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 },
29 { "AST2625", 0x05030403 },
32 static const char *siliconid_to_name(u32 siliconid)
34 unsigned int id = siliconid & 0xff00ffff;
37 for (i = 0 ; i < ARRAY_SIZE(rev_table) ; ++i) {
38 if (rev_table[i].id == id)
39 return rev_table[i].name;
45 static const char *siliconid_to_rev(u32 siliconid)
47 unsigned int rev = (siliconid >> 16) & 0xff;
48 unsigned int gen = (siliconid >> 24) & 0xff;
51 /* AST2500 and below */
77 static int __init aspeed_socinfo_init(void)
79 struct soc_device_attribute *attrs;
80 struct soc_device *soc_dev;
81 struct device_node *np;
83 bool has_chipid = false;
86 const char *machine = NULL;
88 np = of_find_compatible_node(NULL, NULL, "aspeed,silicon-id");
89 if (!of_device_is_available(np)) {
94 reg = of_iomap(np, 0);
99 siliconid = readl(reg);
102 /* This is optional, the ast2400 does not have it */
103 reg = of_iomap(np, 1);
106 chipid[0] = readl(reg);
107 chipid[1] = readl(reg + 4);
112 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
117 * Machine: Romulus BMC
120 * SoC ID: raw silicon revision id
121 * Serial Number: 64-bit chipid
124 np = of_find_node_by_path("/");
125 of_property_read_string(np, "model", &machine);
127 attrs->machine = kstrdup(machine, GFP_KERNEL);
130 attrs->family = siliconid_to_name(siliconid);
131 attrs->revision = siliconid_to_rev(siliconid);
132 attrs->soc_id = kasprintf(GFP_KERNEL, "%08x", siliconid);
135 attrs->serial_number = kasprintf(GFP_KERNEL, "%08x%08x",
136 chipid[1], chipid[0]);
138 soc_dev = soc_device_register(attrs);
139 if (IS_ERR(soc_dev)) {
140 kfree(attrs->soc_id);
141 kfree(attrs->serial_number);
143 return PTR_ERR(soc_dev);
146 pr_info("ASPEED %s rev %s (%s)\n",
153 early_initcall(aspeed_socinfo_init);