1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2017
4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
5 */
6
7 #define LOG_CATEGORY UCLASS_SYSINFO
8
9 #include <common.h>
10 #include <dm.h>
11 #include <sysinfo.h>
12
13 struct sysinfo_priv {
14 bool detected;
15 };
16
sysinfo_get(struct udevice ** devp)17 int sysinfo_get(struct udevice **devp)
18 {
19 int ret = uclass_first_device_err(UCLASS_SYSINFO, devp);
20
21 /*
22 * There is some very dodgy error handling in gazerbeam,
23 * do not return a device on error.
24 */
25 if (ret)
26 *devp = NULL;
27 return ret;
28 }
29
sysinfo_detect(struct udevice * dev)30 int sysinfo_detect(struct udevice *dev)
31 {
32 int ret;
33 struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
34 struct sysinfo_ops *ops = sysinfo_get_ops(dev);
35
36 if (!ops->detect)
37 return -ENOSYS;
38
39 ret = ops->detect(dev);
40 if (!ret)
41 priv->detected = true;
42
43 return ret;
44 }
45
sysinfo_get_fit_loadable(struct udevice * dev,int index,const char * type,const char ** strp)46 int sysinfo_get_fit_loadable(struct udevice *dev, int index, const char *type,
47 const char **strp)
48 {
49 struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
50 struct sysinfo_ops *ops = sysinfo_get_ops(dev);
51
52 if (!priv->detected)
53 return -EPERM;
54
55 if (!ops->get_fit_loadable)
56 return -ENOSYS;
57
58 return ops->get_fit_loadable(dev, index, type, strp);
59 }
60
sysinfo_get_bool(struct udevice * dev,int id,bool * val)61 int sysinfo_get_bool(struct udevice *dev, int id, bool *val)
62 {
63 struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
64 struct sysinfo_ops *ops = sysinfo_get_ops(dev);
65
66 if (!priv->detected)
67 return -EPERM;
68
69 if (!ops->get_bool)
70 return -ENOSYS;
71
72 return ops->get_bool(dev, id, val);
73 }
74
sysinfo_get_int(struct udevice * dev,int id,int * val)75 int sysinfo_get_int(struct udevice *dev, int id, int *val)
76 {
77 struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
78 struct sysinfo_ops *ops = sysinfo_get_ops(dev);
79
80 if (!priv->detected)
81 return -EPERM;
82
83 if (!ops->get_int)
84 return -ENOSYS;
85
86 return ops->get_int(dev, id, val);
87 }
88
sysinfo_get_str(struct udevice * dev,int id,size_t size,char * val)89 int sysinfo_get_str(struct udevice *dev, int id, size_t size, char *val)
90 {
91 struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
92 struct sysinfo_ops *ops = sysinfo_get_ops(dev);
93
94 if (!priv->detected)
95 return -EPERM;
96
97 if (!ops->get_str)
98 return -ENOSYS;
99
100 return ops->get_str(dev, id, size, val);
101 }
102
103 UCLASS_DRIVER(sysinfo) = {
104 .id = UCLASS_SYSINFO,
105 .name = "sysinfo",
106 .post_bind = dm_scan_fdt_dev,
107 .per_device_auto = sizeof(bool),
108 };
109