Re: [PATCH v2 08/13] tty: serial: atmel: Define GCLK as USART baudrate source clock

[Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>]

On Tue, 6 Sep 2022, Sergiu Moga wrote:

> Define the bit that represents the choice of having GCLK as a baudrate
> source clock inside the USCLKS bitmask of the Mode Register of
> USART IP's.
> 
> Signed-off-by: Sergiu Moga <sergiu.moga@xxxxxxxxxxxxx>
> ---
> 
> 
> v1 -> v2:
> - Nothing, this patch was not here before
> 
> 
> 
>  drivers/tty/serial/atmel_serial.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/atmel_serial.h b/drivers/tty/serial/atmel_serial.h
> index 0d8a0f9cc5c3..70d0611e56fd 100644
> --- a/drivers/tty/serial/atmel_serial.h
> +++ b/drivers/tty/serial/atmel_serial.h
> @@ -49,6 +49,7 @@
>  #define	ATMEL_US_USCLKS		GENMASK(5, 4)	/* Clock Selection */
>  #define		ATMEL_US_USCLKS_MCK		(0 <<  4)
>  #define		ATMEL_US_USCLKS_MCK_DIV8	(1 <<  4)
> +#define		ATMEL_US_USCLKS_GCLK		(2 <<  4)

This would be FIELD_PREP(ATMEL_US_USCLKS, 2) from linux/bitfield.h.

They should all be converted to use FIELD_PREP(), IMHO (in a separate 
patch).

>  #define		ATMEL_US_USCLKS_SCK		(3 <<  4)
>  #define	ATMEL_US_CHRL		GENMASK(7, 6)	/* Character Length */
>  #define		ATMEL_US_CHRL_5			(0 <<  6)
> 

-- 
 i.