0x008 #define QCA8K_REG_PORT6_PAD_CTRL 0x00c #define QCA8K_PORT_PAD_RGMII_EN BIT(26) -- 2.32.0