usb/phy/phy-generic.c

10  *	This provides a "nop" transceiver for PHYs which are
48 	struct usb_phy_generic *nop = dev_get_drvdata(x->dev);
52 		if (!IS_ERR(nop->clk))
53 			clk_disable_unprepare(nop->clk);
54 		if (!IS_ERR(nop->vcc) && !device_may_wakeup(x->dev))
55 			ret = regulator_disable(nop->vcc);
57 		if (!IS_ERR(nop->vcc) && !device_may_wakeup(x->dev))
58 			ret = regulator_enable(nop->vcc);
59 		if (!IS_ERR(nop->clk))
60 			clk_prepare_enable(nop->clk);
66 static void nop_reset(struct usb_phy_generic *nop)
68 	if (!nop->gpiod_reset)
71 	gpiod_set_value_cansleep(nop->gpiod_reset, 1);
73 	gpiod_set_value_cansleep(nop->gpiod_reset, 0);
80 	struct usb_phy_generic *nop = dev_get_drvdata(otg->usb_phy->dev);
82 	if (!nop->vbus_draw)
85 	if (enable && !nop->vbus_draw_enabled) {
86 		ret = regulator_enable(nop->vbus_draw);
88 			nop->vbus_draw_enabled = false;
90 			nop->vbus_draw_enabled = true;
92 	} else if (!enable && nop->vbus_draw_enabled) {
93 		ret = regulator_disable(nop->vbus_draw);
94 		nop->vbus_draw_enabled = false;
102 	struct usb_phy_generic *nop = data;
103 	struct usb_otg *otg = nop->phy.otg;
106 	vbus = gpiod_get_value(nop->gpiod_vbus);
107 	if ((vbus ^ nop->vbus) == 0)
109 	nop->vbus = vbus;
114 		nop->phy.last_event = status;
116 		atomic_notifier_call_chain(&nop->phy.notifier, status,
121 		nop->phy.last_event = status;
123 		atomic_notifier_call_chain(&nop->phy.notifier, status,
131 	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
134 	if (!IS_ERR(nop->vcc)) {
135 		if (regulator_enable(nop->vcc))
139 	if (!IS_ERR(nop->clk)) {
140 		ret = clk_prepare_enable(nop->clk);
145 	nop_reset(nop);
153 	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
155 	gpiod_set_value_cansleep(nop->gpiod_reset, 1);
157 	if (!IS_ERR(nop->clk))
158 		clk_disable_unprepare(nop->clk);
160 	if (!IS_ERR(nop->vcc)) {
161 		if (regulator_disable(nop->vcc))
200 int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop)
216 	nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
218 	err = PTR_ERR_OR_ZERO(nop->gpiod_reset);
220 		nop->gpiod_vbus = devm_gpiod_get_optional(dev,
223 		err = PTR_ERR_OR_ZERO(nop->gpiod_vbus);
229 	if (nop->gpiod_reset)
230 		gpiod_direction_output(nop->gpiod_reset, 1);
232 	nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
234 	if (!nop->phy.otg)
237 	nop->clk = devm_clk_get(dev, "main_clk");
238 	if (IS_ERR(nop->clk)) {
240 					PTR_ERR(nop->clk));
242 			return PTR_ERR(nop->clk);
245 	if (!IS_ERR(nop->clk) && clk_rate) {
246 		err = clk_set_rate(nop->clk, clk_rate);
253 	nop->vcc = devm_regulator_get_optional(dev, "vcc");
254 	if (IS_ERR(nop->vcc) && PTR_ERR(nop->vcc) != -ENODEV)
255 		return dev_err_probe(dev, PTR_ERR(nop->vcc),
258 	nop->vbus_draw = devm_regulator_get_exclusive(dev, "vbus");
259 	if (PTR_ERR(nop->vbus_draw) == -ENODEV)
260 		nop->vbus_draw = NULL;
261 	if (IS_ERR(nop->vbus_draw))
262 		return dev_err_probe(dev, PTR_ERR(nop->vbus_draw),
265 	nop->dev		= dev;
266 	nop->phy.dev		= nop->dev;
267 	nop->phy.label		= "nop-xceiv";
268 	nop->phy.set_suspend	= nop_set_suspend;
269 	nop->phy.type		= type;
271 	nop->phy.otg->state		= OTG_STATE_UNDEFINED;
272 	nop->phy.otg->usb_phy		= &nop->phy;
273 	nop->phy.otg->set_host		= nop_set_host;
274 	nop->phy.otg->set_peripheral	= nop_set_peripheral;
275 	nop->phy.otg->set_vbus          = nop_set_vbus;
285 	struct usb_phy_generic	*nop;
288 	nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL);
289 	if (!nop)
292 	err = usb_phy_gen_create_phy(dev, nop);
295 	if (nop->gpiod_vbus) {
297 						gpiod_to_irq(nop->gpiod_vbus),
300 						nop);
303 				gpiod_to_irq(nop->gpiod_vbus), err);
306 		nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ?
310 	nop->phy.init		= usb_gen_phy_init;
311 	nop->phy.shutdown	= usb_gen_phy_shutdown;
313 	err = usb_add_phy_dev(&nop->phy);
320 	platform_set_drvdata(pdev, nop);
330 	struct usb_phy_generic *nop = platform_get_drvdata(pdev);
332 	usb_remove_phy(&nop->phy);
334 	if (nop->vbus_draw && nop->vbus_draw_enabled)
335 		regulator_disable(nop->vbus_draw);
339 	{ .compatible = "usb-nop-xceiv" },