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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / d08a194871fdf91b2ccdbaf02e35ed9443e0e170 / . / drivers / power / domain / imx8m-power-domain.c
blob: 164fb3d31dd9e74a89032ca28de70eab31936196 [file] [log] [blame]
Patrick Wildtd08a1942019-10-03 15:51:50 +0200[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2017 NXP
4 */
5
6#include <common.h>
7#include <dm.h>
8#include <power-domain-uclass.h>
9#include <asm/io.h>
10#include <asm/arch/power-domain.h>
11#include <asm/mach-imx/sys_proto.h>
12#include <dm/device-internal.h>
13#include <dm/device.h>
14#include <imx_sip.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18static int imx8m_power_domain_request(struct power_domain *power_domain)
19{
20 return 0;
21}
22
23static int imx8m_power_domain_free(struct power_domain *power_domain)
24{
25 return 0;
26}
27
28static int imx8m_power_domain_on(struct power_domain *power_domain)
29{
30 struct udevice *dev = power_domain->dev;
31 struct imx8m_power_domain_platdata *pdata;
32 pdata = dev_get_platdata(dev);
33
34 if (pdata->resource_id < 0)
35 return -EINVAL;
36
37 if (pdata->has_pd)
38 power_domain_on(&pdata->pd);
39
40 call_imx_sip(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN, pdata->resource_id, 1);
41
42 return 0;
43}
44
45static int imx8m_power_domain_off(struct power_domain *power_domain)
46{
47 struct udevice *dev = power_domain->dev;
48 struct imx8m_power_domain_platdata *pdata;
49 pdata = dev_get_platdata(dev);
50
51 if (pdata->resource_id < 0)
52 return -EINVAL;
53
54 call_imx_sip(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN, pdata->resource_id, 0);
55
56 if (pdata->has_pd)
57 power_domain_off(&pdata->pd);
58
59 return 0;
60}
61
62static int imx8m_power_domain_of_xlate(struct power_domain *power_domain,
63 struct ofnode_phandle_args *args)
64{
65 return 0;
66}
67
68static int imx8m_power_domain_bind(struct udevice *dev)
69{
70 int offset;
71 const char *name;
72 int ret = 0;
73
74 offset = dev_of_offset(dev);
75 for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
76 offset = fdt_next_subnode(gd->fdt_blob, offset)) {
77 /* Bind the subnode to this driver */
78 name = fdt_get_name(gd->fdt_blob, offset, NULL);
79
80 ret = device_bind_with_driver_data(dev, dev->driver, name,
81 dev->driver_data,
82 offset_to_ofnode(offset),
83 NULL);
84
85 if (ret == -ENODEV)
86 printf("Driver '%s' refuses to bind\n",
87 dev->driver->name);
88
89 if (ret)
90 printf("Error binding driver '%s': %d\n",
91 dev->driver->name, ret);
92 }
93
94 return 0;
95}
96
97static int imx8m_power_domain_probe(struct udevice *dev)
98{
99 return 0;
100}
101
102static int imx8m_power_domain_ofdata_to_platdata(struct udevice *dev)
103{
104 struct imx8m_power_domain_platdata *pdata = dev_get_platdata(dev);
105
106 pdata->resource_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
107 "reg", -1);
108
109 if (!power_domain_get(dev, &pdata->pd))
110 pdata->has_pd = 1;
111
112 return 0;
113}
114
115static const struct udevice_id imx8m_power_domain_ids[] = {
116 { .compatible = "fsl,imx8mq-gpc" },
117 { }
118};
119
120struct power_domain_ops imx8m_power_domain_ops = {
121 .request = imx8m_power_domain_request,
122 .free = imx8m_power_domain_free,
123 .on = imx8m_power_domain_on,
124 .off = imx8m_power_domain_off,
125 .of_xlate = imx8m_power_domain_of_xlate,
126};
127
128U_BOOT_DRIVER(imx8m_power_domain) = {
129 .name = "imx8m_power_domain",
130 .id = UCLASS_POWER_DOMAIN,
131 .of_match = imx8m_power_domain_ids,
132 .bind = imx8m_power_domain_bind,
133 .probe = imx8m_power_domain_probe,
134 .ofdata_to_platdata = imx8m_power_domain_ofdata_to_platdata,
135 .platdata_auto_alloc_size = sizeof(struct imx8m_power_domain_platdata),
136 .ops = &imx8m_power_domain_ops,
137};