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);
50 	if (!IS_ERR(nop->clk)) {
52 			clk_disable_unprepare(nop->clk);
54 			clk_prepare_enable(nop->clk);
60 static void nop_reset(struct usb_phy_generic *nop)
62 	if (!nop->gpiod_reset)
65 	gpiod_set_value_cansleep(nop->gpiod_reset, 1);
67 	gpiod_set_value_cansleep(nop->gpiod_reset, 0);
71 static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA)
73 	struct regulator *vbus_draw = nop->vbus_draw;
80 	enabled = nop->vbus_draw_enabled;
87 			nop->vbus_draw_enabled = 1;
94 			nop->vbus_draw_enabled = 0;
97 	nop->mA = mA;
103 	struct usb_phy_generic *nop = data;
104 	struct usb_otg *otg = nop->phy.otg;
107 	vbus = gpiod_get_value(nop->gpiod_vbus);
108 	if ((vbus ^ nop->vbus) == 0)
110 	nop->vbus = vbus;
115 		nop->phy.last_event = status;
118 		nop_set_vbus_draw(nop, 100);
120 		atomic_notifier_call_chain(&nop->phy.notifier, status,
123 		nop_set_vbus_draw(nop, 0);
127 		nop->phy.last_event = status;
129 		atomic_notifier_call_chain(&nop->phy.notifier, status,
137 	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
140 	if (!IS_ERR(nop->vcc)) {
141 		if (regulator_enable(nop->vcc))
145 	if (!IS_ERR(nop->clk)) {
146 		ret = clk_prepare_enable(nop->clk);
151 	nop_reset(nop);
159 	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
161 	gpiod_set_value_cansleep(nop->gpiod_reset, 1);
163 	if (!IS_ERR(nop->clk))
164 		clk_disable_unprepare(nop->clk);
166 	if (!IS_ERR(nop->vcc)) {
167 		if (regulator_disable(nop->vcc))
206 int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop)
222 	nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
224 	err = PTR_ERR_OR_ZERO(nop->gpiod_reset);
226 		nop->gpiod_vbus = devm_gpiod_get_optional(dev,
229 		err = PTR_ERR_OR_ZERO(nop->gpiod_vbus);
235 	if (nop->gpiod_reset)
236 		gpiod_direction_output(nop->gpiod_reset, 1);
238 	nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
240 	if (!nop->phy.otg)
243 	nop->clk = devm_clk_get(dev, "main_clk");
244 	if (IS_ERR(nop->clk)) {
246 					PTR_ERR(nop->clk));
248 			return PTR_ERR(nop->clk);
251 	if (!IS_ERR(nop->clk) && clk_rate) {
252 		err = clk_set_rate(nop->clk, clk_rate);
259 	nop->vcc = devm_regulator_get_optional(dev, "vcc");
260 	if (IS_ERR(nop->vcc) && PTR_ERR(nop->vcc) != -ENODEV)
261 		return dev_err_probe(dev, PTR_ERR(nop->vcc),
264 	nop->vbus_draw = devm_regulator_get_exclusive(dev, "vbus");
265 	if (PTR_ERR(nop->vbus_draw) == -ENODEV)
266 		nop->vbus_draw = NULL;
267 	if (IS_ERR(nop->vbus_draw))
268 		return dev_err_probe(dev, PTR_ERR(nop->vbus_draw),
271 	nop->dev		= dev;
272 	nop->phy.dev		= nop->dev;
273 	nop->phy.label		= "nop-xceiv";
274 	nop->phy.set_suspend	= nop_set_suspend;
275 	nop->phy.type		= type;
277 	nop->phy.otg->state		= OTG_STATE_UNDEFINED;
278 	nop->phy.otg->usb_phy		= &nop->phy;
279 	nop->phy.otg->set_host		= nop_set_host;
280 	nop->phy.otg->set_peripheral	= nop_set_peripheral;
290 	struct usb_phy_generic	*nop;
293 	nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL);
294 	if (!nop)
297 	err = usb_phy_gen_create_phy(dev, nop);
300 	if (nop->gpiod_vbus) {
302 						gpiod_to_irq(nop->gpiod_vbus),
305 						nop);
308 				gpiod_to_irq(nop->gpiod_vbus), err);
311 		nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ?
315 	nop->phy.init		= usb_gen_phy_init;
316 	nop->phy.shutdown	= usb_gen_phy_shutdown;
318 	err = usb_add_phy_dev(&nop->phy);
325 	platform_set_drvdata(pdev, nop);
335 	struct usb_phy_generic *nop = platform_get_drvdata(pdev);
337 	usb_remove_phy(&nop->phy);
341 	{ .compatible = "usb-nop-xceiv" },