2 * Copyright (c) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <linux/of_address.h>
10 #include <linux/of_platform.h>
11 #include <linux/platform_device.h>
12 #include <linux/slab.h>
13 #include <linux/sys_soc.h>
14 #include <linux/bitfield.h>
15 #include <linux/regmap.h>
16 #include <linux/mfd/syscon.h>
18 #define MESON_SOCINFO_MAJOR_VER_MESON6 0x16
19 #define MESON_SOCINFO_MAJOR_VER_MESON8 0x19
20 #define MESON_SOCINFO_MAJOR_VER_MESON8B 0x1b
22 #define MESON_MX_ASSIST_HW_REV 0x14c
24 #define MESON_MX_ANALOG_TOP_METAL_REVISION 0x0
26 #define MESON_MX_BOOTROM_MISC_VER 0x4
28 static const char *meson_mx_socinfo_revision(unsigned int major_ver,
29 unsigned int misc_ver,
30 unsigned int metal_rev)
32 unsigned int minor_ver;
35 case MESON_SOCINFO_MAJOR_VER_MESON6:
39 case MESON_SOCINFO_MAJOR_VER_MESON8:
40 if (metal_rev == 0x11111112)
43 if (metal_rev == 0x11111111 || metal_rev == 0x11111112)
45 else if (metal_rev == 0x11111113)
47 else if (metal_rev == 0x11111133)
54 case MESON_SOCINFO_MAJOR_VER_MESON8B:
55 if (metal_rev == 0x11111111)
67 return kasprintf(GFP_KERNEL, "Rev%X (%x - 0:%X)", minor_ver, major_ver,
71 static const char *meson_mx_socinfo_soc_id(unsigned int major_ver,
72 unsigned int metal_rev)
77 case MESON_SOCINFO_MAJOR_VER_MESON6:
78 soc_id = "Meson6 (AML8726-MX)";
81 case MESON_SOCINFO_MAJOR_VER_MESON8:
82 if (metal_rev == 0x11111112)
83 soc_id = "Meson8m2 (S812)";
85 soc_id = "Meson8 (S802)";
89 case MESON_SOCINFO_MAJOR_VER_MESON8B:
90 soc_id = "Meson8b (S805)";
98 return kstrdup_const(soc_id, GFP_KERNEL);
101 static const struct of_device_id meson_mx_socinfo_analog_top_ids[] = {
102 { .compatible = "amlogic,meson8-analog-top", },
103 { .compatible = "amlogic,meson8b-analog-top", },
107 int __init meson_mx_socinfo_init(void)
109 struct soc_device_attribute *soc_dev_attr;
110 struct soc_device *soc_dev;
111 struct device_node *np;
112 struct regmap *assist_regmap, *bootrom_regmap, *analog_top_regmap;
113 unsigned int major_ver, misc_ver, metal_rev = 0;
117 syscon_regmap_lookup_by_compatible("amlogic,meson-mx-assist");
118 if (IS_ERR(assist_regmap))
119 return PTR_ERR(assist_regmap);
122 syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom");
123 if (IS_ERR(bootrom_regmap))
124 return PTR_ERR(bootrom_regmap);
126 np = of_find_matching_node(NULL, meson_mx_socinfo_analog_top_ids);
128 analog_top_regmap = syscon_node_to_regmap(np);
129 if (IS_ERR(analog_top_regmap))
130 return PTR_ERR(analog_top_regmap);
132 ret = regmap_read(analog_top_regmap,
133 MESON_MX_ANALOG_TOP_METAL_REVISION,
139 ret = regmap_read(assist_regmap, MESON_MX_ASSIST_HW_REV, &major_ver);
143 ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER,
148 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
152 soc_dev_attr->family = "Amlogic Meson";
154 np = of_find_node_by_path("/");
155 of_property_read_string(np, "model", &soc_dev_attr->machine);
158 soc_dev_attr->revision = meson_mx_socinfo_revision(major_ver, misc_ver,
160 soc_dev_attr->soc_id = meson_mx_socinfo_soc_id(major_ver, metal_rev);
162 soc_dev = soc_device_register(soc_dev_attr);
163 if (IS_ERR(soc_dev)) {
164 kfree_const(soc_dev_attr->revision);
165 kfree_const(soc_dev_attr->soc_id);
167 return PTR_ERR(soc_dev);
170 dev_info(soc_device_to_device(soc_dev), "Amlogic %s %s detected\n",
171 soc_dev_attr->soc_id, soc_dev_attr->revision);
175 device_initcall(meson_mx_socinfo_init);