1 // SPDX-License-Identifier: GPL-2.0-only
3  * Samsung SATA SerDes(PHY) driver
10 #include <linux/clk.h>
50 	struct clk *phyclk;
66 	return -EFAULT;  in wait_for_reg_status()
73 	return regmap_update_bits(sata_phy->pmureg, SATAPHY_CONTROL_OFFSET,  in exynos_sata_phy_power_on()
82 	return regmap_update_bits(sata_phy->pmureg, SATAPHY_CONTROL_OFFSET,  in exynos_sata_phy_power_off()
94 	ret = regmap_update_bits(sata_phy->pmureg, SATAPHY_CONTROL_OFFSET,  in exynos_sata_phy_init()
97 		dev_err(&sata_phy->phy->dev, "phy init failed\n");  in exynos_sata_phy_init()
99 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
101 	val = readl(sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
105 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
107 	val = readl(sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
109 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
111 	val = readl(sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
113 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
115 	val = readl(sata_phy->regs + EXYNOS5_SATA_PHSATA_CTRLM);  in exynos_sata_phy_init()
117 	writel(val, sata_phy->regs + EXYNOS5_SATA_PHSATA_CTRLM);  in exynos_sata_phy_init()
120 	val = readl(sata_phy->regs + EXYNOS5_SATA_PHSATA_CTRLM);  in exynos_sata_phy_init()
122 	writel(val, sata_phy->regs + EXYNOS5_SATA_PHSATA_CTRLM);  in exynos_sata_phy_init()
124 	val = readl(sata_phy->regs + EXYNOS5_SATA_CTRL0);  in exynos_sata_phy_init()
126 	writel(val, sata_phy->regs + EXYNOS5_SATA_CTRL0);  in exynos_sata_phy_init()
128 	val = readl(sata_phy->regs + EXYNOS5_SATA_MODE0);  in exynos_sata_phy_init()
130 	writel(val, sata_phy->regs + EXYNOS5_SATA_MODE0);  in exynos_sata_phy_init()
132 	ret = i2c_master_send(sata_phy->client, buf, sizeof(buf));  in exynos_sata_phy_init()
137 	val = readl(sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
139 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
141 	val = readl(sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
143 	writel(val, sata_phy->regs + EXYNOS5_SATA_RESET);  in exynos_sata_phy_init()
145 	ret = wait_for_reg_status(sata_phy->regs,  in exynos_sata_phy_init()
149 		dev_err(&sata_phy->phy->dev,  in exynos_sata_phy_init()
164 	struct device *dev = &pdev->dev;  in exynos_sata_phy_probe()
171 		return -ENOMEM;  in exynos_sata_phy_probe()
173 	sata_phy->regs = devm_platform_ioremap_resource(pdev, 0);  in exynos_sata_phy_probe()
174 	if (IS_ERR(sata_phy->regs))  in exynos_sata_phy_probe()
175 		return PTR_ERR(sata_phy->regs);  in exynos_sata_phy_probe()
177 	sata_phy->pmureg = syscon_regmap_lookup_by_phandle(dev->of_node,  in exynos_sata_phy_probe()
178 					"samsung,syscon-phandle");  in exynos_sata_phy_probe()
179 	if (IS_ERR(sata_phy->pmureg)) {  in exynos_sata_phy_probe()
181 		return PTR_ERR(sata_phy->pmureg);  in exynos_sata_phy_probe()
184 	node = of_parse_phandle(dev->of_node,  in exynos_sata_phy_probe()
185 			"samsung,exynos-sataphy-i2c-phandle", 0);  in exynos_sata_phy_probe()
187 		return -EINVAL;  in exynos_sata_phy_probe()
189 	sata_phy->client = of_find_i2c_device_by_node(node);  in exynos_sata_phy_probe()
191 	if (!sata_phy->client)  in exynos_sata_phy_probe()
192 		return -EPROBE_DEFER;  in exynos_sata_phy_probe()
196 	sata_phy->phyclk = devm_clk_get(dev, "sata_phyctrl");  in exynos_sata_phy_probe()
197 	if (IS_ERR(sata_phy->phyclk)) {  in exynos_sata_phy_probe()
198 		dev_err(dev, "failed to get clk for PHY\n");  in exynos_sata_phy_probe()
199 		ret = PTR_ERR(sata_phy->phyclk);  in exynos_sata_phy_probe()
203 	ret = clk_prepare_enable(sata_phy->phyclk);  in exynos_sata_phy_probe()
205 		dev_err(dev, "failed to enable source clk\n");  in exynos_sata_phy_probe()
209 	sata_phy->phy = devm_phy_create(dev, NULL, &exynos_sata_phy_ops);  in exynos_sata_phy_probe()
210 	if (IS_ERR(sata_phy->phy)) {  in exynos_sata_phy_probe()
212 		ret = PTR_ERR(sata_phy->phy);  in exynos_sata_phy_probe()
216 	phy_set_drvdata(sata_phy->phy, sata_phy);  in exynos_sata_phy_probe()
228 	clk_disable_unprepare(sata_phy->phyclk);  in exynos_sata_phy_probe()
230 	put_device(&sata_phy->client->dev);  in exynos_sata_phy_probe()
236 	{ .compatible = "samsung,exynos5250-sata-phy" },
245 		.name  = "samsung,sata-phy",
251 MODULE_DESCRIPTION("Samsung SerDes PHY driver");