31dba973d3
Update the name of the sysfs node to extended_cache_enable for proper readability. Change-Id: I11e16d7df72e863547dc6880b64a94fbca1c7413 Signed-off-by: Raghavendra Kakarla <rkakarla@codeaurora.org>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/arm-smccc.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/kobject.h>
|
|
|
|
#define L2_REUSE_SMC_ID 0x00200090C
|
|
|
|
static bool l2_reuse_enable;
|
|
static struct kobject *l2_reuse_kobj;
|
|
|
|
static ssize_t sysfs_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%u\n", l2_reuse_enable);
|
|
}
|
|
|
|
static ssize_t sysfs_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
ret = kstrtobool(buf, &l2_reuse_enable);
|
|
if (ret) {
|
|
pr_err("Invalid argument passed\n");
|
|
return ret;
|
|
}
|
|
|
|
arm_smccc_smc(L2_REUSE_SMC_ID, l2_reuse_enable, 1, 0, 0, 0, 0, 0, &res);
|
|
return count;
|
|
}
|
|
|
|
struct kobj_attribute l2_reuse_attr = __ATTR(extended_cache_enable, 0660,
|
|
sysfs_show, sysfs_store);
|
|
|
|
static int __init l2_reuse_driver_init(void)
|
|
{
|
|
l2_reuse_kobj = kobject_create_and_add("l2_reuse", power_kobj);
|
|
|
|
if (!l2_reuse_kobj) {
|
|
pr_info("kobj creation for l2_reuse failed\n");
|
|
return 0;
|
|
}
|
|
|
|
if (sysfs_create_file(l2_reuse_kobj, &l2_reuse_attr.attr))
|
|
kobject_put(l2_reuse_kobj);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __exit l2_reuse_driver_exit(void)
|
|
{
|
|
if (l2_reuse_kobj) {
|
|
sysfs_remove_file(power_kobj, &l2_reuse_attr.attr);
|
|
kobject_put(l2_reuse_kobj);
|
|
}
|
|
}
|
|
|
|
module_init(l2_reuse_driver_init);
|
|
module_exit(l2_reuse_driver_exit);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm Technologies Inc L2 REUSE Module");
|
|
MODULE_LICENSE("GPL v2");
|