1 // SPDX-License-Identifier: GPL-2.0
3  * Renesas R-Car Gen3 PCIe PHY driver
12 #include <linux/phy/phy.h>
16 #define PHY_CTRL		0x4000		/* R8A77980 only */
18 /* PHY control register (PHY_CTRL) */
22 	struct phy *phy;  member
27 static void rcar_gen3_phy_pcie_modify_reg(struct phy *p, unsigned int reg,  in rcar_gen3_phy_pcie_modify_reg()
30 	struct rcar_gen3_phy *phy = phy_get_drvdata(p);  in rcar_gen3_phy_pcie_modify_reg()  local
31 	void __iomem *base = phy->base;  in rcar_gen3_phy_pcie_modify_reg()
35 	spin_lock_irqsave(&phy->lock, flags);  in rcar_gen3_phy_pcie_modify_reg()
42 	spin_unlock_irqrestore(&phy->lock, flags);  in rcar_gen3_phy_pcie_modify_reg()
45 static int r8a77980_phy_pcie_power_on(struct phy *p)  in r8a77980_phy_pcie_power_on()
47 	/* Power on the PCIe PHY */  in r8a77980_phy_pcie_power_on()
53 static int r8a77980_phy_pcie_power_off(struct phy *p)  in r8a77980_phy_pcie_power_off()
55 	/* Power off the PCIe PHY */  in r8a77980_phy_pcie_power_off()
68 	{ .compatible = "renesas,r8a77980-pcie-phy" },
75 	struct device *dev = &pdev->dev;  in rcar_gen3_phy_pcie_probe()
77 	struct rcar_gen3_phy *phy;  in rcar_gen3_phy_pcie_probe()  local
81 	if (!dev->of_node) {  in rcar_gen3_phy_pcie_probe()
84 		return -EINVAL;  in rcar_gen3_phy_pcie_probe()
91 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);  in rcar_gen3_phy_pcie_probe()
92 	if (!phy)  in rcar_gen3_phy_pcie_probe()
93 		return -ENOMEM;  in rcar_gen3_phy_pcie_probe()
95 	spin_lock_init(&phy->lock);  in rcar_gen3_phy_pcie_probe()
97 	phy->base = base;  in rcar_gen3_phy_pcie_probe()
100 	 * devm_phy_create() will call pm_runtime_enable(&phy->dev);  in rcar_gen3_phy_pcie_probe()
101 	 * And then, phy-core will manage runtime PM for this device.  in rcar_gen3_phy_pcie_probe()
105 	phy->phy = devm_phy_create(dev, NULL, &r8a77980_phy_pcie_ops);  in rcar_gen3_phy_pcie_probe()
106 	if (IS_ERR(phy->phy)) {  in rcar_gen3_phy_pcie_probe()
107 		dev_err(dev, "Failed to create PCIe PHY\n");  in rcar_gen3_phy_pcie_probe()
108 		error = PTR_ERR(phy->phy);  in rcar_gen3_phy_pcie_probe()
111 	phy_set_drvdata(phy->phy, phy);  in rcar_gen3_phy_pcie_probe()
115 		dev_err(dev, "Failed to register PHY provider\n");  in rcar_gen3_phy_pcie_probe()
130 	pm_runtime_disable(&pdev->dev);  in rcar_gen3_phy_pcie_remove()
145 MODULE_DESCRIPTION("Renesas R-Car Gen3 PCIe PHY");