Re: [PATCH V4 01/10] bluetooth: hci_bcm: Fix RTS handling during startup

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello Ondrej,

Am 16.12.19 um 20:42 schrieb Ondřej Jirman:
> Hello Stefan,
>
> On Mon, Dec 16, 2019 at 07:28:04PM +0100, Stefan Wahren wrote:
>> Hi Ondrej,
>>
>> sorry, i don't have access to a Orange Pi 3.
>>
>> I looked at a  AP6256 datasheet [1], but i couldn't find any helpful
>> information about flow control during power up.
>>
>> Are you able to analyze this issue more further before we revert this patch?
> I'd like to, but I'll not be able to attach logic probe to the AP6256
> module. It's too fine pitch for soldering.
this the same issue, i had with the Raspberry Pi 4 :-(
> I may try setting CTS/RTS to gpio/input mode and grab the capture of
> the GPIO port states in time to see what's happening during probe
> of bt_bcm module.
>
> I don't really understand what effect your patch is supposed to have
> on the CTS/RTS lines during power up from the commit description.
> Can you please explain it more concretely?
I hope a picture explain more than thousand words. Please look at figure
7 at page 22 of the datasheet [2]. The patch tries to achieve the proper
timing of BT_UART_CTS_N.
>
> I'll be able to get to playing with this after the holidays.

Okay

Stefan

[2] -
https://www.verical.com/datasheet/cypress-semiconductor-combo-wireless-module-cyw43455xkubgt-5770595.pdf





[Index of Archives]     [Bluez Devel]     [Linux Wireless Networking]     [Linux Wireless Personal Area Networking]     [Linux ATH6KL]     [Linux USB Devel]     [Linux Media Drivers]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Big List of Linux Books]

  Powered by Linux