[PATCH 2/2] serial: msm: Add support for UARTDM cores

David Brown davidb at codeaurora.org
Wed Jan 19 12:31:55 EST 2011

On Wed, Jan 19 2011, Jamie Iles wrote:

>> @@ -38,9 +40,20 @@ struct msm_port {
>>  	struct uart_port	uart;
>>  	char			name[16];
>>  	struct clk		*clk;
>> +	struct clk		*pclk;
>>  	unsigned int		imr;
>> +	unsigned int            *gsbi_base;
>> +	int			is_dm;
>> +	unsigned int		old_snap_state;
>>  };
> Out of interest, what does .is_dm mean?  Is that obvious to someone who 
> knows about msm?

It would be clear to people rather familiar with the chip, but I agree
it's probably not that clear of a name.

We have two UART blocks we use in the MSMs, the older one, supported by
this driver before this change, and a newer one that was designed to
work with our DMA engine (known as the Data Mover, or dm).  This newer
UART can be used in a somewhat compatible manner when being used for
serial-port type operations.

I'm not sure what would be a better name for the flag, though.  The
block is called UARTDM.


Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

More information about the linux-arm-kernel mailing list