phy/allwinner/phy-sun9i-usb.c

3  * Allwinner sun9i USB phy driver
7  * Based on phy-sun4i-usb.c from
18 #include <linux/phy/phy.h>
36 	struct phy *phy;
44 static void sun9i_usb_phy_passby(struct sun9i_usb_phy *phy, int enable)
52 	if (phy->type == USBPHY_INTERFACE_MODE_HSIC)
56 	reg_value = readl(phy->pmu);
63 	writel(reg_value, phy->pmu);
66 static int sun9i_usb_phy_init(struct phy *_phy)
68 	struct sun9i_usb_phy *phy = phy_get_drvdata(_phy);
71 	ret = clk_prepare_enable(phy->clk);
75 	ret = clk_prepare_enable(phy->hsic_clk);
79 	ret = reset_control_deassert(phy->reset);
83 	sun9i_usb_phy_passby(phy, 1);
87 	clk_disable_unprepare(phy->hsic_clk);
90 	clk_disable_unprepare(phy->clk);
96 static int sun9i_usb_phy_exit(struct phy *_phy)
98 	struct sun9i_usb_phy *phy = phy_get_drvdata(_phy);
100 	sun9i_usb_phy_passby(phy, 0);
101 	reset_control_assert(phy->reset);
102 	clk_disable_unprepare(phy->hsic_clk);
103 	clk_disable_unprepare(phy->clk);
116 	struct sun9i_usb_phy *phy;
121 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
122 	if (!phy)
125 	phy->type = of_usb_get_phy_mode(np);
126 	if (phy->type == USBPHY_INTERFACE_MODE_HSIC) {
127 		phy->clk = devm_clk_get(dev, "hsic_480M");
128 		if (IS_ERR(phy->clk)) {
130 			return PTR_ERR(phy->clk);
133 		phy->hsic_clk = devm_clk_get(dev, "hsic_12M");
134 		if (IS_ERR(phy->hsic_clk)) {
136 			return PTR_ERR(phy->hsic_clk);
139 		phy->reset = devm_reset_control_get(dev, "hsic");
140 		if (IS_ERR(phy->reset)) {
142 			return PTR_ERR(phy->reset);
145 		phy->clk = devm_clk_get(dev, "phy");
146 		if (IS_ERR(phy->clk)) {
147 			dev_err(dev, "failed to get phy clock\n");
148 			return PTR_ERR(phy->clk);
151 		phy->reset = devm_reset_control_get(dev, "phy");
152 		if (IS_ERR(phy->reset)) {
154 			return PTR_ERR(phy->reset);
158 	phy->pmu = devm_platform_ioremap_resource(pdev, 0);
159 	if (IS_ERR(phy->pmu))
160 		return PTR_ERR(phy->pmu);
162 	phy->phy = devm_phy_create(dev, NULL, &sun9i_usb_phy_ops);
163 	if (IS_ERR(phy->phy)) {
164 		dev_err(dev, "failed to create PHY\n");
165 		return PTR_ERR(phy->phy);
168 	phy_set_drvdata(phy->phy, phy);
175 	{ .compatible = "allwinner,sun9i-a80-usb-phy" },
184 		.name  = "sun9i-usb-phy",
189 MODULE_DESCRIPTION("Allwinner sun9i USB phy driver");