^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2014 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sys_soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /* System ID in syscon */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define REALVIEW_SYS_ID_OFFSET 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static const struct of_device_id realview_soc_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) { .compatible = "arm,realview-eb-soc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) { .compatible = "arm,realview-pb1176-soc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) { .compatible = "arm,realview-pb11mp-soc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) { .compatible = "arm,realview-pba8-soc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) { .compatible = "arm,realview-pbx-soc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static u32 realview_coreid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static const char *realview_arch_str(u32 id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) switch ((id >> 8) & 0xf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) case 0x04:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return "AHB";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) case 0x05:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return "Multi-layer AXI";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return "Unknown";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) manufacturer_show(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return sprintf(buf, "%02x\n", realview_coreid >> 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static DEVICE_ATTR_RO(manufacturer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) board_show(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return sprintf(buf, "HBI-%03x\n", ((realview_coreid >> 16) & 0xfff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static DEVICE_ATTR_RO(board);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) fpga_show(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return sprintf(buf, "%s\n", realview_arch_str(realview_coreid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static DEVICE_ATTR_RO(fpga);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) build_show(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return sprintf(buf, "%02x\n", (realview_coreid & 0xFF));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static DEVICE_ATTR_RO(build);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct attribute *realview_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) &dev_attr_manufacturer.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) &dev_attr_board.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) &dev_attr_fpga.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) &dev_attr_build.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ATTRIBUTE_GROUPS(realview);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static int realview_soc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct regmap *syscon_regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct soc_device *soc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct soc_device_attribute *soc_dev_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) syscon_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (IS_ERR(syscon_regmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return PTR_ERR(syscon_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!soc_dev_attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ret = of_property_read_string(np, "compatible",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) &soc_dev_attr->soc_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) soc_dev_attr->machine = "RealView";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) soc_dev_attr->family = "Versatile";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) soc_dev_attr->custom_attr_group = realview_groups[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) soc_dev = soc_device_register(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (IS_ERR(soc_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) kfree(soc_dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) &realview_coreid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) dev_info(&pdev->dev, "RealView Syscon Core ID: 0x%08x, HBI-%03x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) realview_coreid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ((realview_coreid >> 16) & 0xfff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* FIXME: add attributes for SoC to sysfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static struct platform_driver realview_soc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .probe = realview_soc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .name = "realview-soc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .of_match_table = realview_soc_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) builtin_platform_driver(realview_soc_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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