linux-kernel - Re: [PATCH v3 6/6] tty/serial: atmel: changed the driver to work under at91-usart mfd

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Message-ID: <4d70c73e-9db7-bdff-7414-04a4843acae3@sorico.fr>
Date:   Tue, 15 May 2018 15:14:47 +0200
From:   Richard Genoud <richard.genoud@...il.com>
To:     Radu Pirea <radu.pirea@...rochip.com>, devicetree@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-spi@...r.kernel.org
Cc:     mark.rutland@....com, robh+dt@...nel.org, lee.jones@...aro.org,
        gregkh@...uxfoundation.org, jslaby@...e.com,
        alexandre.belloni@...tlin.com, nicolas.ferre@...rochip.com,
        broonie@...nel.org
Subject: Re: [PATCH v3 6/6] tty/serial: atmel: changed the driver to work
 under at91-usart mfd

On 15/05/2018 14:47, Radu Pirea wrote:
> On Mon, 2018-05-14 at 12:57 +0200, Richard Genoud wrote:
>> After your patch, the DMA is not selected anymore:
>> atmel_usart_serial atmel_usart_serial.0.auto: TX channel not
>> available, switch to pio
>> instead of:
>> atmel_usart fffff200.serial: using dma1chan2 for tx DMA transfers
>>
> Fixed.
>> And the kernel doesn't log anymore on the serial console, despite the
>> loglevel=8
>> (after reverting this series, the kernel logs reappears on the serial
>> console)
>>
> Which serial are you using as console? 
fffff200.serial (sam9g35-cm)
( stdout-path = "serial0:115200n8"; in the DTS )

With this series applied, all the kernel log goes on the screen.
Without, it goes on the serial debug.

>> (tests done on sam9g35)
>>
> I will consider the rest of suggestions. 
>> regards,
>> Richard