On Saturday 27 April 2013 01:34 AM, Sourav Poddar wrote:
Hi,
This patch series contains fixes around the issue that
the console UART should not idled on suspend while using
"no_console_suspend" in bootargs.
The approach thought of is to modify the serial core/serial driver to bypass
runtime PM if the UART in contention is a console and we are using
"no_console_suspend"
in our bootargs.
There were discussions about how to handle "no_idle_on_suspend" issue and all
the
discussions are as follows:
https://lkml.org/lkml/2013/4/5/239
https://lkml.org/lkml/2013/4/2/350
https://lkml.org/lkml/2013/3/18/199
https://lkml.org/lkml/2013/3/18/295
Due to the amount of change in approach, I am posting
this as a new series.
v4->v5
1. Add comments
2. Formatting.
v3->v4
1. check for console in runtime api.
v2->v3
1. Use "-EBUSY" for no_console_suspend case
2. Bypass runtime PM only during suspend
3. Improve the commit log based on community suggestion.
v1->v2
1. Remove the prepare/complete callback.
2. Adapt runtime PM callback to deal with the issue.
3. Fold patch(1,2) of previous series into 1.
4. Reordered the patch.
5. Change $subject and chage log for few patches.
Cc: Santosh Shilimkar<santosh.shilim...@ti.com>
Cc: Felipe Balbi<ba...@ti.com>
Cc: Rajendra nayak<rna...@ti.com>
Test info
Omap4430sdp:
- Tested wakeup from UART after suspend for dt and non dt case.
Omap5430evm:
- Tested wakeup from UART after suspend for dt case.
These patches were the part of the bigger series[1]. Breaking them into
two relevant series as they go through the different tree.
[1]: http://lkml.org/lkml/2013/4/26/274
This patches are based on 3.9-rc8
The following changes since commit 824282ca7d250bd7c301f221c3cd902ce906d731:
Merge branch 'upstream' of
git://git.linux-mips.org/pub/scm/ralf/upstream-linus (2013-04-22 15:00:59 -0700)
are available in the git repository at:
git://gitorious.org/linux-connectivity/linux-connectivity.git serial_fix
Sourav Poddar (2):
driver: tty: serial: Move "uart_console" def to core header file.
driver: serial: omap: prevent runtime PM for "no_console_suspend"
drivers/tty/serial/mpc52xx_uart.c | 10 ----------
drivers/tty/serial/omap-serial.c | 34 +++++++++++++++++++++++++++++++++-
drivers/tty/serial/serial_core.c | 6 ------
include/linux/serial_core.h | 7 +++++++
4 files changed, 40 insertions(+), 17 deletion
Discard this cover..resend the cover with correct subject.
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