linux-kernel - Re: [PATCH v3 2/2] tty/serial: atmel: add ISO7816 support

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Date:   Wed, 5 Sep 2018 14:43:41 +0200
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Richard Genoud <richard.genoud@...il.com>,
        <linux-serial@...r.kernel.org>, <linux-arch@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <alexandre.belloni@...tlin.com>, <arnd@...db.de>,
        <gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org>,
        <jslaby@...e.com>
Subject: Re: [PATCH v3 2/2] tty/serial: atmel: add ISO7816 support

Hi Richard,

On Thu, Aug 09, 2018 at 01:30:35PM +0200, Ludovic Desroches wrote:
> Hi Richard,
> 
> On Thu, Aug 09, 2018 at 10:47:17AM +0200, Richard Genoud wrote:
> > Hi !
> > 
> > On 07/08/2018 15:00, Ludovic Desroches wrote:
> > > From: Nicolas Ferre <nicolas.ferre@...rochip.com>
> > > 
> > > When mode is set in atmel_config_iso7816() we backup last RS232 mode
> > > for coming back to this mode if requested.
> > > Also allow setup of T=0 and T=1 parameter and basic support in set_termios
> > > function as well.
> > > 
> > > Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
> > > [ludovic.desroches@...rochip.com: rebase, add check on fidi ratio, checkpatch fixes]
> > > Signed-off-by: Ludovic Desroches <ludovic.desroches@...rochip.com>
> > > ---
> > >  drivers/tty/serial/atmel_serial.c | 211 +++++++++++++++++++++++++++++++++++---
> > >  drivers/tty/serial/atmel_serial.h |   6 +-
> > >  2 files changed, 201 insertions(+), 16 deletions(-)
> > > 
> > > diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
> > > index 8e4428725848..4a7ec44b0ace 100644
> > > --- a/drivers/tty/serial/atmel_serial.c
> > > +++ b/drivers/tty/serial/atmel_serial.c
> 
> [...]
> 
> > >  #if defined(CONFIG_OF)
> > > +static struct atmel_uart_pdata at91rm9200_pdata = {
> > > +	.fidi_min = 1,
> > > +	.fidi_max = 2047,
> > > +};
> > > +
> > > +static struct atmel_uart_pdata at91sam9260_pdata = {
> > > +	.fidi_min = 1,
> > > +	.fidi_max = 2047,
> > > +};
> > > +
> > > +static struct atmel_uart_pdata sama5d3_pdata = {
> > > +	.fidi_min = 3,
> > > +	.fidi_max = 65535,
> > Are you sure this is for sama5d3 ?
> > From the datasheets I have, 65535 is for sama5d4/sama5d2
> 
> I checked it and I missed it. What a pity... In fact, it's a bit more
> tricky since the min value for d3 is 3 and no longer 1.
> 
> > And also, you'll have to s/atmel,at91sam9260-usart/atmel,sama5d2-usart/g
> > in sama5d{2,4}.dtsi
> >
> 
> Yes, I planed to send it later but I can add those patches within this
> set of patches. 
> 
> > But I wonder if it could be detected via ATMEL_US_VERSION instead ?
> > 
> 
> I have not checked, I tend to prefer the compatible string for this kind
> of thing. But as we already use the version number, I can investigate
> this solution if it's the one you prefer.
> 

ping about this question still in suspend in order to prepare a new version.

Regards

Ludovic