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 },
28 { "AST2605", 0x05030103 },
31 static const char *siliconid_to_name(u32 siliconid)
33 unsigned int id = siliconid & 0xff00ffff;
36 for (i = 0 ; i < ARRAY_SIZE(rev_table) ; ++i) {
37 if (rev_table[i].id == id)
38 return rev_table[i].name;
44 static const char *siliconid_to_rev(u32 siliconid)
46 unsigned int rev = (siliconid >> 16) & 0xff;
47 unsigned int gen = (siliconid >> 24) & 0xff;
50 /* AST2500 and below */
76 static int __init aspeed_socinfo_init(void)
78 struct soc_device_attribute *attrs;
79 struct soc_device *soc_dev;
80 struct device_node *np;
82 bool has_chipid = false;
85 const char *machine = NULL;
87 np = of_find_compatible_node(NULL, NULL, "aspeed,silicon-id");
88 if (!of_device_is_available(np)) {
93 reg = of_iomap(np, 0);
98 siliconid = readl(reg);
101 /* This is optional, the ast2400 does not have it */
102 reg = of_iomap(np, 1);
105 chipid[0] = readl(reg);
106 chipid[1] = readl(reg + 4);
111 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
116 * Machine: Romulus BMC
119 * SoC ID: raw silicon revision id
120 * Serial Number: 64-bit chipid
123 np = of_find_node_by_path("/");
124 of_property_read_string(np, "model", &machine);
126 attrs->machine = kstrdup(machine, GFP_KERNEL);
129 attrs->family = siliconid_to_name(siliconid);
130 attrs->revision = siliconid_to_rev(siliconid);
131 attrs->soc_id = kasprintf(GFP_KERNEL, "%08x", siliconid);
134 attrs->serial_number = kasprintf(GFP_KERNEL, "%08x%08x",
135 chipid[1], chipid[0]);
137 soc_dev = soc_device_register(attrs);
138 if (IS_ERR(soc_dev)) {
139 kfree(attrs->soc_id);
140 kfree(attrs->serial_number);
142 return PTR_ERR(soc_dev);
145 pr_info("ASPEED %s rev %s (%s)\n",
152 early_initcall(aspeed_socinfo_init);