1 // SPDX-License-Identifier: GPL-2.0
3  * Amlogic AXG PCIE PHY driver
8 #include <linux/phy/phy.h>
13 #include <dt-bindings/phy/phy.h>
28 	struct phy *phy;  member
29 	struct phy *analog;
41 static int phy_axg_pcie_power_on(struct phy *phy)  in phy_axg_pcie_power_on()  argument
43 	struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);  in phy_axg_pcie_power_on()
46 	ret = phy_power_on(priv->analog);  in phy_axg_pcie_power_on()
50 	regmap_update_bits(priv->regmap, MESON_PCIE_REG0,  in phy_axg_pcie_power_on()
55 static int phy_axg_pcie_power_off(struct phy *phy)  in phy_axg_pcie_power_off()  argument
57 	struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);  in phy_axg_pcie_power_off()
60 	ret = phy_power_off(priv->analog);  in phy_axg_pcie_power_off()
64 	regmap_update_bits(priv->regmap, MESON_PCIE_REG0,  in phy_axg_pcie_power_off()
69 static int phy_axg_pcie_init(struct phy *phy)  in phy_axg_pcie_init()  argument
71 	struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);  in phy_axg_pcie_init()
74 	ret = phy_init(priv->analog);  in phy_axg_pcie_init()
78 	regmap_write(priv->regmap, MESON_PCIE_REG0, MESON_PCIE_PHY_INIT);  in phy_axg_pcie_init()
79 	return reset_control_reset(priv->reset);  in phy_axg_pcie_init()
82 static int phy_axg_pcie_exit(struct phy *phy)  in phy_axg_pcie_exit()  argument
84 	struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);  in phy_axg_pcie_exit()
87 	ret = phy_exit(priv->analog);  in phy_axg_pcie_exit()
91 	return reset_control_reset(priv->reset);  in phy_axg_pcie_exit()
94 static int phy_axg_pcie_reset(struct phy *phy)  in phy_axg_pcie_reset()  argument
96 	struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);  in phy_axg_pcie_reset()
99 	ret = phy_reset(priv->analog);  in phy_axg_pcie_reset()
103 	ret = reset_control_assert(priv->reset);  in phy_axg_pcie_reset()
108 	ret = reset_control_deassert(priv->reset);  in phy_axg_pcie_reset()
129 	struct device *dev = &pdev->dev;  in phy_axg_pcie_probe()
131 	struct device_node *np = dev->of_node;  in phy_axg_pcie_probe()
137 		return -ENOMEM;  in phy_axg_pcie_probe()
139 	priv->phy = devm_phy_create(dev, np, &phy_axg_pcie_ops);  in phy_axg_pcie_probe()
140 	if (IS_ERR(priv->phy)) {  in phy_axg_pcie_probe()
141 		ret = PTR_ERR(priv->phy);  in phy_axg_pcie_probe()
142 		if (ret != -EPROBE_DEFER)  in phy_axg_pcie_probe()
143 			dev_err(dev, "failed to create PHY\n");  in phy_axg_pcie_probe()
151 	priv->regmap = devm_regmap_init_mmio(dev, base,  in phy_axg_pcie_probe()
153 	if (IS_ERR(priv->regmap))  in phy_axg_pcie_probe()
154 		return PTR_ERR(priv->regmap);  in phy_axg_pcie_probe()
156 	priv->reset = devm_reset_control_array_get_exclusive(dev);  in phy_axg_pcie_probe()
157 	if (IS_ERR(priv->reset))  in phy_axg_pcie_probe()
158 		return PTR_ERR(priv->reset);  in phy_axg_pcie_probe()
160 	priv->analog = devm_phy_get(dev, "analog");  in phy_axg_pcie_probe()
161 	if (IS_ERR(priv->analog))  in phy_axg_pcie_probe()
162 		return PTR_ERR(priv->analog);  in phy_axg_pcie_probe()
164 	phy_set_drvdata(priv->phy, priv);  in phy_axg_pcie_probe()
173 		.compatible = "amlogic,axg-pcie-phy",
182 		.name = "phy-axg-pcie",
189 MODULE_DESCRIPTION("Amlogic AXG PCIE PHY driver");