From: Marco Felsch <m.felsch@pengutronix.de> To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, peppe.cavallaro@st.com, alexandre.torgue@foss.st.com, joabreu@synopsys.com, mcoquelin.stm32@gmail.com Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH net-next v3 2/2] net: stmmac: add support for phy-supply Date: Thu, 20 Jul 2023 09:23:04 +0200 [thread overview] Message-ID: <20230720072304.3358701-2-m.felsch@pengutronix.de> (raw) In-Reply-To: <20230720072304.3358701-1-m.felsch@pengutronix.de> Add generic phy-supply handling support to control the phy regulator to avoid handling it within the glue code. Use the generic stmmac_platform code to register a possible phy-supply and the stmmac_main code to handle the power on/off. Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> --- Changelog v3: - rebased onto net-next/main - fixed changelog style v2: - adapt stmmac_phy_power - move power-on/off into stmmac_main to handle WOL - adapt commit message .../net/ethernet/stmicro/stmmac/stmmac_main.c | 58 ++++++++++++++++++- .../ethernet/stmicro/stmmac/stmmac_platform.c | 10 ++++ include/linux/stmmac.h | 1 + 3 files changed, 68 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index e7ca52f0d2f2d..6ffb03abddfd9 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -31,6 +31,7 @@ #include <linux/pm_runtime.h> #include <linux/prefetch.h> #include <linux/pinctrl/consumer.h> +#include <linux/regulator/consumer.h> #ifdef CONFIG_DEBUG_FS #include <linux/debugfs.h> #include <linux/seq_file.h> @@ -1128,6 +1129,55 @@ static void stmmac_check_pcs_mode(struct stmmac_priv *priv) } } +/** + * stmmac_phy_power - PHY regulator on/off + * @priv: driver private structure + * @enable: turn on the regulator if true else turn it off + * Enable or disable the regulator powering the PHY. + */ +static int stmmac_phy_power(struct stmmac_priv *priv, bool enable) +{ + struct regulator *regulator = priv->plat->phy_regulator; + struct device *dev = priv->device; + + if (!regulator) + return 0; + + if (enable) { + int ret; + + ret = regulator_enable(regulator); + if (ret) + dev_err(dev, "Fail to enable regulator\n"); + + return ret; + } + + regulator_disable(regulator); + + return 0; +} + +/** + * stmmac_phy_power_on - PHY regulator on + * @priv: driver private structure + * Enable the PHY regulator + */ +static int stmmac_phy_power_on(struct stmmac_priv *priv) +{ + return stmmac_phy_power(priv, true); +} + +/** + * stmmac_phy_power_off - PHY regulator off + * @priv: driver private structure + * Disable the PHY regulator + */ +static void stmmac_phy_power_off(struct stmmac_priv *priv) +{ + stmmac_phy_power(priv, false); +} + /** * stmmac_init_phy - PHY initialization * @dev: net device structure @@ -1253,7 +1303,8 @@ static int stmmac_phy_setup(struct stmmac_priv *priv) return PTR_ERR(phylink); priv->phylink = phylink; - return 0; + + return stmmac_phy_power_on(priv); } static void stmmac_display_rx_rings(struct stmmac_priv *priv, @@ -7588,6 +7639,7 @@ void stmmac_dvr_remove(struct device *dev) if (priv->hw->pcs != STMMAC_PCS_TBI && priv->hw->pcs != STMMAC_PCS_RTBI) stmmac_mdio_unregister(ndev); + stmmac_phy_power_off(priv); destroy_workqueue(priv->wq); mutex_destroy(&priv->lock); bitmap_free(priv->af_xdp_zc_qps); @@ -7651,6 +7703,8 @@ int stmmac_suspend(struct device *dev) if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); phylink_suspend(priv->phylink, false); + if (!priv->plat->use_phy_wol) + stmmac_phy_power_off(priv); } rtnl_unlock(); @@ -7733,6 +7787,8 @@ int stmmac_resume(struct device *dev) priv->irq_wake = 0; } else { pinctrl_pm_select_default_state(priv->device); + if (!priv->plat->use_phy_wol) + stmmac_phy_power_on(priv); /* reset the phy so that it's ready */ if (priv->mii) stmmac_mdio_reset(priv->mii); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 23d53ea04b24d..18988da4614cd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -11,6 +11,7 @@ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> #include <linux/module.h> #include <linux/io.h> #include <linux/of.h> @@ -424,6 +425,15 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) if (plat->interface < 0) plat->interface = plat->phy_interface; + /* Optional regulator for PHY */ + plat->phy_regulator = devm_regulator_get_optional(&pdev->dev, "phy"); + if (IS_ERR(plat->phy_regulator)) { + if (PTR_ERR(plat->phy_regulator) == -EPROBE_DEFER) + return ERR_CAST(plat->phy_regulator); + dev_info(&pdev->dev, "No regulator found\n"); + plat->phy_regulator = NULL; + } + /* Some wrapper drivers still rely on phy_node. Let's save it while * they are not converted to phylink. */ plat->phy_node = of_parse_phandle(np, "phy-handle", 0); diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index ef67dba775d04..b5d2d75de2759 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -222,6 +222,7 @@ struct plat_stmmacenet_data { int phy_addr; int interface; phy_interface_t phy_interface; + struct regulator *phy_regulator; struct stmmac_mdio_bus_data *mdio_bus_data; struct device_node *phy_node; struct device_node *phylink_node; -- 2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Marco Felsch <m.felsch@pengutronix.de> To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, peppe.cavallaro@st.com, alexandre.torgue@foss.st.com, joabreu@synopsys.com, mcoquelin.stm32@gmail.com Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH net-next v3 2/2] net: stmmac: add support for phy-supply Date: Thu, 20 Jul 2023 09:23:04 +0200 [thread overview] Message-ID: <20230720072304.3358701-2-m.felsch@pengutronix.de> (raw) In-Reply-To: <20230720072304.3358701-1-m.felsch@pengutronix.de> Add generic phy-supply handling support to control the phy regulator to avoid handling it within the glue code. Use the generic stmmac_platform code to register a possible phy-supply and the stmmac_main code to handle the power on/off. Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> --- Changelog v3: - rebased onto net-next/main - fixed changelog style v2: - adapt stmmac_phy_power - move power-on/off into stmmac_main to handle WOL - adapt commit message .../net/ethernet/stmicro/stmmac/stmmac_main.c | 58 ++++++++++++++++++- .../ethernet/stmicro/stmmac/stmmac_platform.c | 10 ++++ include/linux/stmmac.h | 1 + 3 files changed, 68 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index e7ca52f0d2f2d..6ffb03abddfd9 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -31,6 +31,7 @@ #include <linux/pm_runtime.h> #include <linux/prefetch.h> #include <linux/pinctrl/consumer.h> +#include <linux/regulator/consumer.h> #ifdef CONFIG_DEBUG_FS #include <linux/debugfs.h> #include <linux/seq_file.h> @@ -1128,6 +1129,55 @@ static void stmmac_check_pcs_mode(struct stmmac_priv *priv) } } +/** + * stmmac_phy_power - PHY regulator on/off + * @priv: driver private structure + * @enable: turn on the regulator if true else turn it off + * Enable or disable the regulator powering the PHY. + */ +static int stmmac_phy_power(struct stmmac_priv *priv, bool enable) +{ + struct regulator *regulator = priv->plat->phy_regulator; + struct device *dev = priv->device; + + if (!regulator) + return 0; + + if (enable) { + int ret; + + ret = regulator_enable(regulator); + if (ret) + dev_err(dev, "Fail to enable regulator\n"); + + return ret; + } + + regulator_disable(regulator); + + return 0; +} + +/** + * stmmac_phy_power_on - PHY regulator on + * @priv: driver private structure + * Enable the PHY regulator + */ +static int stmmac_phy_power_on(struct stmmac_priv *priv) +{ + return stmmac_phy_power(priv, true); +} + +/** + * stmmac_phy_power_off - PHY regulator off + * @priv: driver private structure + * Disable the PHY regulator + */ +static void stmmac_phy_power_off(struct stmmac_priv *priv) +{ + stmmac_phy_power(priv, false); +} + /** * stmmac_init_phy - PHY initialization * @dev: net device structure @@ -1253,7 +1303,8 @@ static int stmmac_phy_setup(struct stmmac_priv *priv) return PTR_ERR(phylink); priv->phylink = phylink; - return 0; + + return stmmac_phy_power_on(priv); } static void stmmac_display_rx_rings(struct stmmac_priv *priv, @@ -7588,6 +7639,7 @@ void stmmac_dvr_remove(struct device *dev) if (priv->hw->pcs != STMMAC_PCS_TBI && priv->hw->pcs != STMMAC_PCS_RTBI) stmmac_mdio_unregister(ndev); + stmmac_phy_power_off(priv); destroy_workqueue(priv->wq); mutex_destroy(&priv->lock); bitmap_free(priv->af_xdp_zc_qps); @@ -7651,6 +7703,8 @@ int stmmac_suspend(struct device *dev) if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); phylink_suspend(priv->phylink, false); + if (!priv->plat->use_phy_wol) + stmmac_phy_power_off(priv); } rtnl_unlock(); @@ -7733,6 +7787,8 @@ int stmmac_resume(struct device *dev) priv->irq_wake = 0; } else { pinctrl_pm_select_default_state(priv->device); + if (!priv->plat->use_phy_wol) + stmmac_phy_power_on(priv); /* reset the phy so that it's ready */ if (priv->mii) stmmac_mdio_reset(priv->mii); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 23d53ea04b24d..18988da4614cd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -11,6 +11,7 @@ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> #include <linux/module.h> #include <linux/io.h> #include <linux/of.h> @@ -424,6 +425,15 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) if (plat->interface < 0) plat->interface = plat->phy_interface; + /* Optional regulator for PHY */ + plat->phy_regulator = devm_regulator_get_optional(&pdev->dev, "phy"); + if (IS_ERR(plat->phy_regulator)) { + if (PTR_ERR(plat->phy_regulator) == -EPROBE_DEFER) + return ERR_CAST(plat->phy_regulator); + dev_info(&pdev->dev, "No regulator found\n"); + plat->phy_regulator = NULL; + } + /* Some wrapper drivers still rely on phy_node. Let's save it while * they are not converted to phylink. */ plat->phy_node = of_parse_phandle(np, "phy-handle", 0); diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index ef67dba775d04..b5d2d75de2759 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -222,6 +222,7 @@ struct plat_stmmacenet_data { int phy_addr; int interface; phy_interface_t phy_interface; + struct regulator *phy_regulator; struct stmmac_mdio_bus_data *mdio_bus_data; struct device_node *phy_node; struct device_node *phylink_node; -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-07-20 7:24 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-07-20 7:23 [PATCH net-next v3 1/2] dt-bindings: net: snps,dwmac: add phy-supply support Marco Felsch 2023-07-20 7:23 ` Marco Felsch 2023-07-20 7:23 ` Marco Felsch [this message] 2023-07-20 7:23 ` [PATCH net-next v3 2/2] net: stmmac: add support for phy-supply Marco Felsch 2023-07-21 3:11 ` Jakub Kicinski 2023-07-21 3:11 ` Jakub Kicinski 2023-07-21 9:38 ` Marco Felsch 2023-07-21 9:38 ` Marco Felsch 2023-07-21 20:31 ` kernel test robot 2023-07-21 20:31 ` kernel test robot 2023-07-31 8:54 ` Marco Felsch 2023-07-31 8:54 ` Marco Felsch
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