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Gmane
From: Bryan Wu <bryan.wu <at> canonical.com>
Subject: [PATCH v4 00/18] Introduce a led trigger for CPU activity and consolidate LED driver in ARM
Newsgroups: gmane.linux.ports.arm.kernel
Date: Friday 26th August 2011 09:03:17 UTC (over 5 years ago)
Based on Linus Walleij's ARM LED consolidation work, this patchset
introduce a
new generic led trigger for CPU not only for ARM but also for others.

For enabling CPU idle event, CPU arch code should call ledtrig_cpu() stub
to
trigger idle start or idle end event.

These patches convert old style LED driver in arch/arm to gpio_led or new
led
driver interface. Against 3.1-rc3 and build successfully for all the
machines.

Test ledtrig-cpu driver on OMAP4 Panda board.
--
[email protected]:~# uname -a
Linux omap4430-panda 3.1.0-rc1-07641-gb154376 #1 SMP Wed Aug 10 18:26:24
CST 2011 armv7l unknown
[email protected]:~# dmesg | grep trig
[    1.891265] LED trigger cpu0 indicate activity on CPU 0
[    1.896728] LED trigger cpu1 indicate activity on CPU 1
[email protected]:~# cat /sys/class/leds/pandaboard\:\:status1/trigger
none nand-disk mmc0 mmc1 timer [heartbeat] cpu0 cpu1
[email protected]:~# cat /sys/class/leds/pandaboard\:\:status2/trigger
none nand-disk [mmc0] mmc1 timer heartbeat cpu0 cpu1
[email protected]:~# echo cpu0 >
/sys/class/leds/pandaboard\:\:status1/trigger
[email protected]:~# cat /sys/class/leds/pandaboard\:\:status1/trigger
none nand-disk mmc0 mmc1 timer heartbeat [cpu0] cpu1
[email protected]:~# echo cpu1 >
/sys/class/leds/pandaboard\:\:status2/trigger
[email protected]:~# cat /sys/class/leds/pandaboard\:\:status2/trigger
none nand-disk mmc0 mmc1 timer heartbeat cpu0 [cpu1]

Then try some heavy task like dd and use taskset to assign the task to a
specific CPU,
LED will turn on or off as expect
--

Please find these patches here:
	git://kernel.ubuntu.com/roc/linux-2.6/.git
leds

v3 --> v4:
 * fix a typo pointed by Jochen Friedrich
 * fix some building errors
 * add Reviewed-by and Tested-by into patch log

v2 --> v3:
 * almost rewrote the whole ledtrig-cpu driver, which is more simple
 * every CPU will have a per-CPU trigger
 * cpu trigger can be assigned to any leds
 * fix a lockdep issue in led-trigger common code
 * other fix according to review

v1 --> v2:
 * remove select operations in Kconfig of every machines
 * add back supporting of led in core module of mach-integrator
 * solidate name scheme in ledtrig-cpu.c
 * add comments of CPU_LED_* cpu led events
 * fold patches of RealView and Versatile together
 * add machine_is_ check during assabet led driver init
 * add some Acked-by in patch logs
 * remove code for simpad machine in machine-sa11000, since Jochen
Friedrich
 introduced gpiolib and gpio-led driver for simpad
 * on Assabet and Netwinder machine, LED operations is reversed like:
 setting bit means turn off leds
 clearing bit means turn on leds
 * add a new function to read CM_CTRL register for led driver

This patchset is based on patches from Jochen Friedrich for simpad, which
are 7024/1, 7025/1, 7026/1, and 7027/1 in Russell's patch system.

Bryan Wu (17):
  led-triggers: use atomic kzalloc during led trigger registering
  led-triggers: create a trigger for CPU activity
  arm: at91: convert old leds drivers to gpio_led and led_trigger
    drivers
  mach-ks8695: remove leds driver, since nobody use it
  mach-shark: retire custom LED code
  mach-orion5x: convert custom LED code to gpio_led and LED CPU trigger
  mach-integrator: move CM_CTRL to header file for accessing by other
    functions
  mach-integrator: retire custom LED code
  mach-clps711x: retire custom LED code of P720T machine
  mach-ebsa110: retire custom LED code
  mach-footbridge: retire custom LED code
  mach-pxa: retire custom LED code
  plat-samsung: remove including old leds event API header file
  mach-pnx4008: remove including old leds event API header file
  mach-omap1: retire custom LED code
  mach-sa1100: retire custom LED code
  ARM: use new LEDS CPU trigger stub to replace old one

Linus Walleij (1):
  mach-realview and mach-versatile: retire custom LED code

 arch/arm/Kconfig                               |   53 -----
 arch/arm/include/asm/leds.h                    |   50 ----
 arch/arm/kernel/Makefile                       |    1 -
 arch/arm/kernel/leds.c                         |  119 ----------
 arch/arm/kernel/process.c                      |    6 +-
 arch/arm/kernel/time.c                         |   17 --
 arch/arm/mach-at91/board-cap9adk.c             |   21 ++-
 arch/arm/mach-at91/board-csb337.c              |    3 -
 arch/arm/mach-at91/board-ecbat91.c             |   18 ++-
 arch/arm/mach-at91/board-eco920.c              |   23 ++-
 arch/arm/mach-at91/board-kafa.c                |   17 ++-
 arch/arm/mach-at91/board-kb9202.c              |   23 ++-
 arch/arm/mach-at91/board-rm9200dk.c            |    3 -
 arch/arm/mach-at91/board-rm9200ek.c            |    3 -
 arch/arm/mach-at91/board-sam9-l9260.c          |   23 ++-
 arch/arm/mach-at91/board-sam9261ek.c           |    3 -
 arch/arm/mach-at91/board-yl-9200.c             |    3 -
 arch/arm/mach-at91/include/mach/board.h        |    1 -
 arch/arm/mach-at91/leds.c                      |  105 ---------
 arch/arm/mach-clps711x/Makefile                |    2 -
 arch/arm/mach-clps711x/include/mach/time.h     |    2 -
 arch/arm/mach-clps711x/p720t-leds.c            |   67 ------
 arch/arm/mach-clps711x/p720t.c                 |   60 +++++
 arch/arm/mach-clps711x/time.c                  |    1 -
 arch/arm/mach-ebsa110/Makefile                 |    4 +-
 arch/arm/mach-ebsa110/leds.c                   |   80 ++++---
 arch/arm/mach-footbridge/Makefile              |    4 -
 arch/arm/mach-footbridge/ebsa285-leds.c        |  139 -----------
 arch/arm/mach-footbridge/ebsa285.c             |   79 +++++++
 arch/arm/mach-footbridge/include/mach/system.h |    1 -
 arch/arm/mach-footbridge/netwinder-hw.c        |  110 ++++++++--
 arch/arm/mach-footbridge/netwinder-leds.c      |  139 -----------
 arch/arm/mach-integrator/Makefile              |    3 +-
 arch/arm/mach-integrator/core.c                |    3 -
 arch/arm/mach-integrator/include/mach/cm.h     |    2 +
 arch/arm/mach-integrator/leds.c                |  159 ++++++++-----
 arch/arm/mach-ks8695/Makefile                  |    3 -
 arch/arm/mach-ks8695/devices.c                 |   21 --
 arch/arm/mach-ks8695/include/mach/devices.h    |    5 -
 arch/arm/mach-ks8695/leds.c                    |   93 --------
 arch/arm/mach-omap1/Makefile                   |    8 -
 arch/arm/mach-omap1/board-h2.c                 |   34 +++-
 arch/arm/mach-omap1/board-h3.c                 |   34 +++-
 arch/arm/mach-omap1/board-osk.c                |   33 +++
 arch/arm/mach-omap1/leds-h2p2-debug.c          |  167 --------------
 arch/arm/mach-omap1/leds-innovator.c           |   99 --------
 arch/arm/mach-omap1/leds-osk.c                 |  115 ----------
 arch/arm/mach-omap1/leds.c                     |   69 ------
 arch/arm/mach-omap1/leds.h                     |    3 -
 arch/arm/mach-omap1/time.c                     |    1 -
 arch/arm/mach-omap1/timer32k.c                 |    1 -
 arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c   |    1 -
 arch/arm/mach-orion5x/rd88f5181l-ge-setup.c    |    1 -
 arch/arm/mach-orion5x/rd88f5182-setup.c        |   74 ++----
 arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c   |    1 -
 arch/arm/mach-pnx4008/time.c                   |    1 -
 arch/arm/mach-pxa/Makefile                     |    8 -
 arch/arm/mach-pxa/idp.c                        |   79 +++++++
 arch/arm/mach-pxa/leds-idp.c                   |  116 ----------
 arch/arm/mach-pxa/leds-lubbock.c               |  125 ----------
 arch/arm/mach-pxa/leds-mainstone.c             |  120 ----------
 arch/arm/mach-pxa/leds.c                       |   32 ---
 arch/arm/mach-pxa/leds.h                       |   13 -
 arch/arm/mach-pxa/lubbock.c                    |   93 ++++++++
 arch/arm/mach-pxa/mainstone.c                  |   92 ++++++++
 arch/arm/mach-realview/core.c                  |   39 ----
 arch/arm/mach-realview/core.h                  |    2 -
 arch/arm/mach-realview/realview_eb.c           |    4 -
 arch/arm/mach-realview/realview_pb1176.c       |    4 -
 arch/arm/mach-realview/realview_pb11mp.c       |    4 -
 arch/arm/mach-realview/realview_pba8.c         |    4 -
 arch/arm/mach-realview/realview_pbx.c          |    4 -
 arch/arm/mach-sa1100/Makefile                  |    9 -
 arch/arm/mach-sa1100/assabet.c                 |   83 +++++++
 arch/arm/mach-sa1100/badge4.c                  |   30 +++
 arch/arm/mach-sa1100/cerf.c                    |   42 ++++
 arch/arm/mach-sa1100/hackkit.c                 |   32 +++
 arch/arm/mach-sa1100/lart.c                    |   26 ++
 arch/arm/mach-sa1100/leds-assabet.c            |  114 ---------
 arch/arm/mach-sa1100/leds-badge4.c             |  111 ---------
 arch/arm/mach-sa1100/leds-cerf.c               |  110 ---------
 arch/arm/mach-sa1100/leds-hackkit.c            |  112 ---------
 arch/arm/mach-sa1100/leds-lart.c               |  101 --------
 arch/arm/mach-sa1100/leds.c                    |   50 ----
 arch/arm/mach-sa1100/leds.h                    |   13 -
 arch/arm/mach-shark/Makefile                   |    4 +-
 arch/arm/mach-shark/core.c                     |    1 -
 arch/arm/mach-shark/leds.c                     |  227 +++++++-----------
 arch/arm/mach-versatile/core.c                 |   42 ----
 arch/arm/plat-omap/Kconfig                     |    3 +-
 arch/arm/plat-omap/debug-leds.c                |  292
++++++------------------
 arch/arm/plat-samsung/time.c                   |    1 -
 arch/arm/plat-versatile/Kconfig                |    2 +-
 arch/arm/plat-versatile/leds.c                 |   13 +-
 drivers/leds/Kconfig                           |   10 +
 drivers/leds/Makefile                          |    1 +
 drivers/leds/led-triggers.c                    |    2 +-
 drivers/leds/ledtrig-cpu.c                     |  120 ++++++++++
 include/linux/leds.h                           |   15 ++
 99 files changed, 1406 insertions(+), 3010 deletions(-)
 delete mode 100644 arch/arm/include/asm/leds.h
 delete mode 100644 arch/arm/kernel/leds.c
 delete mode 100644 arch/arm/mach-clps711x/p720t-leds.c
 delete mode 100644 arch/arm/mach-footbridge/ebsa285-leds.c
 delete mode 100644 arch/arm/mach-footbridge/netwinder-leds.c
 delete mode 100644 arch/arm/mach-ks8695/leds.c
 delete mode 100644 arch/arm/mach-omap1/leds-h2p2-debug.c
 delete mode 100644 arch/arm/mach-omap1/leds-innovator.c
 delete mode 100644 arch/arm/mach-omap1/leds-osk.c
 delete mode 100644 arch/arm/mach-omap1/leds.c
 delete mode 100644 arch/arm/mach-omap1/leds.h
 delete mode 100644 arch/arm/mach-pxa/leds-idp.c
 delete mode 100644 arch/arm/mach-pxa/leds-lubbock.c
 delete mode 100644 arch/arm/mach-pxa/leds-mainstone.c
 delete mode 100644 arch/arm/mach-pxa/leds.c
 delete mode 100644 arch/arm/mach-pxa/leds.h
 delete mode 100644 arch/arm/mach-sa1100/leds-assabet.c
 delete mode 100644 arch/arm/mach-sa1100/leds-badge4.c
 delete mode 100644 arch/arm/mach-sa1100/leds-cerf.c
 delete mode 100644 arch/arm/mach-sa1100/leds-hackkit.c
 delete mode 100644 arch/arm/mach-sa1100/leds-lart.c
 delete mode 100644 arch/arm/mach-sa1100/leds.c
 delete mode 100644 arch/arm/mach-sa1100/leds.h
 create mode 100644 drivers/leds/ledtrig-cpu.c

-- 
1.7.5
 
CD: 5ms