mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 23:36:44 +07:00
eda413c228
Here we make use of the new System-On-Chip bus driver to export vital SoC information out to userspace via sysfs. This patch provides a data structure of strings to populate the base nodes found in: /sys/devices/soc[0|1|2|...]/[family|machine|revision|soc_id]. It also adds one more node as requested by ST-Ericsson. 'process' depicts the way in which the silicon was manufactured. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*
|
|
* Copyright (C) ST-Ericsson SA 2010
|
|
*
|
|
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
|
|
* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
|
|
* License terms: GNU General Public License (GPL) version 2
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/mfd/db8500-prcmu.h>
|
|
#include <linux/mfd/db5500-prcmu.h>
|
|
#include <linux/clksrc-dbx500-prcmu.h>
|
|
#include <linux/sys_soc.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/stat.h>
|
|
|
|
#include <asm/hardware/gic.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/localtimer.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/setup.h>
|
|
#include <mach/devices.h>
|
|
|
|
#include "clock.h"
|
|
|
|
void __iomem *_PRCMU_BASE;
|
|
|
|
void __init ux500_init_irq(void)
|
|
{
|
|
void __iomem *dist_base;
|
|
void __iomem *cpu_base;
|
|
|
|
if (cpu_is_u5500()) {
|
|
dist_base = __io_address(U5500_GIC_DIST_BASE);
|
|
cpu_base = __io_address(U5500_GIC_CPU_BASE);
|
|
} else if (cpu_is_u8500()) {
|
|
dist_base = __io_address(U8500_GIC_DIST_BASE);
|
|
cpu_base = __io_address(U8500_GIC_CPU_BASE);
|
|
} else
|
|
ux500_unknown_soc();
|
|
|
|
gic_init(0, 29, dist_base, cpu_base);
|
|
|
|
/*
|
|
* Init clocks here so that they are available for system timer
|
|
* initialization.
|
|
*/
|
|
if (cpu_is_u5500())
|
|
db5500_prcmu_early_init();
|
|
if (cpu_is_u8500())
|
|
db8500_prcmu_early_init();
|
|
clk_init();
|
|
}
|
|
|
|
static const char * __init ux500_get_machine(void)
|
|
{
|
|
return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
|
|
}
|
|
|
|
static const char * __init ux500_get_family(void)
|
|
{
|
|
return kasprintf(GFP_KERNEL, "ux500");
|
|
}
|
|
|
|
static const char * __init ux500_get_revision(void)
|
|
{
|
|
unsigned int rev = dbx500_revision();
|
|
|
|
if (rev == 0x01)
|
|
return kasprintf(GFP_KERNEL, "%s", "ED");
|
|
else if (rev >= 0xA0)
|
|
return kasprintf(GFP_KERNEL, "%d.%d",
|
|
(rev >> 4) - 0xA + 1, rev & 0xf);
|
|
|
|
return kasprintf(GFP_KERNEL, "%s", "Unknown");
|
|
}
|
|
|
|
static ssize_t ux500_get_process(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
if (dbx500_id.process == 0x00)
|
|
return sprintf(buf, "Standard\n");
|
|
|
|
return sprintf(buf, "%02xnm\n", dbx500_id.process);
|
|
}
|
|
|
|
static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
|
|
const char *soc_id)
|
|
{
|
|
soc_dev_attr->soc_id = soc_id;
|
|
soc_dev_attr->machine = ux500_get_machine();
|
|
soc_dev_attr->family = ux500_get_family();
|
|
soc_dev_attr->revision = ux500_get_revision();
|
|
}
|
|
|
|
struct device_attribute ux500_soc_attr =
|
|
__ATTR(process, S_IRUGO, ux500_get_process, NULL);
|
|
|
|
struct device * __init ux500_soc_device_init(const char *soc_id)
|
|
{
|
|
struct device *parent;
|
|
struct soc_device *soc_dev;
|
|
struct soc_device_attribute *soc_dev_attr;
|
|
|
|
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
|
|
if (!soc_dev_attr)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
soc_info_populate(soc_dev_attr, soc_id);
|
|
|
|
soc_dev = soc_device_register(soc_dev_attr);
|
|
if (IS_ERR_OR_NULL(soc_dev)) {
|
|
kfree(soc_dev_attr);
|
|
return NULL;
|
|
}
|
|
|
|
parent = soc_device_to_device(soc_dev);
|
|
if (!IS_ERR_OR_NULL(parent))
|
|
device_create_file(parent, &ux500_soc_attr);
|
|
|
|
return parent;
|
|
}
|