Add EPHY CLK and RESET support for sun8i_emac driver to enable EPHY TX clock and EPHY reset pins via CLK and RESET framework.
Cc: Joe Hershberger joe.hershberger@ni.com Cc: Lothar Felten lothar.felten@gmail.com Signed-off-by: Jagan Teki jagan@amarulasolutions.com --- drivers/net/sun8i_emac.c | 72 ++++++++++++++++++++++++++++++---------- 1 file changed, 55 insertions(+), 17 deletions(-)
diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c index 98bd7a5823..28347cb543 100644 --- a/drivers/net/sun8i_emac.c +++ b/drivers/net/sun8i_emac.c @@ -138,7 +138,9 @@ struct emac_eth_dev { struct phy_device *phydev; struct mii_dev *bus; struct clk tx_clk; + struct clk ephy_clk; struct reset_ctl tx_rst; + struct reset_ctl ephy_rst; #ifdef CONFIG_DM_GPIO struct gpio_desc reset_gpio; #endif @@ -653,7 +655,6 @@ static int sun8i_eth_write_hwaddr(struct udevice *dev)
static int sun8i_emac_board_setup(struct emac_eth_dev *priv) { - struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; int ret;
ret = clk_enable(&priv->tx_clk); @@ -670,16 +671,20 @@ static int sun8i_emac_board_setup(struct emac_eth_dev *priv) } }
- if (priv->variant == H3_EMAC) { - /* Only H3/H5 have clock controls for internal EPHY */ - if (priv->use_internal_phy) { - /* Set clock gating for ephy */ - setbits_le32(&ccm->bus_gate4, - BIT(AHB_GATE_OFFSET_EPHY)); - - /* Deassert EPHY */ - setbits_le32(&ccm->ahb_reset2_cfg, - BIT(AHB_RESET_OFFSET_EPHY)); + /* Only H3/H5 have clock controls for internal EPHY */ + if (clk_valid(&priv->ephy_clk)) { + ret = clk_enable(&priv->ephy_clk); + if (ret) { + dev_err(dev, "failed to enable EPHY TX clock\n"); + return ret; + } + } + + if (reset_valid(&priv->ephy_rst)) { + ret = reset_deassert(&priv->ephy_rst); + if (ret) { + dev_err(dev, "failed to deassert EPHY TX clock\n"); + return ret; } }
@@ -839,6 +844,42 @@ static const struct eth_ops sun8i_emac_eth_ops = { .stop = sun8i_emac_eth_stop, };
+static int sun8i_get_ephy_nodes(struct emac_eth_dev *priv) +{ + int node, ret; + + /* look for mdio-mux node for internal PHY node */ + node = fdt_path_offset(gd->fdt_blob, + "/soc/ethernet@1c30000/mdio-mux/mdio@1/ethernet-phy@1"); + if (node < 0) { + debug("failed to get mdio-mux with internal PHY\n"); + return node; + } + + ret = fdt_node_check_compatible(gd->fdt_blob, node, + "allwinner,sun8i-h3-mdio-internal"); + if (ret < 0) { + debug("failed to find mdio-internal node\n"); + return ret; + } + + ret = clk_get_by_index_nodev(offset_to_ofnode(node), 0, &priv->ephy_clk); + if (ret) { + dev_err(dev, "failed to get EPHY TX clock\n"); + return ret; + } + + ret = reset_get_by_index_nodev(offset_to_ofnode(node), 0, &priv->ephy_rst); + if (ret) { + dev_err(dev, "failed to get EPHY TX reset\n"); + return ret; + } + + priv->use_internal_phy = true; + + return 0; +} + static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev) { struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev); @@ -920,12 +961,9 @@ static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev) }
if (priv->variant == H3_EMAC) { - int parent = fdt_parent_offset(gd->fdt_blob, offset); - - if (parent >= 0 && - !fdt_node_check_compatible(gd->fdt_blob, parent, - "allwinner,sun8i-h3-mdio-internal")) - priv->use_internal_phy = true; + ret = sun8i_get_ephy_nodes(priv); + if (ret) + return ret; }
priv->interface = pdata->phy_interface;