1 // SPDX-License-Identifier: GPL-2.0
3 // reset-uniphier-usb3.c - USB3 reset driver for UniPhier
13 #include "reset-simple.h"
34 	struct device *dev = &pdev->dev;  in uniphier_usb3_reset_probe()
42 	if (!priv)  in uniphier_usb3_reset_probe()
43 		return -ENOMEM;  in uniphier_usb3_reset_probe()
45 	priv->data = of_device_get_match_data(dev);  in uniphier_usb3_reset_probe()
46 	if (WARN_ON(!priv->data || priv->data->nclks > MAX_CLKS ||  in uniphier_usb3_reset_probe()
47 		    priv->data->nrsts > MAX_RSTS))  in uniphier_usb3_reset_probe()
48 		return -EINVAL;  in uniphier_usb3_reset_probe()
52 	priv->rdata.membase = devm_ioremap_resource(dev, res);  in uniphier_usb3_reset_probe()
53 	if (IS_ERR(priv->rdata.membase))  in uniphier_usb3_reset_probe()
54 		return PTR_ERR(priv->rdata.membase);  in uniphier_usb3_reset_probe()
56 	for (i = 0; i < priv->data->nclks; i++)  in uniphier_usb3_reset_probe()
57 		priv->clk[i].id = priv->data->clock_names[i];  in uniphier_usb3_reset_probe()
58 	ret = devm_clk_bulk_get(dev, priv->data->nclks, priv->clk);  in uniphier_usb3_reset_probe()
59 	if (ret)  in uniphier_usb3_reset_probe()
62 	for (i = 0; i < priv->data->nrsts; i++) {  in uniphier_usb3_reset_probe()
63 		name = priv->data->reset_names[i];  in uniphier_usb3_reset_probe()
64 		priv->rst[i] = devm_reset_control_get_shared(dev, name);  in uniphier_usb3_reset_probe()
65 		if (IS_ERR(priv->rst[i]))  in uniphier_usb3_reset_probe()
66 			return PTR_ERR(priv->rst[i]);  in uniphier_usb3_reset_probe()
69 	ret = clk_bulk_prepare_enable(priv->data->nclks, priv->clk);  in uniphier_usb3_reset_probe()
70 	if (ret)  in uniphier_usb3_reset_probe()
73 	for (nr = 0; nr < priv->data->nrsts; nr++) {  in uniphier_usb3_reset_probe()
74 		ret = reset_control_deassert(priv->rst[nr]);  in uniphier_usb3_reset_probe()
75 		if (ret)  in uniphier_usb3_reset_probe()
79 	spin_lock_init(&priv->rdata.lock);  in uniphier_usb3_reset_probe()
80 	priv->rdata.rcdev.owner = THIS_MODULE;  in uniphier_usb3_reset_probe()
81 	priv->rdata.rcdev.nr_resets = size * BITS_PER_BYTE;  in uniphier_usb3_reset_probe()
82 	priv->rdata.rcdev.ops = &reset_simple_ops;  in uniphier_usb3_reset_probe()
83 	priv->rdata.rcdev.of_node = dev->of_node;  in uniphier_usb3_reset_probe()
84 	priv->rdata.active_low = true;  in uniphier_usb3_reset_probe()
88 	ret = devm_reset_controller_register(dev, &priv->rdata.rcdev);  in uniphier_usb3_reset_probe()
89 	if (ret)  in uniphier_usb3_reset_probe()
95 	while (nr--)  in uniphier_usb3_reset_probe()
96 		reset_control_assert(priv->rst[nr]);  in uniphier_usb3_reset_probe()
98 	clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);  in uniphier_usb3_reset_probe()
108 	for (i = 0; i < priv->data->nrsts; i++)  in uniphier_usb3_reset_remove()
109 		reset_control_assert(priv->rst[i]);  in uniphier_usb3_reset_remove()
111 	clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);  in uniphier_usb3_reset_remove()
140 		.compatible = "socionext,uniphier-pro4-usb3-reset",
144 		.compatible = "socionext,uniphier-pxs2-usb3-reset",
148 		.compatible = "socionext,uniphier-ld20-usb3-reset",
152 		.compatible = "socionext,uniphier-pxs3-usb3-reset",
163 		.name = "uniphier-usb3-reset",
170 MODULE_DESCRIPTION("UniPhier USB3 Reset Driver");