linux-kernel - Re: [PATCH v2] tty: serial: msm_serial: Remove duplicate code in msm_console

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Date:	Thu, 08 Jan 2015 13:46:08 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Pramod Gurav <pramod.gurav@...rtplayin.com>
CC:	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-arm-msm@...r.kernel.org,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] tty: serial: msm_serial: Remove duplicate code in
 msm_console_setup

On 01/08/2015 01:15 AM, Pramod Gurav wrote:
>  drivers/tty/serial/msm_serial.c |   15 ---------------
>  1 file changed, 15 deletions(-)
>
> diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
> index c88b522..057008d 100644
> --- a/drivers/tty/serial/msm_serial.c
> +++ b/drivers/tty/serial/msm_serial.c
> @@ -932,27 +932,12 @@ static int __init msm_console_setup(struct console *co, char *options)
>  	if (unlikely(!port->membase))
>  		return -ENXIO;
>  
> -	msm_init_clock(port);
> -

Hm.. doesn't the console setup happen before the port is opened though?
I would think that we need to keep this around so that the clock is
actually enabled before we go and write to hardware registers.

>  	if (options)
>  		uart_parse_options(options, &baud, &parity, &bits, &flow);
>  
>  	bits = 8;
>  	parity = 'n';
>  	flow = 'n';

I wonder if we should leave this here? Maybe we can rely on the user
specifying the right values on the command line?

> -	msm_write(port, UART_MR2_BITS_PER_CHAR_8 | UART_MR2_STOP_BIT_LEN_ONE,
> -		  UART_MR2);	/* 8N1 */
> -
> -	if (baud < 300 || baud > 115200)
> -		baud = 115200;
> -	msm_set_baud_rate(port, baud);
> -
> -	msm_reset(port);
> -
> -	if (msm_port->is_uartdm) {

msm_port is unused now. Please remove it in the same patch.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

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