diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 424fa2fe31c6..aec230353ac4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -178,6 +178,38 @@ int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled) EXPORT_SYMBOL_GPL(stmmac_bus_clks_config); /** + * stmmac_set_clk_tx_rate() - set the clock rate for the MAC transmit clock + * @bsp_priv: BSP private data structure (unused) + * @clk_tx_i: the transmit clock + * @interface: the selected interface mode + * @speed: the speed that the MAC will be operating at + * + * Set the transmit clock rate for the MAC, normally 2.5MHz for 10Mbps, + * 25MHz for 100Mbps and 125MHz for 1Gbps. This is suitable for at least + * MII, GMII, RGMII and RMII interface modes. Platforms can hook this into + * the plat_data->set_clk_tx_rate method directly, call it via their own + * implementation, or implement their own method should they have more + * complex requirements. It is intended to only be used in this method. + * + * plat_data->clk_tx_i must be filled in. + */ +int stmmac_set_clk_tx_rate(void *bsp_priv, struct clk *clk_tx_i, + phy_interface_t interface, int speed) +{ + long rate = rgmii_clock(speed); + + /* Silently ignore unsupported speeds as rgmii_clock() only + * supports 10, 100 and 1000Mbps. We do not want to spit + * errors for 2500 and higher speeds here. + */ + if (rate < 0) + return 0; + + return clk_set_rate(clk_tx_i, rate); +} +EXPORT_SYMBOL_GPL(stmmac_set_clk_tx_rate); + +/** * stmmac_verify_args - verify the driver parameters. * Description: it checks the driver parameters and set a default in case of * errors. @@ -928,6 +960,7 @@ static void stmmac_mac_link_up(struct phylink_config *config, struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); unsigned int flow_ctrl; u32 old_ctrl, ctrl; + int ret; if ((priv->plat->flags & STMMAC_FLAG_SERDES_UP_AFTER_PHY_LINKUP) && priv->plat->serdes_powerup) @@ -1020,6 +1053,16 @@ static void stmmac_mac_link_up(struct phylink_config *config, if (ctrl != old_ctrl) writel(ctrl, priv->ioaddr + MAC_CTRL_REG); + if (priv->plat->set_clk_tx_rate) { + ret = priv->plat->set_clk_tx_rate(priv->plat->bsp_priv, + priv->plat->clk_tx_i, + interface, speed); + if (ret < 0) + netdev_err(priv->dev, + "failed to configure transmit clock for %dMbps: %pe\n", + speed, ERR_PTR(ret)); + } + stmmac_mac_set(priv, priv->ioaddr, true); if (priv->dma_cap.eee) stmmac_set_eee_pls(priv, priv->hw, true); |