From: Daniel Thompson QCA8081 appears in embedded board designs paired with GPIO controlled regulators for its power rails. Add logic to allow these regulators to be turned on during a probe. In order to avoid the complexity of tracking state for suspend with and without WoL we take a tremendously simple "always-on" approach to regulator management, essentially relying on BMCR_PDOWN to conserve power when the phy device exists. Signed-off-by: Daniel Thompson Co-developed-by: Alex Elder Signed-off-by: Alex Elder --- drivers/net/phy/qcom/qca808x.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/phy/qcom/qca808x.c b/drivers/net/phy/qcom/qca808x.c index bab26e4c61408..6e2bd753257d9 100644 --- a/drivers/net/phy/qcom/qca808x.c +++ b/drivers/net/phy/qcom/qca808x.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ #include +#include #include #include "qcom.h" @@ -181,15 +182,44 @@ static void qca808x_fill_possible_interfaces(struct phy_device *phydev) __set_bit(PHY_INTERFACE_MODE_2500BASEX, possible); } +static int qca808x_power_on(struct phy_device *phydev) +{ +#ifdef CONFIG_OF + static const char * const regulator_names[] = { + "avdd18", "vdd", "vdd18", "vdd125" + }; + struct device *dev = &phydev->mdio.dev; + u32 count = 0; + int i, ret; + + for (i = 0; i < ARRAY_SIZE(regulator_names); i++) { + ret = devm_regulator_get_enable_optional(dev, regulator_names[i]); + if (!ret) + count++; + else if (ret != -ENODEV) + return ret; + } + + if (count) + fsleep(phydev->mdio.reset_assert_delay); +#endif + return 0; +} + static int qca808x_probe(struct phy_device *phydev) { struct device *dev = &phydev->mdio.dev; struct qca808x_priv *priv; + int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; + ret = qca808x_power_on(phydev); + if (ret) + return ret; + priv->led_polarity_mode = QCA808X_PHY_LED_UNSET; phydev->priv = priv; -- 2.53.0