Hi Kevin,
On Thursday 18 April 2013 11:53 PM, Kevin Hilman wrote:
Hi Sourav,
Sourav Poddar<sourav.poddar@xxxxxx> writes:
Hi,
This patch series contains fixes and cleanups around the issue that
the console UART should not idled on suspend while using "no_console_suspend"
in bootargs.
The direction of the series is right, thanks for the updated approach.
I had a comple minor comments on specific patches, but the ordering of
the series needs a little tweaking. It should be
- core/driver changes [current 1-3/6 are ok]
- remove usage from mach-omap2/serial.c (currently part of 4/6)
- remove am33x DT usage (current 5/6 is ok)
- remove entirely from omap_device (omap_device part of 4/6 and 6/6 should be combined)
Thanks a lot for your review and comments.
I have replied to your comments on the respective patches.
Will take care of the "ordering" which you mentioned above
in the next version.
Thanks
Sourav
Kevin
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.
While fixing the above issue, there are other cleanups also done as part of
this series which are no longer required. This cleanups mainly include getting
rid of using "omap_device_disable_idle_on_suspend" api for both dt and non dt case
as the serial driver will be self sufficient to handle the "no_idle_on_suspend" issue.
Serial was the only one making use of "omap_device_disable_idle_on_suspend"
Test info (except drivers: serial: mpc52xx_uart: Remove "uart_console" defintion):
Omap4430sdp:
- Tested wakeup from UART after suspend for dt and non dt case.
Omap5430evm:
- Tested wakeup from UART after suspend for dt case.
There were discussions about how to handle "no_idle_on_suspend" issue and all the
discussions are as follows:
[v3]: https://lkml.org/lkml/2013/4/5/239
[v2]: https://lkml.org/lkml/2013/4/2/350
[v1]: https://lkml.org/lkml/2013/3/18/199
https://lkml.org/lkml/2013/3/18/295
Due to the amount of change in approach and other cleanups coming around it, I am posting
this as a new series.
This patches are based on 3.9-rc3 custom tree which has
Santosh Shilimkar serial patch[1]
[1]: http://permalink.gmane.org/gmane.linux.ports.arm.omap/95828
Cc: Santosh Shilimkar<santosh.shilimkar@xxxxxx>
Cc: Felipe Balbi<balbi@xxxxxx>
Cc: Rajendra nayak<rnayak@xxxxxx>
Sourav Poddar (6):
drivers: tty: serial: Move "uart_console" def to core header file.
drivers: serial: mpc52xx_uart: Remove "uart_console" defintion
driver: serial: omap: add prepare/complete callback for
"no_console_suspend" case
arm: mach-omap2: remove "OMAP_DEVICE_NO_IDLE_ON_SUSPEND" check
arm: dts: am33xx: Remove "ti,no_idle_on_suspend" property.
arm: mach-omap2: Remove "no_console_suspend"
arch/arm/boot/dts/am33xx.dtsi | 1 -
arch/arm/mach-omap2/omap_device.c | 10 +---------
arch/arm/mach-omap2/serial.c | 7 -------
drivers/tty/serial/mpc52xx_uart.c | 10 ----------
drivers/tty/serial/omap-serial.c | 20 ++++++++++++++++++++
drivers/tty/serial/serial_core.c | 6 ------
include/linux/serial_core.h | 6 ++++++
7 files changed, 27 insertions(+), 33 deletions(-)
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