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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , Maxime Coquelin , Andrew Halaney Cc: netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Bartosz Golaszewski Subject: [RESEND PATCH v2 08/14] net: stmmac: dwmac-qcom-ethqos: add support for the optional serdes phy Date: Mon, 19 Jun 2023 11:23:56 +0200 Message-Id: <20230619092402.195578-9-brgl@bgdev.pl> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230619092402.195578-1-brgl@bgdev.pl> References: <20230619092402.195578-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bartosz Golaszewski On sa8775p platforms, there's a SGMII SerDes PHY between the MAC and external PHY that we need to enable and configure. Signed-off-by: Bartosz Golaszewski --- .../stmicro/stmmac/dwmac-qcom-ethqos.c | 37 +++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c index ec3bbd199501..042733b5e80b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include "stmmac.h" @@ -93,6 +94,7 @@ struct qcom_ethqos { unsigned int rgmii_clk_rate; struct clk *rgmii_clk; + struct phy *serdes_phy; unsigned int speed; const struct ethqos_emac_por *por; @@ -565,6 +567,30 @@ static void ethqos_fix_mac_speed(void *priv, unsigned int speed) ethqos_configure(ethqos); } +static int qcom_ethqos_serdes_powerup(struct net_device *ndev, void *priv) +{ + struct qcom_ethqos *ethqos = priv; + int ret; + + ret = phy_init(ethqos->serdes_phy); + if (ret) + return ret; + + ret = phy_power_on(ethqos->serdes_phy); + if (ret) + return ret; + + return phy_set_speed(ethqos->serdes_phy, ethqos->speed); +} + +static void qcom_ethqos_serdes_powerdown(struct net_device *ndev, void *priv) +{ + struct qcom_ethqos *ethqos = priv; + + phy_power_off(ethqos->serdes_phy); + phy_exit(ethqos->serdes_phy); +} + static int ethqos_clks_config(void *priv, bool enabled) { struct qcom_ethqos *ethqos = priv; @@ -650,6 +676,12 @@ static int qcom_ethqos_probe(struct platform_device *pdev) if (ret) goto out_config_dt; + ethqos->serdes_phy = devm_phy_optional_get(dev, "serdes"); + if (IS_ERR(ethqos->serdes_phy)) { + ret = PTR_ERR(ethqos->serdes_phy); + goto out_config_dt; + } + ethqos->speed = SPEED_1000; ethqos_update_rgmii_clk(ethqos, SPEED_1000); ethqos_set_func_clk_en(ethqos); @@ -665,6 +697,11 @@ static int qcom_ethqos_probe(struct platform_device *pdev) if (of_device_is_compatible(np, "qcom,qcs404-ethqos")) plat_dat->rx_clk_runs_in_lpi = 1; + if (ethqos->serdes_phy) { + plat_dat->serdes_powerup = qcom_ethqos_serdes_powerup; + plat_dat->serdes_powerdown = qcom_ethqos_serdes_powerdown; + } + ret = stmmac_dvr_probe(dev, plat_dat, &stmmac_res); if (ret) goto out_config_dt; -- 2.39.2