Thread (15 messages) 15 messages, 5 authors, 2016-06-28

[PATCH 2/8] tty: serial: fsl_lpuart: support suspend/resume

From: stefan@agner.ch (Stefan Agner)
Date: 2016-06-14 02:42:20
Also in: linux-clk, linux-serial, lkml


On June 13, 2016 5:18:19 PM PDT, Bhhuvanchandra DV [off-list ref] wrote:
Hi Shawn,

On 06/11/2016 02:03 PM, Shawn Guo wrote:
quoted
On Thu, Jun 09, 2016 at 08:40:33PM +0530, Bhuvanchandra DV wrote:
quoted
From: Stefan Agner <stefan@agner.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@agner.ch>
---
  drivers/clk/imx/clk-vf610.c     | 12 ++++++------
Please send clock driver changes in a separate patch.
The changes are dependet on each other, hence I put it in a single patch. But since it is a new feature it shouldn't really matter...
How about splitting this patchset to two? few patches are having minor
fixes and the few patches might need some review and discussions.
May be some thing like DMA fixes and the other minor fixes.
I don't think that splitting up the patchset is necessary, with the current order it is possible to pick up the fixes independently...

--
Stefan
--
Bhuvan
quoted
Shawn
quoted
  drivers/tty/serial/fsl_lpuart.c | 16 ++++++++++++++--
  2 files changed, 20 insertions(+), 8 deletions(-)
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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