1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright 2019 IBM Corp. */
6 #include <linux/of_address.h>
7 #include <linux/of_platform.h>
8 #include <linux/platform_device.h>
9 #include <linux/slab.h>
10 #include <linux/sys_soc.h>
15 } const rev_table[] = {
17 { "AST2400", 0x02000303 },
18 { "AST1400", 0x02010103 },
19 { "AST1250", 0x02010303 },
21 { "AST2500", 0x04000303 },
22 { "AST2510", 0x04000103 },
23 { "AST2520", 0x04000203 },
24 { "AST2530", 0x04000403 },
26 { "AST2600", 0x05000303 },
27 { "AST2620", 0x05010203 },
30 static const char *siliconid_to_name(u32 siliconid)
32 unsigned int id = siliconid & 0xff00ffff;
35 for (i = 0 ; i < ARRAY_SIZE(rev_table) ; ++i) {
36 if (rev_table[i].id == id)
37 return rev_table[i].name;
43 static const char *siliconid_to_rev(u32 siliconid)
45 unsigned int rev = (siliconid >> 16) & 0xff;
59 static int __init aspeed_socinfo_init(void)
61 struct soc_device_attribute *attrs;
62 struct soc_device *soc_dev;
63 struct device_node *np;
65 bool has_chipid = false;
68 const char *machine = NULL;
70 np = of_find_compatible_node(NULL, NULL, "aspeed,silicon-id");
71 if (!of_device_is_available(np)) {
76 reg = of_iomap(np, 0);
79 siliconid = readl(reg);
82 /* This is optional, the ast2400 does not have it */
83 reg = of_iomap(np, 1);
86 chipid[0] = readl(reg);
87 chipid[1] = readl(reg + 4);
92 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
97 * Machine: Romulus BMC
100 * SoC ID: raw silicon revision id
101 * Serial Number: 64-bit chipid
104 np = of_find_node_by_path("/");
105 of_property_read_string(np, "model", &machine);
107 attrs->machine = kstrdup(machine, GFP_KERNEL);
110 attrs->family = siliconid_to_name(siliconid);
111 attrs->revision = siliconid_to_rev(siliconid);
112 attrs->soc_id = kasprintf(GFP_KERNEL, "%08x", siliconid);
115 attrs->serial_number = kasprintf(GFP_KERNEL, "%08x%08x",
116 chipid[1], chipid[0]);
118 soc_dev = soc_device_register(attrs);
119 if (IS_ERR(soc_dev)) {
120 kfree(attrs->soc_id);
121 kfree(attrs->serial_number);
123 return PTR_ERR(soc_dev);
126 pr_info("ASPEED %s rev %s (%s)\n",
133 early_initcall(aspeed_socinfo_init);