1 // SPDX-License-Identifier: GPL-2.0+
2
3 /*
4 * Add an IPMI platform device.
5 */
6
7 #include <linux/platform_device.h>
8 #include "ipmi_plat_data.h"
9 #include "ipmi_si.h"
10
ipmi_platform_add(const char * name,unsigned int inst,struct ipmi_plat_data * p)11 struct platform_device *ipmi_platform_add(const char *name, unsigned int inst,
12 struct ipmi_plat_data *p)
13 {
14 struct platform_device *pdev;
15 unsigned int num_r = 1, size = 0, pidx = 0;
16 struct resource r[4];
17 struct property_entry pr[6];
18 u32 flags;
19 int rv;
20
21 memset(pr, 0, sizeof(pr));
22 memset(r, 0, sizeof(r));
23
24 if (p->iftype == IPMI_PLAT_IF_SI) {
25 if (p->type == SI_BT)
26 size = 3;
27 else if (p->type != SI_TYPE_INVALID)
28 size = 2;
29
30 if (p->regsize == 0)
31 p->regsize = DEFAULT_REGSIZE;
32 if (p->regspacing == 0)
33 p->regspacing = p->regsize;
34
35 pr[pidx++] = PROPERTY_ENTRY_U8("ipmi-type", p->type);
36 } else if (p->iftype == IPMI_PLAT_IF_SSIF) {
37 pr[pidx++] = PROPERTY_ENTRY_U16("i2c-addr", p->addr);
38 }
39
40 if (p->slave_addr)
41 pr[pidx++] = PROPERTY_ENTRY_U8("slave-addr", p->slave_addr);
42 pr[pidx++] = PROPERTY_ENTRY_U8("addr-source", p->addr_source);
43 if (p->regshift)
44 pr[pidx++] = PROPERTY_ENTRY_U8("reg-shift", p->regshift);
45 pr[pidx++] = PROPERTY_ENTRY_U8("reg-size", p->regsize);
46 /* Last entry must be left NULL to terminate it. */
47
48 pdev = platform_device_alloc(name, inst);
49 if (!pdev) {
50 pr_err("Error allocating IPMI platform device %s.%d\n",
51 name, inst);
52 return NULL;
53 }
54
55 if (size == 0)
56 /* An invalid or SSIF interface, no resources. */
57 goto add_properties;
58
59 /*
60 * Register spacing is derived from the resources in
61 * the IPMI platform code.
62 */
63
64 if (p->space == IPMI_IO_ADDR_SPACE)
65 flags = IORESOURCE_IO;
66 else
67 flags = IORESOURCE_MEM;
68
69 r[0].start = p->addr;
70 r[0].end = r[0].start + p->regsize - 1;
71 r[0].name = "IPMI Address 1";
72 r[0].flags = flags;
73
74 if (size > 1) {
75 r[1].start = r[0].start + p->regspacing;
76 r[1].end = r[1].start + p->regsize - 1;
77 r[1].name = "IPMI Address 2";
78 r[1].flags = flags;
79 num_r++;
80 }
81
82 if (size > 2) {
83 r[2].start = r[1].start + p->regspacing;
84 r[2].end = r[2].start + p->regsize - 1;
85 r[2].name = "IPMI Address 3";
86 r[2].flags = flags;
87 num_r++;
88 }
89
90 if (p->irq) {
91 r[num_r].start = p->irq;
92 r[num_r].end = p->irq;
93 r[num_r].name = "IPMI IRQ";
94 r[num_r].flags = IORESOURCE_IRQ;
95 num_r++;
96 }
97
98 rv = platform_device_add_resources(pdev, r, num_r);
99 if (rv) {
100 dev_err(&pdev->dev,
101 "Unable to add hard-code resources: %d\n", rv);
102 goto err;
103 }
104 add_properties:
105 rv = device_create_managed_software_node(&pdev->dev, pr, NULL);
106 if (rv) {
107 dev_err(&pdev->dev,
108 "Unable to add hard-code properties: %d\n", rv);
109 goto err;
110 }
111
112 rv = platform_device_add(pdev);
113 if (rv) {
114 dev_err(&pdev->dev,
115 "Unable to add hard-code device: %d\n", rv);
116 goto err;
117 }
118 return pdev;
119
120 err:
121 platform_device_put(pdev);
122 return NULL;
123 }
124 EXPORT_SYMBOL(ipmi_platform_add);
125