[OpenWrt-Devel] i2c device not in /dev

[Baptiste Clenet]

Works now! Think the .dts wasn't taken into account correctly.

2015-09-15 17:32 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
> 2015-09-15 13:57 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
>> 2015-09-14 20:17 GMT+02:00 John Crispin <blogic at openwrt.org>:
>>>
>>>
>>> On 14/09/2015 20:09, Daniel Golle wrote:
>>>> On Mon, Sep 14, 2015 at 07:47:08PM +0200, John Crispin wrote:
>>>>> On 14/09/2015 19:28, Baptiste Clenet wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I'm using a MT7628 chip and I try to implement an I2C device which
>>>>>> will use i2c-ralink adapter. I registered my i2c device with
>>>>>> module_i2c_driver(i2c_device_driver);
>>>>>>
>>>>>> I can see it on my bus:
>>>>>> ./sys/bus/i2c/drivers/i2c_device_driver
>>>>>> But it doesn't appear in /dev.
>>>>>>
>>>>>> What am I doing wrong?
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>
>>>>> you are missing CONFIG_I2C_CHARDEV in the kernel config
>>>>
>>>> or maybe i2c-dev isn't loaded? try
>>>> modprobe i2c-dev
>>>>
>>>
>>> i2c-dev is part of i2c-core if that symbol is selected. i2c-core uses
>>> AutoLoad and not AutoProbe so it should always load.
>>
>> Thnaks for the answer.
>>
>> i2c-dev and i2c-core are loaded as well as i2c-ralink and my i2c
>> driver. How to add CONFIG_I2C_CHARDEV? I added it in
>> /target/linux/ramips config file of my board but it hasn't changed
>> anything. How may I check that the config has really been added?
>>
>> By the way, is there a similar CONFIG for SPI, like CONFIG_SPI_CHARDEV ?
>>
>>>
>>>         John
>>> _______________________________________________
>>> openwrt-devel mailing list
>>> openwrt-devel at lists.openwrt.org
>>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
>>
>>
>>
>> --
>> Baptiste
>
>
> Actually, here is my configuration:
> I've got my driver in /sys/bus/i2c/drivers
> Nothing in /sys/bus/i2c/devices
> Nothing in /sys/class/i2c-dev as well.
>
> Concerning CONFIG_I2C_CHARDEV, it seems that it is automatically added
> with i2c-core so it should be compiled in my distrib. (Do you know how
> I can check?)
>
> Cheers,
>
>
> --
> Baptiste

The probleme was not in my driver file but in the adapter file,
i2c-dev.h was not included.

-- 
Baptiste
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel