linux-kernel - Re: [PATCH 2/8] tty: serial: fsl

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Date:	Sat, 11 Jun 2016 22:03:41 +0800
From:	Shawn Guo <shawnguo@...nel.org>
To:	Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
Cc:	gregkh@...uxfoundation.org, linux-serial@...r.kernel.org,
	mturquette@...libre.com, sboyd@...eaurora.org,
	linux-kernel@...r.kernel.org, stefan@...er.ch,
	kernel@...gutronix.de, jslaby@...e.com, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/8] tty: serial: fsl_lpuart: support suspend/resume

On Thu, Jun 09, 2016 at 08:40:33PM +0530, Bhuvanchandra DV wrote:
> From: Stefan Agner <stefan@...er.ch>
> 
> In order to allow wake support in STOP sleep mode, clocks are
> needed. Use imx_clk_gate2_cgr to disable automatic clock gating
> in low power mode STOP. This allows to enable wake by UART using:
> echo enabled > /sys/class/tty/ttyLP0/power/wakeup
> 
> However, if wake is not enabled, the driver should disable the
> clocks explicitly to save power.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  drivers/clk/imx/clk-vf610.c     | 12 ++++++------

Please send clock driver changes in a separate patch.

Shawn

>  drivers/tty/serial/fsl_lpuart.c | 16 ++++++++++++++--
>  2 files changed, 20 insertions(+), 8 deletions(-)