linux-kernel - Re: [PATCH] serial: 8250_pci: Fix EXAR feature control register constants

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Date:   Tue, 7 Feb 2017 13:01:21 +0100
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] serial: 8250_pci: Fix EXAR feature control register
 constants

On 2017-02-07 12:55, Andy Shevchenko wrote:
> +Cc Sudip
> 
> On Fri, Feb 3, 2017 at 3:22 PM, Jan Kiszka <jan.kiszka@...mens.com> wrote:
>> According to the XR17V352 manual, bit 4 is IrDA control and bit 5 for
>> 485. Fortunately, no driver used them so far.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
>> ---
>>  include/uapi/linux/serial_reg.h | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
>> index b4c0484..b1f60cb 100644
>> --- a/include/uapi/linux/serial_reg.h
>> +++ b/include/uapi/linux/serial_reg.h
>> @@ -366,8 +366,8 @@
>>  #define UART_EXAR_DVID         0x8d    /* Device identification */
>>
>>  #define UART_EXAR_FCTR         0x08    /* Feature Control Register */
>> -#define UART_FCTR_EXAR_IRDA    0x08    /* IrDa data encode select */
>> -#define UART_FCTR_EXAR_485     0x10    /* Auto 485 half duplex dir ctl */
>> +#define UART_FCTR_EXAR_IRDA    0x10    /* IrDa data encode select */
>> +#define UART_FCTR_EXAR_485     0x20    /* Auto 485 half duplex dir ctl */
>>  #define UART_FCTR_EXAR_TRGA    0x00    /* FIFO trigger table A */
>>  #define UART_FCTR_EXAR_TRGB    0x60    /* FIFO trigger table B */
>>  #define UART_FCTR_EXAR_TRGC    0x80    /* FIFO trigger table C */
> 
> 
> 

BTW, I recalled that Greg preferred to remove these regs from uapi. Once
I'm done with moving the fastcom exar code over to 8250_exar.c
(currently compiling...), I'll also write a patch to move these defines
in the same file.

Jan

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