mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 11:36:49 +07:00
fccc2b3675
We cannot pile all numbers on this list, just print the three hex digits representing the board ID so we can handle all the new RealView boards. Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2014 Linaro Ltd.
|
|
*
|
|
* Author: Linus Walleij <linus.walleij@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
#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>
|
|
|
|
/* System ID in syscon */
|
|
#define REALVIEW_SYS_ID_OFFSET 0x00
|
|
|
|
static const struct of_device_id realview_soc_of_match[] = {
|
|
{ .compatible = "arm,realview-eb-soc", },
|
|
{ .compatible = "arm,realview-pb1176-soc", },
|
|
{ .compatible = "arm,realview-pb11mp-soc", },
|
|
{ .compatible = "arm,realview-pba8-soc", },
|
|
{ .compatible = "arm,realview-pbx-soc", },
|
|
{ }
|
|
};
|
|
|
|
static u32 realview_coreid;
|
|
|
|
static const char *realview_arch_str(u32 id)
|
|
{
|
|
switch ((id >> 8) & 0xf) {
|
|
case 0x04:
|
|
return "AHB";
|
|
case 0x05:
|
|
return "Multi-layer AXI";
|
|
default:
|
|
return "Unknown";
|
|
}
|
|
}
|
|
|
|
static ssize_t realview_get_manf(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%02x\n", realview_coreid >> 24);
|
|
}
|
|
|
|
static struct device_attribute realview_manf_attr =
|
|
__ATTR(manufacturer, S_IRUGO, realview_get_manf, NULL);
|
|
|
|
static ssize_t realview_get_board(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "HBI-%03x\n", ((realview_coreid >> 16) & 0xfff));
|
|
}
|
|
|
|
static struct device_attribute realview_board_attr =
|
|
__ATTR(board, S_IRUGO, realview_get_board, NULL);
|
|
|
|
static ssize_t realview_get_arch(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%s\n", realview_arch_str(realview_coreid));
|
|
}
|
|
|
|
static struct device_attribute realview_arch_attr =
|
|
__ATTR(fpga, S_IRUGO, realview_get_arch, NULL);
|
|
|
|
static ssize_t realview_get_build(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%02x\n", (realview_coreid & 0xFF));
|
|
}
|
|
|
|
static struct device_attribute realview_build_attr =
|
|
__ATTR(build, S_IRUGO, realview_get_build, NULL);
|
|
|
|
static int realview_soc_probe(struct platform_device *pdev)
|
|
{
|
|
static struct regmap *syscon_regmap;
|
|
struct soc_device *soc_dev;
|
|
struct soc_device_attribute *soc_dev_attr;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
int ret;
|
|
|
|
syscon_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
|
|
if (IS_ERR(syscon_regmap))
|
|
return PTR_ERR(syscon_regmap);
|
|
|
|
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
|
|
if (!soc_dev_attr)
|
|
return -ENOMEM;
|
|
|
|
ret = of_property_read_string(np, "compatible",
|
|
&soc_dev_attr->soc_id);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
soc_dev_attr->machine = "RealView";
|
|
soc_dev_attr->family = "Versatile";
|
|
soc_dev = soc_device_register(soc_dev_attr);
|
|
if (IS_ERR(soc_dev)) {
|
|
kfree(soc_dev_attr);
|
|
return -ENODEV;
|
|
}
|
|
ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET,
|
|
&realview_coreid);
|
|
if (ret)
|
|
return -ENODEV;
|
|
|
|
device_create_file(soc_device_to_device(soc_dev), &realview_manf_attr);
|
|
device_create_file(soc_device_to_device(soc_dev), &realview_board_attr);
|
|
device_create_file(soc_device_to_device(soc_dev), &realview_arch_attr);
|
|
device_create_file(soc_device_to_device(soc_dev), &realview_build_attr);
|
|
|
|
dev_info(&pdev->dev, "RealView Syscon Core ID: 0x%08x, HBI-%03x\n",
|
|
realview_coreid,
|
|
((realview_coreid >> 16) & 0xfff));
|
|
/* FIXME: add attributes for SoC to sysfs */
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver realview_soc_driver = {
|
|
.probe = realview_soc_probe,
|
|
.driver = {
|
|
.name = "realview-soc",
|
|
.of_match_table = realview_soc_of_match,
|
|
},
|
|
};
|
|
builtin_platform_driver(realview_soc_driver);
|