Re: Some problems about FruDevice in the entity-manager

[Henbin Chang <henbinchang@gmail.com>]

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Hi Vijay,
Currently, I bypass the 8/16bit checking to try dbus-sensor.

I just followed your suggestion and only changed the one line.
But I couldn't find the fru device under the tree of
/xyz/openbmc_project/FruDevice/

There was the below error message in the journal.
Mar 26 08:17:56 henbin fru-device[1111]: failed to format fru for device at
bus 6address 50

Please let me know if you want to try other.

BRs.
Henbin.

Vijay Khemka <vijaykhemka@fb.com> 於 2019年3月26日 週二 上午7:05寫道：

> Hi Henbin,
>
> I am assuming your device is 16 bit and in your last email you said 16bit
> check is failing. If that check fails then following code will not get
> executed. Also while loop is same as i2c_smbus_read_i2c_block_data().
>
>
>
> I would suggest one thing, if your 16bit check is passing and still you
> don’t see fru device, please make only one line change below and test.
>
>     int ret = i2c_smbus_write_byte_data(file, high_addr, low_addr);
>
>     //int ret = i2c_smbus_write_byte_data(file, 0, low_addr);
>
>
>
> Please let me know result.
>
>
>
> Regards
>
> -Vijay
>
>
>
>
>
> *From: *Henbin Chang <henbinchang@gmail.com>
> *Date: *Sunday, March 24, 2019 at 6:39 PM
> *To: *Vijay Khemka <vijaykhemka@fb.com>
> *Cc: *James Feist <james.feist@linux.intel.com>, OpenBMC Maillist <
> openbmc@lists.ozlabs.org>
> *Subject: *Re: Some problems about FruDevice in the entity-manager
>
>
>
> Thanks for your response.
>
>
>
> I also encountered another problem.
>
>
>
> That's,  I found the content of 16-bit EEPROM through the combination of
> the SMBUS APIs was not incorrect.
>
>
>
>     /* This is for 16 bit addressing EEPROM device. First an offset
>
>      * needs to be written before read data from a offset
>
>      */
>
>     int ret = i2c_smbus_write_byte_data(file, 0, low_addr);
>
>     if (ret < 0)
>
>     {
>
>         return ret;
>
>     }
>
>
>
>     return i2c_smbus_read_i2c_block_data(file, high_addr, len, buf);
>
>
>
> So I referred to i2c-tools to modify them.
>
> And then I could see my FRU under the tree of
> 'xyz/openbmc_project/FruDevice/'
>
>
>
>     int ret = i2c_smbus_write_byte_data(file, high_addr, low_addr);
>
>     //int ret = i2c_smbus_write_byte_data(file, 0, low_addr);
>
>     if (ret < 0)
>
>     {
>
>         return ret;
>
>     }
>
>     while (index < len){
>
> buf[index] = i2c_smbus_read_byte(file);
>
> index++;
>
>     }
>
>
>
>     //return i2c_smbus_read_i2c_block_data(file, high_addr, len, buf);
>
>     return len;
>
>
>
> Let me know if you have any comments.
>
>
>
> Thanks.
>

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