xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mei: expose fw version to sysfs

Browse Source 
The ME FW version is constantly used by detection and update tools.
To improve the reliability and simplify these tools provide
a sysfs interface to access version of the platform ME firmware
in the following format:
<platform>:<major>.<minor>.<milestone>.<build>.
There can be up to three such blocks for different FW components.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2018-06-25 00:11:41 +03:00
committed by Greg Kroah-Hartman
parent 9a7c0b69b6
commit 3cfaeb3353
4 changed files with 144 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/misc/mei/main.c
View File

@@ -1,7 +1,7 @@
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2012, Intel Corporation.
* Copyright (c) 2003-2018, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -812,11 +812,39 @@ static ssize_t tx_queue_limit_store(struct device *device,
}
static DEVICE_ATTR_RW(tx_queue_limit);
/**
* fw_ver_show - display ME FW version
*
* @device: device pointer
* @attr: attribute pointer
* @buf: char out buffer
*
* Return: number of the bytes printed into buf or error
*/
static ssize_t fw_ver_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mei_device *dev = dev_get_drvdata(device);
struct mei_fw_version *ver;
ssize_t cnt = 0;
int i;
ver = dev->fw_ver;
for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++)
cnt += scnprintf(buf + cnt, PAGE_SIZE - cnt, "%u:%u.%u.%u.%u\n",
ver[i].platform, ver[i].major, ver[i].minor,
ver[i].hotfix, ver[i].buildno);
return cnt;
}
static DEVICE_ATTR_RO(fw_ver);
static struct attribute *mei_attrs[] = {
&dev_attr_fw_status.attr,
&dev_attr_hbm_ver.attr,
&dev_attr_hbm_ver_drv.attr,
&dev_attr_tx_queue_limit.attr,
&dev_attr_fw_ver.attr,
NULL
};
ATTRIBUTE_GROUPS(mei);