[RFC PATCH linux dev-4.7 4/6] misc: Add Aspeed BT IPMI BMC driver

Cédric Le Goater clg at kaod.org
Thu Sep 15 21:22:50 AEST 2016

On 09/15/2016 12:51 PM, Patrick Williams wrote:
> On Thu, Sep 15, 2016 at 10:36:46AM +0200, Cédric Le Goater wrote:
>>>> I'm not sure there. When I open /dev/ttyUSB0 I'm talking to the USB0
>>>> serial device. When I open /dev/mtd0, I'm talking to the mtd0 device.
>>>> So when I open /dev/ipmi-bt-bmc, I would expect to talk to the BMC
>>>> device?
>>> Yes. I went a little too far in the global rename. /dev/ipmi-bt-bmc makes 
>> I meant /dev/ipmi-bt-host ! :)
> Does it make sense to have these numbered?  I thought Brenden proposed
> an emulated bt-over-i2c.  We could also conceive of an SOC that had
> multiple LPC (+bt) engines to facilitate multiple nodes, or an off-board
> FPGA to do it.

If we expect to have multiple btbridged process running, we will 
need multiple device nodes. How we should name them depends partly 
on the driver I think. 

We could keep the prefix 'ipmi-bt' because it identifies the BT 
interface described in the IPMI specs and use node /dev/ipmi-bt-host 
for the original bt_bmc, (used be bt_host) driver. This one will be 

The others could use : 



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