Re: [PATCH] serial: Do not treat the IIR register as a bitfield

[Vignesh R]

On Thursday 30 March 2017 12:13 PM, Olliver Schinagl wrote:
> 
> 
> On March 30, 2017 8:15:29 AM CEST, Vignesh R <vigneshr@xxxxxx> wrote:
>> Hi,
>>
>> On Thursday 30 March 2017 12:14 AM, Olliver Schinagl wrote:
>>> diff --git a/include/uapi/linux/serial_reg.h
>> b/include/uapi/linux/serial_reg.h
>>> index 5db76880b4ad..489522389a10 100644
>>> --- a/include/uapi/linux/serial_reg.h
>>> +++ b/include/uapi/linux/serial_reg.h
>>> @@ -31,18 +31,18 @@
>>>  #define UART_IERX_SLEEP		0x10 /* Enable sleep mode */
>>>  
>>>  #define UART_IIR	2	/* In:  Interrupt ID Register */
>>> -#define UART_IIR_NO_INT		0x01 /* No interrupts pending */
>>> -#define UART_IIR_ID		0x0e /* Mask for the interrupt ID */
>>>  #define UART_IIR_MSI		0x00 /* Modem status interrupt */
>>> +#define UART_IIR_NO_INT		0x01 /* No interrupts pending */
>>>  #define UART_IIR_THRI		0x02 /* Transmitter holding register empty */
>>>  #define UART_IIR_RDI		0x04 /* Receiver data interrupt */
>>>  #define UART_IIR_RLSI		0x06 /* Receiver line status interrupt */
>>> -
>>>  #define UART_IIR_BUSY		0x07 /* DesignWare APB Busy Detect */
>>> +#define UART_IIR_RX_TIMEOUT	0x0c /* DesignWare RX Timeout interrupt
>> */
> It was moved due to sorting. The comment could be changed maybe? I renamed it from omap to dw as i believe the omap also uses the dw ip. But i think it is a defacto standard mapping of the irr register?

AFAIK, OMAP UART does not use DW core, please make these IDs generic to
avoid confusion.

> 
>>> +#define UART_IIR_MASK		0x0f /* DesignWare IIR mask */
>>>  
>>> -#define UART_IIR_RX_TIMEOUT	0x0c /* OMAP RX Timeout interrupt */
>>
>> You are removing UART_IIR_RX_TIMEOUT? Is this intended?
>>
>>>  #define UART_IIR_XOFF		0x10 /* OMAP XOFF/Special Character */
>>>  #define UART_IIR_CTS_RTS_DSR	0x20 /* OMAP CTS/RTS/DSR Change */
>>> +#define UART_IIR_EXT_MASK	0x30 /* OMAP extended IIR mask */
> 

-- 
Regards
Vignesh