From mboxrd@z Thu Jan  1 00:00:00 1970
From: b32955@freescale.com (Huang Shijie)
Date: Fri, 28 Jun 2013 13:53:45 +0800
Subject: [PATCH 1/2] serial: imx: remove the uart_console() check
In-Reply-To: <20130628025517.GA11043@S2101-09.ap.freescale.net>
References: <1372239359-4054-1-git-send-email-b32955@freescale.com>
 <20130627141535.GD2695@S2101-09.ap.freescale.net>
 <51CCF24D.1060007@freescale.com>
 <20130628025517.GA11043@S2101-09.ap.freescale.net>
Message-ID: <51CD24E9.6060503@freescale.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

? 2013?06?28? 10:55, Shawn Guo ??:
> On Fri, Jun 28, 2013 at 10:17:49AM +0800, Huang Shijie wrote:
>> We need to set the imx_setUp_ufcr() in our imx_console_setup(),
>> so we need to enable the clocks, aren't we?
> Ah, yes, I missed that.  But register access only needs ipg clock and
> per clock still does not need to be enabled here, right?
yes. we can only enable the ipg clock.
>> In the probe's uart_add_one_port(), we will register the console and
>> call the setup() hook,
>> so it's ok to disable the clocks in the end of the probe.
> Look, here is what you do in .probe().
>
> 	clk_prepare_enable(sport->clk_per);
> 	clk_prepare_enable(sport->clk_ipg);
> 	...
> 	uart_add_one_port(&imx_reg,&sport->port);
> 	...
> 	clk_disable_unprepare(sport->clk_per);
> 	clk_disable_unprepare(sport->clk_ipg);
>
> Since imx_console_setup() will be called in uart_add_one_port() and
> clocks are already being taken care of in imx_console_setup(), why do
> you need all these clock operations here at all?

I will remove all the clock operations in the probe.

thanks for pointing this.


Huang Shijie