Welcome to the Linux Foundation Forum!
need to upgrade kernel with driver- ISL1221 RTC
Options
sjremya
Posts: 11
Hi all
i m a beginner in device drivers.
I m using linux kernel 2-6-20 , which is for our application with AT91SAM9260 processor.
I would like to use an RTC to update my system time, the chip is RTC - ISL1221 from intersil.
This kernel is supporting ISL 1208 but not ISL 1221 . [ I could see few options in kernel configuration time, but ISL 1221 is not present in the device drivers-> real time clock -> RTC drivers list. ]
HOW CAN I CONFIGURE THIS KERNEL FOR THIS NEW RTC , if i write a driver for this?
Please help me out
Regards
SJR
0
Comments
-
thanks for the reply
I could find a solution for this ....
I have added the new RTC configuration in /linux/drivers/rtc/Kconfig as shown below, and now i am able to configure the kernel with the new chip ISL 1221
<
config RTC_DRV_ISL1221
tristate "Intersil 1221"
depends on RTC_CLASS && I2C
help
If you say yes here you get support for the
Intersil 1221 RTC chip.
This driver can also be built as a module. If so, the module
will be called rtc-isl1221.
>
Hope now i can go ahead with the driver developement for RTC ISL 1221
Please correct me if I m doing any thing wrong ....
thanks in advance
SJR0 -
<
config RTC_DRV_ISL1221
tristate "Intersil 1221"
depends on RTC_CLASS && I2C
help
If you say yes here you get support for the
Intersil 1221 RTC chip.
This driver can also be built as a module. If so, the module
will be called rtc-isl1221.
>
That makes no sense to me. You put all that in the config file?0 -
yes ... i have changed the configuration file for rtc drivers ...............
do u have some thing more to share regarding this ??0 -
You seem to be on the right track, by my understanding your modification should tell the RTC core to use your driver to communicate. But before that modification is made you will need to build the kernel driver, you can refer to the other drivers in /usr/src/linux/drivers/rtc for examples on working modules. Once the driver has been written and your Kconfig has been applied you will also need to build a custom kernel using your modified files before it will be detected by the running kernel.0
-
Hi mfillpot
Thanks for the valuable advice ..........
I have configured my new chip in Kconfig & added it i Makefile too ....
Now i am able to create the kernel with the new rtc chip ( which is running with a dummy driver for time being ) .
Now I hope, I can go ahead with the driver development.
Guide me if I m wrong in any line
Regards
SJR0 -
So far you have been finding many of the necessary steps to integrate the driver. The big step which you still have in front of you is the development, by comparing existing comparative drivers and cross referencing them against your dummy driver you should have a good core in place to complete the development.
Once you have a working driver I would highly recommend checking out http://kernel.org/faq/#kernelbuild and the linked sites so you can contribute the driver into the mainstream kernel so no one else will have to go through the difficulty that you are experiencing to use the device.
I look forward to seeing your code as you get further into the process and seeing what difficulties and/or bugs you experience during the development process.0 -
sure .........
thanks once again .....0
Categories
- All Categories
- 112 LFX Mentorship
- 112 LFX Mentorship: Linux Kernel
- 604 Linux Foundation IT Professional Programs
- 315 Cloud Engineer IT Professional Program
- 139 Advanced Cloud Engineer IT Professional Program
- 52 DevOps Engineer IT Professional Program
- 67 Cloud Native Developer IT Professional Program
- 4 Express Training Courses
- 4 Express Courses - Discussion Forum
- 5.3K Training Courses
- 17 LFC110 Class Forum - Discontinued
- 8 LFC131 Class Forum
- 30 LFD102 Class Forum
- 178 LFD103 Class Forum
- LFD110 Class Forum
- 24 LFD121 Class Forum
- LFD133 Class Forum
- 2 LFD137 Class Forum
- 62 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 127 LFD232 Class Forum - Discontinued
- LFD233 Class Forum
- LFD237 Class Forum
- 22 LFD254 Class Forum
- 643 LFD259 Class Forum
- 107 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 1 LFS101 Class Forum
- LFS112 Class Forum
- LFS116 Class Forum
- LFS118 Class Forum
- LFS142 Class Forum
- LFS144 Class Forum
- 2 LFS145 Class Forum
- LFS146 Class Forum
- LFS151 Class Forum
- LFS157 Class Forum
- LFS158 Class Forum
- LFS162 Class Forum
- LFS166 Class Forum
- LFS167 Class Forum
- 28 LFS200 Class Forum
- 735 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 13 LFS203 Class Forum
- 98 LFS207 Class Forum
- 299 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 36 LFS243 Class Forum
- 12 LFS244 Class Forum
- LFS245 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 141 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- 2 LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 9 LFS258-JP クラス フォーラム
- 109 LFS260 Class Forum
- 144 LFS261 Class Forum
- 39 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 20 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 198 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 254 LFW211 Class Forum
- 173 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 781 Hardware
- 198 Drivers
- 68 I/O Devices
- 37 Monitors
- 95 Multimedia
- 174 Networking
- 87 Printers & Scanners
- 83 Storage
- 742 Linux Distributions
- 80 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 23 openSUSE
- 143 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 347 Ubuntu
- 450 Linux System Administration
- 31 Cloud Computing
- 69 Command Line/Scripting
- Github systems admin projects
- 89 Linux Security
- 76 Network Management
- 101 System Management
- 46 Web Management
- 51 Mobile Computing
- 18 Android
- 23 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 355 Off Topic
- 109 Introductions
- 167 Small Talk
- 18 Study Material
- 504 Programming and Development
- 283 Kernel Development
- 203 Software Development
- 844 Software
- 210 Applications
- 180 Command Line
- 3 Compiling/Installing
- 107 Games
- 308 Installation
- 51 All In Program
- 51 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)