18 #include <linux/phy/phy.h>
34  * struct cygnus_pcie_phy - Cygnus PCIe PHY device
35  * @core: pointer to the Cygnus PCIe PHY core control
36  * @id: internal ID to identify the Cygnus PCIe PHY
37  * @phy: pointer to the kernel PHY device
42 	struct phy *phy;  member
46  * struct cygnus_pcie_phy_core - Cygnus PCIe PHY core control
50  * @phys: pointer to Cygnus PHY device
59 static int cygnus_pcie_power_config(struct cygnus_pcie_phy *phy, bool enable)  in cygnus_pcie_power_config()  argument
61 	struct cygnus_pcie_phy_core *core = phy->core;  in cygnus_pcie_power_config()
65 	mutex_lock(&core->lock);  in cygnus_pcie_power_config()
67 	switch (phy->id) {  in cygnus_pcie_power_config()
77 		mutex_unlock(&core->lock);  in cygnus_pcie_power_config()
78 		dev_err(core->dev, "PCIe PHY %d invalid\n", phy->id);  in cygnus_pcie_power_config()
79 		return -EINVAL;  in cygnus_pcie_power_config()
83 		val = readl(core->base + PCIE_CFG_OFFSET);  in cygnus_pcie_power_config()
85 		writel(val, core->base + PCIE_CFG_OFFSET);  in cygnus_pcie_power_config()
87 		 * Wait 50 ms for the PCIe Serdes to stabilize after the analog  in cygnus_pcie_power_config()
92 		val = readl(core->base + PCIE_CFG_OFFSET);  in cygnus_pcie_power_config()
94 		writel(val, core->base + PCIE_CFG_OFFSET);  in cygnus_pcie_power_config()
97 	mutex_unlock(&core->lock);  in cygnus_pcie_power_config()
98 	dev_dbg(core->dev, "PCIe PHY %d %s\n", phy->id,  in cygnus_pcie_power_config()
103 static int cygnus_pcie_phy_power_on(struct phy *p)  in cygnus_pcie_phy_power_on()
105 	struct cygnus_pcie_phy *phy = phy_get_drvdata(p);  in cygnus_pcie_phy_power_on()  local
107 	return cygnus_pcie_power_config(phy, true);  in cygnus_pcie_phy_power_on()
110 static int cygnus_pcie_phy_power_off(struct phy *p)  in cygnus_pcie_phy_power_off()
112 	struct cygnus_pcie_phy *phy = phy_get_drvdata(p);  in cygnus_pcie_phy_power_off()  local
114 	return cygnus_pcie_power_config(phy, false);  in cygnus_pcie_phy_power_off()
125 	struct device *dev = &pdev->dev;  in cygnus_pcie_phy_probe()
126 	struct device_node *node = dev->of_node, *child;  in cygnus_pcie_phy_probe()
134 		dev_err(dev, "PHY no child node\n");  in cygnus_pcie_phy_probe()
135 		return -ENODEV;  in cygnus_pcie_phy_probe()
140 		return -ENOMEM;  in cygnus_pcie_phy_probe()
142 	core->dev = dev;  in cygnus_pcie_phy_probe()
145 	core->base = devm_ioremap_resource(dev, res);  in cygnus_pcie_phy_probe()
146 	if (IS_ERR(core->base))  in cygnus_pcie_phy_probe()
147 		return PTR_ERR(core->base);  in cygnus_pcie_phy_probe()
149 	mutex_init(&core->lock);  in cygnus_pcie_phy_probe()
158 			ret = -EINVAL;  in cygnus_pcie_phy_probe()
163 			dev_err(dev, "invalid PHY id: %u\n", id);  in cygnus_pcie_phy_probe()
164 			ret = -EINVAL;  in cygnus_pcie_phy_probe()
168 		if (core->phys[id].phy) {  in cygnus_pcie_phy_probe()
169 			dev_err(dev, "duplicated PHY id: %u\n", id);  in cygnus_pcie_phy_probe()
170 			ret = -EINVAL;  in cygnus_pcie_phy_probe()
174 		p = &core->phys[id];  in cygnus_pcie_phy_probe()
175 		p->phy = devm_phy_create(dev, child, &cygnus_pcie_phy_ops);  in cygnus_pcie_phy_probe()
176 		if (IS_ERR(p->phy)) {  in cygnus_pcie_phy_probe()
177 			dev_err(dev, "failed to create PHY\n");  in cygnus_pcie_phy_probe()
178 			ret = PTR_ERR(p->phy);  in cygnus_pcie_phy_probe()
182 		p->core = core;  in cygnus_pcie_phy_probe()
183 		p->id = id;  in cygnus_pcie_phy_probe()
184 		phy_set_drvdata(p->phy, p);  in cygnus_pcie_phy_probe()
192 		dev_err(dev, "failed to register PHY provider\n");  in cygnus_pcie_phy_probe()
196 	dev_dbg(dev, "registered %u PCIe PHY(s)\n", cnt);  in cygnus_pcie_phy_probe()
205 	{ .compatible = "brcm,cygnus-pcie-phy" },
212 		.name = "cygnus-pcie-phy",
220 MODULE_DESCRIPTION("Broadcom Cygnus PCIe PHY driver");