1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2017 NXP
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <malloc.h>
9 #include <power-domain-uclass.h>
10 #include <asm/global_data.h>
11 #include <asm/io.h>
12 #include <asm/arch/power-domain.h>
13 #include <asm/mach-imx/sys_proto.h>
14 #include <dm/device-internal.h>
15 #include <dm/device.h>
16 #include <imx_sip.h>
17 #include <linux/arm-smccc.h>
18
19 DECLARE_GLOBAL_DATA_PTR;
20
imx8m_power_domain_request(struct power_domain * power_domain)21 static int imx8m_power_domain_request(struct power_domain *power_domain)
22 {
23 return 0;
24 }
25
imx8m_power_domain_free(struct power_domain * power_domain)26 static int imx8m_power_domain_free(struct power_domain *power_domain)
27 {
28 return 0;
29 }
30
imx8m_power_domain_on(struct power_domain * power_domain)31 static int imx8m_power_domain_on(struct power_domain *power_domain)
32 {
33 struct udevice *dev = power_domain->dev;
34 struct imx8m_power_domain_plat *pdata;
35
36 pdata = dev_get_plat(dev);
37
38 if (pdata->resource_id < 0)
39 return -EINVAL;
40
41 if (pdata->has_pd)
42 power_domain_on(&pdata->pd);
43
44 arm_smccc_smc(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN,
45 pdata->resource_id, 1, 0, 0, 0, 0, NULL);
46
47 return 0;
48 }
49
imx8m_power_domain_off(struct power_domain * power_domain)50 static int imx8m_power_domain_off(struct power_domain *power_domain)
51 {
52 struct udevice *dev = power_domain->dev;
53 struct imx8m_power_domain_plat *pdata;
54 pdata = dev_get_plat(dev);
55
56 if (pdata->resource_id < 0)
57 return -EINVAL;
58
59 arm_smccc_smc(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN,
60 pdata->resource_id, 0, 0, 0, 0, 0, NULL);
61
62 if (pdata->has_pd)
63 power_domain_off(&pdata->pd);
64
65 return 0;
66 }
67
imx8m_power_domain_of_xlate(struct power_domain * power_domain,struct ofnode_phandle_args * args)68 static int imx8m_power_domain_of_xlate(struct power_domain *power_domain,
69 struct ofnode_phandle_args *args)
70 {
71 return 0;
72 }
73
imx8m_power_domain_bind(struct udevice * dev)74 static int imx8m_power_domain_bind(struct udevice *dev)
75 {
76 int offset;
77 const char *name;
78 int ret = 0;
79
80 offset = dev_of_offset(dev);
81 for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
82 offset = fdt_next_subnode(gd->fdt_blob, offset)) {
83 /* Bind the subnode to this driver */
84 name = fdt_get_name(gd->fdt_blob, offset, NULL);
85
86 ret = device_bind_with_driver_data(dev, dev->driver, name,
87 dev->driver_data,
88 offset_to_ofnode(offset),
89 NULL);
90
91 if (ret == -ENODEV)
92 printf("Driver '%s' refuses to bind\n",
93 dev->driver->name);
94
95 if (ret)
96 printf("Error binding driver '%s': %d\n",
97 dev->driver->name, ret);
98 }
99
100 return 0;
101 }
102
imx8m_power_domain_probe(struct udevice * dev)103 static int imx8m_power_domain_probe(struct udevice *dev)
104 {
105 return 0;
106 }
107
imx8m_power_domain_of_to_plat(struct udevice * dev)108 static int imx8m_power_domain_of_to_plat(struct udevice *dev)
109 {
110 struct imx8m_power_domain_plat *pdata = dev_get_plat(dev);
111
112 pdata->resource_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
113 "reg", -1);
114
115 if (!power_domain_get(dev, &pdata->pd))
116 pdata->has_pd = 1;
117
118 return 0;
119 }
120
121 static const struct udevice_id imx8m_power_domain_ids[] = {
122 { .compatible = "fsl,imx8mq-gpc" },
123 { .compatible = "fsl,imx8mm-gpc" },
124 { .compatible = "fsl,imx8mn-gpc" },
125 { }
126 };
127
128 struct power_domain_ops imx8m_power_domain_ops = {
129 .request = imx8m_power_domain_request,
130 .rfree = imx8m_power_domain_free,
131 .on = imx8m_power_domain_on,
132 .off = imx8m_power_domain_off,
133 .of_xlate = imx8m_power_domain_of_xlate,
134 };
135
136 U_BOOT_DRIVER(imx8m_power_domain) = {
137 .name = "imx8m_power_domain",
138 .id = UCLASS_POWER_DOMAIN,
139 .of_match = imx8m_power_domain_ids,
140 .bind = imx8m_power_domain_bind,
141 .probe = imx8m_power_domain_probe,
142 .of_to_plat = imx8m_power_domain_of_to_plat,
143 .plat_auto = sizeof(struct imx8m_power_domain_plat),
144 .ops = &imx8m_power_domain_ops,
145 };
146