1 // SPDX-License-Identifier: GPL-2.0+
3  * Salvo PHY is a 28nm PHY, it is a legacy PHY, and only
6  * Copyright (c) 2019-2020 NXP
12 #include <linux/phy/phy.h>
18 /* PHY register definition */
105 	struct phy *phy;  member
114 	return (u16)readl(salvo_phy->base +  in cdns_salvo_read()
115 		reg * (1 << salvo_phy->data->reg_offset_shift));  in cdns_salvo_read()
121 	writel(val, salvo_phy->base +  in cdns_salvo_write()
122 		reg * (1 << salvo_phy->data->reg_offset_shift));  in cdns_salvo_write()
126  * Below bringup sequence pair are from Cadence PHY's User Guide
208 static int cdns_salvo_phy_init(struct phy *phy)  in cdns_salvo_phy_init()  argument
210 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_init()
211 	struct cdns_salvo_data *data = salvo_phy->data;  in cdns_salvo_phy_init()
215 	ret = clk_prepare_enable(salvo_phy->clk);  in cdns_salvo_phy_init()
219 	for (i = 0; i < data->init_sequence_length; i++) {  in cdns_salvo_phy_init()
220 		const struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;  in cdns_salvo_phy_init()
222 		cdns_salvo_write(salvo_phy, reg_pair->off, reg_pair->val);  in cdns_salvo_phy_init()
233 	clk_disable_unprepare(salvo_phy->clk);  in cdns_salvo_phy_init()
238 static int cdns_salvo_phy_power_on(struct phy *phy)  in cdns_salvo_phy_power_on()  argument
240 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_power_on()
242 	return clk_prepare_enable(salvo_phy->clk);  in cdns_salvo_phy_power_on()
245 static int cdns_salvo_phy_power_off(struct phy *phy)  in cdns_salvo_phy_power_off()  argument
247 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_power_off()
249 	clk_disable_unprepare(salvo_phy->clk);  in cdns_salvo_phy_power_off()
264 	struct device *dev = &pdev->dev;  in cdns_salvo_phy_probe()
272 		return -EINVAL;  in cdns_salvo_phy_probe()
274 	data = (struct cdns_salvo_data *)match->data;  in cdns_salvo_phy_probe()
277 		return -ENOMEM;  in cdns_salvo_phy_probe()
279 	salvo_phy->data = data;  in cdns_salvo_phy_probe()
280 	salvo_phy->clk = devm_clk_get_optional(dev, "salvo_phy_clk");  in cdns_salvo_phy_probe()
281 	if (IS_ERR(salvo_phy->clk))  in cdns_salvo_phy_probe()
282 		return PTR_ERR(salvo_phy->clk);  in cdns_salvo_phy_probe()
285 	salvo_phy->base = devm_ioremap_resource(dev, res);  in cdns_salvo_phy_probe()
286 	if (IS_ERR(salvo_phy->base))  in cdns_salvo_phy_probe()
287 		return PTR_ERR(salvo_phy->base);  in cdns_salvo_phy_probe()
289 	salvo_phy->phy = devm_phy_create(dev, NULL, &cdns_salvo_phy_ops);  in cdns_salvo_phy_probe()
290 	if (IS_ERR(salvo_phy->phy))  in cdns_salvo_phy_probe()
291 		return PTR_ERR(salvo_phy->phy);  in cdns_salvo_phy_probe()
293 	phy_set_drvdata(salvo_phy->phy, salvo_phy);  in cdns_salvo_phy_probe()
307 		.compatible = "nxp,salvo-phy",
317 		.name	= "cdns-salvo-phy",
325 MODULE_DESCRIPTION("Cadence SALVO PHY Driver");