mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 12:35:17 +07:00
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* arch/arm/common/bL_switcher_dummy_if.c -- b.L switcher dummy interface
|
|
*
|
|
* Created by: Nicolas Pitre, November 2012
|
|
* Copyright: (C) 2012-2013 Linaro Limited
|
|
*
|
|
* Dummy interface to user space for debugging purpose only.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/bL_switcher.h>
|
|
|
|
static ssize_t bL_switcher_write(struct file *file, const char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
unsigned char val[3];
|
|
unsigned int cpu, cluster;
|
|
int ret;
|
|
|
|
pr_debug("%s\n", __func__);
|
|
|
|
if (len < 3)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(val, buf, 3))
|
|
return -EFAULT;
|
|
|
|
/* format: <cpu#>,<cluster#> */
|
|
if (val[0] < '0' || val[0] > '9' ||
|
|
val[1] != ',' ||
|
|
val[2] < '0' || val[2] > '1')
|
|
return -EINVAL;
|
|
|
|
cpu = val[0] - '0';
|
|
cluster = val[2] - '0';
|
|
ret = bL_switch_request(cpu, cluster);
|
|
|
|
return ret ? : len;
|
|
}
|
|
|
|
static const struct file_operations bL_switcher_fops = {
|
|
.write = bL_switcher_write,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct miscdevice bL_switcher_device = {
|
|
MISC_DYNAMIC_MINOR,
|
|
"b.L_switcher",
|
|
&bL_switcher_fops
|
|
};
|
|
module_misc_device(bL_switcher_device);
|
|
|
|
MODULE_AUTHOR("Nicolas Pitre <nico@linaro.org>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("big.LITTLE switcher dummy user interface");
|