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 linux-next 20120330 and build successfully for all the machines. Test ledtrig-cpu driver on OMAP4 Panda board. -- root@omap4430-panda:~# dmesg | grep trig [ 1.891265] LED trigger cpu0 indicate activity on CPU 0 [ 1.896728] LED trigger cpu1 indicate activity on CPU 1 root@omap4430-panda:~# cat /sys/class/leds/pandaboard\:\:status1/trigger none nand-disk mmc0 mmc1 timer [heartbeat] cpu0 cpu1 root@omap4430-panda:~# cat /sys/class/leds/pandaboard\:\:status2/trigger none nand-disk [mmc0] mmc1 timer heartbeat cpu0 cpu1 root@omap4430-panda:~# echo cpu0 > /sys/class/leds/pandaboard\:\:status1/trigger root@omap4430-panda:~# cat /sys/class/leds/pandaboard\:\:status1/trigger none nand-disk mmc0 mmc1 timer heartbeat [cpu0] cpu1 root@omap4430-panda:~# echo cpu1 > /sys/class/leds/pandaboard\:\:status2/trigger root@omap4430-panda:~# 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 v4 --> v5: * rebase all the patches on top of latest linux-next * replace on_each_cpu() with for_each_possible_cpu() * add some description of ledtrig_cpu() API * remove old leds code from driver nwflash.c, which should use a new led trigger then * this trigger driver can be built as module now 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 Bryan Wu (18): led-triggers: create a trigger for CPU activity ARM: at91: convert old leds drivers to gpio_led and led_trigger drivers ARM: mach-realview and mach-versatile: retire custom LED code ARM: mach-ks8695: remove leds driver, since nobody use it ARM: mach-shark: retire custom LED code ARM: mach-orion5x: convert custom LED code to gpio_led and LED CPU trigger ARM: mach-integrator: move CM_CTRL to header file for accessing by other functions ARM: mach-integrator: retire custom LED code ARM: mach-clps711x: retire custom LED code of P720T machine ARM: mach-ebsa110: retire custom LED code ARM: mach-footbridge: retire custom LED code char: nwflash: remove old led event code ARM: mach-pxa: retire custom LED code ARM: plat-samsung: remove including old leds event API header file ARM: mach-pnx4008: remove including old leds event API header file ARM: mach-omap1: retire custom LED code ARM: mach-sa1100: retire custom LED code ARM: use new LEDS CPU trigger stub to replace old one arch/arm/Kconfig | 53 ----- arch/arm/include/asm/leds.h | 50 ----- arch/arm/kernel/Makefile | 1 - arch/arm/kernel/leds.c | 121 ----------- arch/arm/kernel/process.c | 6 +- arch/arm/kernel/time.c | 17 -- 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/common.c | 1 - arch/arm/mach-clps711x/include/mach/time.h | 2 - arch/arm/mach-clps711x/p720t-leds.c | 66 ------ arch/arm/mach-clps711x/p720t.c | 59 +++++ arch/arm/mach-ebsa110/Makefile | 4 +- arch/arm/mach-ebsa110/leds.c | 79 +++++--- arch/arm/mach-footbridge/Makefile | 4 - arch/arm/mach-footbridge/ebsa285-leds.c | 138 ------------ arch/arm/mach-footbridge/ebsa285.c | 79 +++++++ arch/arm/mach-footbridge/netwinder-hw.c | 110 +++++++++-- arch/arm/mach-footbridge/netwinder-leds.c | 138 ------------ 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 | 158 +++++++++------ 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 | 92 -------- arch/arm/mach-omap1/Makefile | 8 - arch/arm/mach-omap1/board-h2.c | 32 +++ arch/arm/mach-omap1/board-h3.c | 32 +++ arch/arm/mach-omap1/board-osk.c | 33 +++ arch/arm/mach-omap1/leds-h2p2-debug.c | 166 --------------- arch/arm/mach-omap1/leds-innovator.c | 98 --------- arch/arm/mach-omap1/leds-osk.c | 113 ---------- 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 | 72 ++----- 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 | 115 ---------- arch/arm/mach-pxa/leds-lubbock.c | 124 ----------- arch/arm/mach-pxa/leds-mainstone.c | 119 ----------- 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 | 5 - arch/arm/mach-realview/realview_pb1176.c | 5 - arch/arm/mach-realview/realview_pb11mp.c | 5 - arch/arm/mach-realview/realview_pba8.c | 5 - arch/arm/mach-realview/realview_pbx.c | 5 - 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 | 113 ---------- arch/arm/mach-sa1100/leds-badge4.c | 110 ---------- arch/arm/mach-sa1100/leds-cerf.c | 109 ---------- arch/arm/mach-sa1100/leds-hackkit.c | 111 ---------- arch/arm/mach-sa1100/leds-lart.c | 100 --------- 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 | 226 ++++++++------------ arch/arm/mach-versatile/core.c | 5 - arch/arm/plat-omap/Kconfig | 3 +- arch/arm/plat-omap/debug-leds.c | 293 ++++++-------------------- arch/arm/plat-samsung/time.c | 1 - arch/arm/plat-versatile/Kconfig | 4 +- arch/arm/plat-versatile/leds.c | 13 +- drivers/char/nwflash.c | 34 --- drivers/leds/Kconfig | 10 + drivers/leds/Makefile | 1 + drivers/leds/ledtrig-cpu.c | 138 ++++++++++++ include/linux/leds.h | 23 ++ 97 files changed, 1410 insertions(+), 2989 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 -- 1.7.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html