1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * dwc3-of-simple.c - OF glue layer for simple integrations
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Author: Felipe Balbi <balbi@ti.com>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (C) 2018 BayLibre, SAS
9*4882a593Smuzhiyun * Author: Neil Armstrong <narmstron@baylibre.com>
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <common.h>
15*4882a593Smuzhiyun #include <dm.h>
16*4882a593Smuzhiyun #include <reset.h>
17*4882a593Smuzhiyun #include <clk.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct dwc3_of_simple {
22*4882a593Smuzhiyun struct clk_bulk clks;
23*4882a593Smuzhiyun struct reset_ctl_bulk resets;
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
dwc3_of_simple_reset_init(struct udevice * dev,struct dwc3_of_simple * simple)26*4882a593Smuzhiyun static int dwc3_of_simple_reset_init(struct udevice *dev,
27*4882a593Smuzhiyun struct dwc3_of_simple *simple)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun int ret;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun ret = reset_get_bulk(dev, &simple->resets);
32*4882a593Smuzhiyun if (ret == -ENOTSUPP)
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun else if (ret)
35*4882a593Smuzhiyun return ret;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun ret = reset_deassert_bulk(&simple->resets);
38*4882a593Smuzhiyun if (ret) {
39*4882a593Smuzhiyun reset_release_bulk(&simple->resets);
40*4882a593Smuzhiyun return ret;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun return 0;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
dwc3_of_simple_clk_init(struct udevice * dev,struct dwc3_of_simple * simple)46*4882a593Smuzhiyun static int dwc3_of_simple_clk_init(struct udevice *dev,
47*4882a593Smuzhiyun struct dwc3_of_simple *simple)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun int ret;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun ret = clk_get_bulk(dev, &simple->clks);
52*4882a593Smuzhiyun if (ret == -ENOSYS)
53*4882a593Smuzhiyun return 0;
54*4882a593Smuzhiyun if (ret)
55*4882a593Smuzhiyun return ret;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #if CONFIG_IS_ENABLED(CLK)
58*4882a593Smuzhiyun ret = clk_enable_bulk(&simple->clks);
59*4882a593Smuzhiyun if (ret) {
60*4882a593Smuzhiyun clk_release_bulk(&simple->clks);
61*4882a593Smuzhiyun return ret;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun #endif
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun return 0;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
dwc3_of_simple_probe(struct udevice * dev)68*4882a593Smuzhiyun static int dwc3_of_simple_probe(struct udevice *dev)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun struct dwc3_of_simple *simple = dev_get_platdata(dev);
71*4882a593Smuzhiyun int ret;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun ret = dwc3_of_simple_clk_init(dev, simple);
74*4882a593Smuzhiyun if (ret)
75*4882a593Smuzhiyun return ret;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun ret = dwc3_of_simple_reset_init(dev, simple);
78*4882a593Smuzhiyun if (ret)
79*4882a593Smuzhiyun return ret;
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun return 0;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
dwc3_of_simple_remove(struct udevice * dev)84*4882a593Smuzhiyun static int dwc3_of_simple_remove(struct udevice *dev)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun struct dwc3_of_simple *simple = dev_get_platdata(dev);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun reset_release_bulk(&simple->resets);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun clk_release_bulk(&simple->clks);
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun return dm_scan_fdt_dev(dev);
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun static const struct udevice_id dwc3_of_simple_ids[] = {
96*4882a593Smuzhiyun { .compatible = "amlogic,meson-gxl-dwc3" },
97*4882a593Smuzhiyun { .compatible = "ti,dwc3" },
98*4882a593Smuzhiyun { }
99*4882a593Smuzhiyun };
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun U_BOOT_DRIVER(dwc3_of_simple) = {
102*4882a593Smuzhiyun .name = "dwc3-of-simple",
103*4882a593Smuzhiyun .id = UCLASS_SIMPLE_BUS,
104*4882a593Smuzhiyun .of_match = dwc3_of_simple_ids,
105*4882a593Smuzhiyun .probe = dwc3_of_simple_probe,
106*4882a593Smuzhiyun .remove = dwc3_of_simple_remove,
107*4882a593Smuzhiyun .platdata_auto_alloc_size = sizeof(struct dwc3_of_simple),
108*4882a593Smuzhiyun .flags = DM_FLAG_ALLOC_PRIV_DMA,
109*4882a593Smuzhiyun };
110