1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <asm/io.h>
#include <clk.h>
#include <dm.h>
#include <dm/device.h>
#include <dm/device_compat.h>
#include <power-domain-uclass.h>
#include <dt-bindings/power/imx8mp-power.h>
#define GPR_REG0 0x0
#define PCIE_CLOCK_MODULE_EN BIT(0)
#define USB_CLOCK_MODULE_EN BIT(1)
struct imx8mp_hsiomix_priv {
void __iomem *base;
struct clk clk_usb;
struct power_domain pd_bus;
struct power_domain pd_usb;
struct power_domain pd_usb_phy1;
struct power_domain pd_usb_phy2;
};
static int imx8mp_hsiomix_on(struct power_domain *power_domain)
{
struct udevice *dev = power_domain->dev;
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
struct power_domain *domain;
int ret;
ret = power_domain_on(&priv->pd_bus);
if (ret)
return ret;
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB) {
domain = &priv->pd_usb;
} else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY1) {
domain = &priv->pd_usb_phy1;
} else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY2) {
domain = &priv->pd_usb_phy2;
} else {
ret = -EINVAL;
goto err_pd;
}
ret = power_domain_on(domain);
if (ret)
goto err_pd;
ret = clk_enable(&priv->clk_usb);
if (ret)
goto err_clk;
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
setbits_le32(priv->base + GPR_REG0, USB_CLOCK_MODULE_EN);
return 0;
err_clk:
power_domain_off(domain);
err_pd:
power_domain_off(&priv->pd_bus);
return ret;
}
static int imx8mp_hsiomix_off(struct power_domain *power_domain)
{
struct udevice *dev = power_domain->dev;
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
clrbits_le32(priv->base + GPR_REG0, USB_CLOCK_MODULE_EN);
clk_disable(&priv->clk_usb);
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
power_domain_off(&priv->pd_usb);
else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY1)
power_domain_off(&priv->pd_usb_phy1);
else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY2)
power_domain_off(&priv->pd_usb_phy2);
power_domain_off(&priv->pd_bus);
return 0;
}
static int imx8mp_hsiomix_of_xlate(struct power_domain *power_domain,
struct ofnode_phandle_args *args)
{
power_domain->id = args->args[0];
return 0;
}
static int imx8mp_hsiomix_probe(struct udevice *dev)
{
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
int ret;
priv->base = dev_read_addr_ptr(dev);
ret = clk_get_by_name(dev, "usb", &priv->clk_usb);
if (ret < 0)
return ret;
ret = power_domain_get_by_name(dev, &priv->pd_bus, "bus");
if (ret < 0)
goto err_pd_bus;
ret = power_domain_get_by_name(dev, &priv->pd_usb, "usb");
if (ret < 0)
goto err_pd_usb;
ret = power_domain_get_by_name(dev, &priv->pd_usb_phy1, "usb-phy1");
if (ret < 0)
goto err_pd_usb_phy1;
ret = power_domain_get_by_name(dev, &priv->pd_usb_phy2, "usb-phy2");
if (ret < 0)
goto err_pd_usb_phy2;
return 0;
err_pd_usb_phy2:
power_domain_free(&priv->pd_usb_phy1);
err_pd_usb_phy1:
power_domain_free(&priv->pd_usb);
err_pd_usb:
power_domain_free(&priv->pd_bus);
err_pd_bus:
clk_free(&priv->clk_usb);
return ret;
}
static const struct udevice_id imx8mp_hsiomix_ids[] = {
{ .compatible = "fsl,imx8mp-hsio-blk-ctrl" },
{ }
};
struct power_domain_ops imx8mp_hsiomix_ops = {
.on = imx8mp_hsiomix_on,
.off = imx8mp_hsiomix_off,
.of_xlate = imx8mp_hsiomix_of_xlate,
};
U_BOOT_DRIVER(imx8mp_hsiomix) = {
.name = "imx8mp_hsiomix",
.id = UCLASS_POWER_DOMAIN,
.of_match = imx8mp_hsiomix_ids,
.probe = imx8mp_hsiomix_probe,
.priv_auto = sizeof(struct imx8mp_hsiomix_priv),
.ops = &imx8mp_hsiomix_ops,
};
|
