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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2014 Linaro Ltd. * * Author: Linus Walleij <linus.walleij@linaro.org> */ #include <linux/init.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/sys_soc.h> #include <linux/platform_device.h> #include <linux/mfd/syscon.h> #include <linux/regmap.h> #include <linux/of.h> #define INTEGRATOR_HDR_ID_OFFSET 0x00 static u32 integrator_coreid; static const struct of_device_id integrator_cm_match[] = { { .compatible = "arm,core-module-integrator", }, { } }; static const char *integrator_arch_str(u32 id) { switch ((id >> 16) & 0xff) { case 0x00: return "ASB little-endian"; case 0x01: return "AHB little-endian"; case 0x03: return "AHB-Lite system bus, bi-endian"; case 0x04: return "AHB"; case 0x08: return "AHB system bus, ASB processor bus"; default: return "Unknown"; } } static const char *integrator_fpga_str(u32 id) { switch ((id >> 12) & 0xf) { case 0x01: return "XC4062"; case 0x02: return "XC4085"; case 0x03: return "XVC600"; case 0x04: return "EPM7256AE (Altera PLD)"; default: return "Unknown"; } } static ssize_t manufacturer_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%02x\n", integrator_coreid >> 24); } static DEVICE_ATTR_RO(manufacturer); static ssize_t arch_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid)); } static DEVICE_ATTR_RO(arch); static ssize_t fpga_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid)); } static DEVICE_ATTR_RO(fpga); static ssize_t build_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF); } static DEVICE_ATTR_RO(build); static struct attribute *integrator_attrs[] = { &dev_attr_manufacturer.attr, &dev_attr_arch.attr, &dev_attr_fpga.attr, &dev_attr_build.attr, NULL }; ATTRIBUTE_GROUPS(integrator); static int __init integrator_soc_init(void) { struct regmap *syscon_regmap; struct soc_device *soc_dev; struct soc_device_attribute *soc_dev_attr; struct device_node *np; struct device *dev; u32 val; int ret; np = of_find_matching_node(NULL, integrator_cm_match); if (!np) return -ENODEV; syscon_regmap = syscon_node_to_regmap(np); if (IS_ERR(syscon_regmap)) return PTR_ERR(syscon_regmap); ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET, &val); if (ret) return -ENODEV; integrator_coreid = val; soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); if (!soc_dev_attr) return -ENOMEM; soc_dev_attr->soc_id = "Integrator"; soc_dev_attr->machine = "Integrator"; soc_dev_attr->family = "Versatile"; soc_dev_attr->custom_attr_group = integrator_groups[0]; soc_dev = soc_device_register(soc_dev_attr); if (IS_ERR(soc_dev)) { kfree(soc_dev_attr); return -ENODEV; } dev = soc_device_to_device(soc_dev); dev_info(dev, "Detected ARM core module:\n"); dev_info(dev, " Manufacturer: %02x\n", (val >> 24)); dev_info(dev, " Architecture: %s\n", integrator_arch_str(val)); dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val)); dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF); dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03))); return 0; } device_initcall(integrator_soc_init); |