转载请注明出处：https://www.cnblogs.com/lialong1st/p/8515135.html

CPU：RK3288

系统：Android 5.1

RK3288 查看 ddr 当前频率的方式有两种，第一种是通过 adb 查看，第二种是在串口打印中通过指令查看

1、通过 adb 查看

$ adb shell

root@rk3288:/ # cd sys/kernel/debug/clk

cd sys/kernel/debug/clk

root@rk3288:/sys/kernel/debug/clk # cat clk_summary |grep ddr

cat clk_summary |grep ddr

       clk_ddr

2、在串口打印中通过指令查看当前ddr频率可以，但是adb中是看不到的。

shell@firefly:/ $ cd sys/dvfs

shell@firefly:/sys/dvfs $ ls

cpu_temp_enable

cpu_temp_target

dvfs_tree

shell@firefly:/sys/dvfs $ cat dvfs_tree

/system/bin/sh: cat: dvfs_tree: Permission denied     // 没有权限

|shell@firefly:/sys/dvfs $ su     // 获取root权限

shell@firefly:/sys/dvfs # cat dvfs_tree

[ 107.795152] -------------DVFS TREE-----------

[ 107.795152]

[ 107.795152]

[ 107.795205] DVFS TREE:

[ 107.795220] |

[ 107.795220] |- voltage domain:vd_gpu

[ 107.795239] |- current voltage:

[ 107.795252] |- current regu_mode:UNKNOWN

[ 107.795269] | |

[ 107.795269] | |- power domain:pd_gpu, status = OFF, current volt = , current regu_mode = UNKNOWN

[ 107.795295] | | |

[ 107.795295] | | |- clock: clk_gpu current: rate , volt = , enable_dvfs = ENABLE

[ 107.795321] | | |- clk limit(enable):[, ]; last set rate =

[ 107.795336] | | | |- freq = , volt =

[ 107.795350] | | | |- freq = , volt =

[ 107.795363] | | | |- freq = , volt =

[ 107.795377] | | | |- freq = , volt =

[ 107.795392] | | |- clock: clk_gpu current: rate , regu_mode = UNKNOWN, regu_mode_en =

[ 107.795407] |

[ 107.795407] |- voltage domain:vd_logic

[ 107.795425] |- current voltage:

[ 107.795437] |- current regu_mode:UNKNOWN

[ 107.795452] | |

[ 107.795452] | |- power domain:pd_vio, status = OFF, current volt = , current regu_mode = UNKNOWN

[ 107.795476] | | |

[ 107.795476] | | |- clock: aclk_vio1 current: rate , volt = , enable_dvfs = ENABLE

[ 107.795501] | | |- clk limit(enable):[, ]; last set rate =

[ 107.795516] | | | |- freq = , volt =

[ 107.795530] | | | |- freq = , volt =

[ 107.795545] | | |- clock: aclk_vio1 current: rate , regu_mode = UNKNOWN, regu_mode_en =

[ 107.795563] | |

[ 107.795563] | |- power domain:pd_ddr, status = OFF, current volt = , current regu_mode = UNKNOWN

[ 107.795587] | | |

[ 107.795587] | | |- clock: clk_ddr current: rate , volt = , enable_dvfs = ENABLE     // 456000为ddr频率，单位为KHz

[ 107.795612] | | |- clk limit(enable):[, ]; last set rate =

[ 107.795626] | | | |- freq = , volt =

[ 107.795640] | | | |- freq = , volt =

[ 107.795653] | | | |- freq = , volt =

[ 107.795666] | | | |- freq = , volt =

[ 107.795682] | | |- clock: clk_ddr current: rate , regu_mode = UNKNOWN, regu_mode_en =

[ 107.795696] |

[ 107.795696] |- voltage domain:vd_arm

[ 107.795714] |- current voltage:

[ 107.795726] |- current regu_mode:UNKNOWN

[ 107.795740] | |

[ 107.795740] | |- power domain:pd_core, status = OFF, current volt = , current regu_mode = UNKNOWN

[ 107.795765] | | |

[ 107.795765] | | |- clock: clk_core current: rate , volt = , enable_dvfs = ENABLE

[ 107.795789] | | |- clk limit(enable):[, ]; last set rate =

[ 107.795804] | | | |- freq = , volt =

[ 107.795817] | | | |- freq = , volt =

[ 107.795830] | | | |- freq = , volt =

[ 107.795843] | | | |- freq = , volt =

[ 107.795856] | | | |- freq = , volt =

[ 107.795869] | | | |- freq = , volt =

[ 107.795882] | | | |- freq = , volt =

[ 107.795895] | | | |- freq = , volt =

[ 107.795909] | | | |- freq = , volt =

[ 107.795922] | | | |- freq = , volt =

[ 107.795936] | | | |- freq = , volt =

[ 107.795949] | | | |- freq = , volt =

[ 107.795962] | | | |- freq = , volt =

[ 107.795975] | | | |- freq = , volt =

[ 107.795990] | | |- clock: clk_core current: rate , regu_mode = UNKNOWN, regu_mode_en =

[ 107.796004] -------------DVFS TREE END------------

RK3288 查看ddr频率的更多相关文章

  1. RK3288 修改ddr频率

    转载请注明出处:https://www.cnblogs.com/lialong1st/p/10912334.html CPU:RK3288 系统:Android 5.1 RK3288 的 ddr 频率 ...

  2. RK3288 查看ddr信息

    转载请注明出处:https://www.cnblogs.com/lialong1st/p/10910949.html CPU:RK3288 系统:Android 5.1 1.查看ddr驱动版本号.容量 ...

  3. 查看DDR的频率【学习笔记】

    SDM439平台如何查看DDR的频率 通过访问如下节点查询:cat /sys/kernel/debug/clk/bimc_clk/measure 681.6MHz and higher frequen ...

  4. linux下查看内存频率,内核函数,cpu频率

    查看CPU: cat /proc/cpuinfo # 总核数 = 物理CPU个数 X 每颗物理CPU的核数 # 总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数 # 查看物理 ...

  5. windows查看内存频率

    命令行查看: wmic memorychip 任务管理器查看: 任务管理器-性能-内存-速度

  6. RK3288 查看时钟树

    主控端可以通过指令查看时钟树,enable_cnt为1,表示时钟已使能. # cat d/clk/clk_summary cat d/clk/clk_summary clock enable_cnt ...

  7. 查看嵌入式设备的CPU频率

    对于有多个核心的CPU,查看CPU 频率的方法是: cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq 上面的这个是查看核心0的cpu的 ...

  8. RK30SDK开发板驱动分析（二）：DDR频率配置

    在内核配置界界面,我们可以很容易的配置DDR的频率,300M OR 600M, so easy! 那么它是如何起作用的呢? 回想 RK30SDK开发板驱动分析(一) 末尾提到MACHINE_START ...

  9. tms320dm6446内核启动分析

    关于达芬奇DM6446,里面内部有两个部分,一个是ARM926ejs的核,还有一个是C64+DSP的视频处理核,而我需要关心的重点是arm926ejs的核(bootload和linux内核) 从boo ...

随机推荐

  1. CodeForces 297A Parity Game (脑补题)

    题意 一个01串,可以有两种操作:①在末尾添加parity(a):②删除开头的一个字符.其中parity(a),当串中1的个数为奇数时为1,偶数时为0.问某个01串是否可以通过若干操作变成另一个01串 ...

  2. node 封装db层

    var db = {}; var mysql = require('mysql'); var pool = mysql.createPool({ connectionLimit: , host: '1 ...

  3. CF445

    题解: xjb乱判断一下就可以了 代码: #include<bits/stdc++.h> using namespace std; typedef long long ll; int n, ...

  4. 二进制包形式安装mysql5.7.17

    mysql5.7与mysql5.5的安装方式有些区别,如果按照5.5的方式来安装5.7就会有很多报错信息,下面介绍mysql5.7.17的二进制安装方式. 首先安装依赖包: yum -y instal ...

  5. Easyui datagrid自定义排序

    做项目遇到个关于排序问题,想着在前端排序,正好Easyui有这个功能,所以就拿来用了一下,因为跟官网的Demo不太一样,所以总结一下: 首先这一列是要排序的列(当然,在生产环境,这一列是隐藏的,在开发 ...

  6. C++11_Type Traits

    版权声明:本文为博主原创文章,未经博主允许不得转载. 识别变量的type id,返回true或false,举一个简单使用的例子 template <typename T> void typ ...

  7. height 与 min-height 的继承

    min-height: inherit; 继承父元素的 min-height: 80px; 但,不能继承父元素的 height: 200px; height: inherit; 能继承父元素的: he ...

  8. python函数作用域

    python中函数作用域 在python中,一个函数就是一个作用域 name = 'xiaoyafei' def change_name(): name = '肖亚飞' print('在change_ ...

  9. 实现Python代码发送邮件

    import smtplib from email.mime.text import MIMEText from email.utils import formataddr msg = MIMETex ...

  10. JavaScript 中 OnLoad事件用法总结

    还差一天现在手头上的这套网站就写完了,中午蹭了半天还是没睡好,干脆爬起来把今天上午写到的onload事件给整理一下. 一般用到比较多的就是初始化数据或者效果. 1.直接写在<body>标签 ...