phy/st/phy-spear1340-miphy.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * ST spear1340-miphy driver
12 #include <linux/dma-mapping.h>
17 #include <linux/phy/phy.h>
32 /* PCIE - SATA configuration registers */
80 	/* phy mode: 0 for SATA 1 for PCIe */
81 	enum spear1340_miphy_mode	mode;  member
84 	/* phy struct pointer */
85 	struct phy			*phy;  member
90 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_sata_init()
93 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_sata_init()
97 	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,  in spear1340_miphy_sata_init()
104 	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,  in spear1340_miphy_sata_init()
106 	/* Wait for SATA reset de-assert completion */  in spear1340_miphy_sata_init()
114 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_sata_exit()
116 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_sata_exit()
120 	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,  in spear1340_miphy_sata_exit()
126 	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,  in spear1340_miphy_sata_exit()
136 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_pcie_init()
139 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_pcie_init()
148 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_pcie_exit()
150 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_pcie_exit()
156 static int spear1340_miphy_init(struct phy *phy)  in spear1340_miphy_init()  argument
158 	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);  in spear1340_miphy_init()
161 	if (priv->mode == SATA)  in spear1340_miphy_init()
163 	else if (priv->mode == PCIE)  in spear1340_miphy_init()
169 static int spear1340_miphy_exit(struct phy *phy)  in spear1340_miphy_exit()  argument
171 	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);  in spear1340_miphy_exit()
174 	if (priv->mode == SATA)  in spear1340_miphy_exit()
176 	else if (priv->mode == PCIE)  in spear1340_miphy_exit()
183 	{ .compatible = "st,spear1340-miphy" },
200 	if (priv->mode == SATA)  in spear1340_miphy_suspend()
211 	if (priv->mode == SATA)  in spear1340_miphy_resume()
221 static struct phy *spear1340_miphy_xlate(struct device *dev,  in spear1340_miphy_xlate()
226 	if (args->args_count < 1) {  in spear1340_miphy_xlate()
228 		return ERR_PTR(-ENODEV);  in spear1340_miphy_xlate()
231 	priv->mode = args->args[0];  in spear1340_miphy_xlate()
233 	if (priv->mode != SATA && priv->mode != PCIE) {  in spear1340_miphy_xlate()
234 		dev_err(dev, "DT did not pass correct phy mode\n");  in spear1340_miphy_xlate()
235 		return ERR_PTR(-ENODEV);  in spear1340_miphy_xlate()
238 	return priv->phy;  in spear1340_miphy_xlate()
243 	struct device *dev = &pdev->dev;  in spear1340_miphy_probe()
249 		return -ENOMEM;  in spear1340_miphy_probe()
251 	priv->misc =  in spear1340_miphy_probe()
252 		syscon_regmap_lookup_by_phandle(dev->of_node, "misc");  in spear1340_miphy_probe()
253 	if (IS_ERR(priv->misc)) {  in spear1340_miphy_probe()
255 		return PTR_ERR(priv->misc);  in spear1340_miphy_probe()
258 	priv->phy = devm_phy_create(dev, NULL, &spear1340_miphy_ops);  in spear1340_miphy_probe()
259 	if (IS_ERR(priv->phy)) {  in spear1340_miphy_probe()
260 		dev_err(dev, "failed to create SATA PCIe PHY\n");  in spear1340_miphy_probe()
261 		return PTR_ERR(priv->phy);  in spear1340_miphy_probe()
265 	phy_set_drvdata(priv->phy, priv);  in spear1340_miphy_probe()
270 		dev_err(dev, "failed to register phy provider\n");  in spear1340_miphy_probe()
280 		.name = "spear1340-miphy",
288 MODULE_DESCRIPTION("ST SPEAR1340-MIPHY driver");