mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 13:22:23 +00:00
de5c9edee7
This is a LED driver using the PWM on newer SOCs from Atmel; brightness is controlled by changing the PWM duty cycle. So for example if you've set up two leds labeled "pwm0" and "pwm1": echo 0 > /sys/class/leds/pwm2/brightness # off (0%) echo 80 > /sys/class/leds/pwm2/brightness echo 255 > /sys/class/leds/pwm2/brightness # on (100%) Note that "brightness" here isn't linear; maybe that should change. Going from 4 to 8 probably doubles perceived brightness, while 244 to 248 is imperceptible. This is mostly intended to be a simple example of PWM, although it's realistic since LCD backlights are often driven with PWM to conserve battery power (and offer brightness options). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Andrew Victor <linux@maxim.org.za> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
185 lines
5.5 KiB
Plaintext
185 lines
5.5 KiB
Plaintext
menuconfig NEW_LEDS
|
|
bool "LED Support"
|
|
depends on HAS_IOMEM
|
|
help
|
|
Say Y to enable Linux LED support. This allows control of supported
|
|
LEDs from both userspace and optionally, by kernel events (triggers).
|
|
|
|
This is not related to standard keyboard LEDs which are controlled
|
|
via the input system.
|
|
|
|
if NEW_LEDS
|
|
|
|
config LEDS_CLASS
|
|
tristate "LED Class Support"
|
|
help
|
|
This option enables the led sysfs class in /sys/class/leds. You'll
|
|
need this to do anything useful with LEDs. If unsure, say N.
|
|
|
|
comment "LED drivers"
|
|
|
|
config LEDS_ATMEL_PWM
|
|
tristate "LED Support using Atmel PWM outputs"
|
|
depends on LEDS_CLASS && ATMEL_PWM
|
|
help
|
|
This option enables support for LEDs driven using outputs
|
|
of the dedicated PWM controller found on newer Atmel SOCs.
|
|
|
|
config LEDS_CORGI
|
|
tristate "LED Support for the Sharp SL-C7x0 series"
|
|
depends on LEDS_CLASS && PXA_SHARP_C7xx
|
|
help
|
|
This option enables support for the LEDs on Sharp Zaurus
|
|
SL-C7x0 series (C700, C750, C760, C860).
|
|
|
|
config LEDS_LOCOMO
|
|
tristate "LED Support for Locomo device"
|
|
depends on LEDS_CLASS && SHARP_LOCOMO
|
|
help
|
|
This option enables support for the LEDs on Sharp Locomo.
|
|
Zaurus models SL-5500 and SL-5600.
|
|
|
|
config LEDS_SPITZ
|
|
tristate "LED Support for the Sharp SL-Cxx00 series"
|
|
depends on LEDS_CLASS && PXA_SHARP_Cxx00
|
|
help
|
|
This option enables support for the LEDs on Sharp Zaurus
|
|
SL-Cxx00 series (C1000, C3000, C3100).
|
|
|
|
config LEDS_TOSA
|
|
tristate "LED Support for the Sharp SL-6000 series"
|
|
depends on LEDS_CLASS && PXA_SHARPSL
|
|
help
|
|
This option enables support for the LEDs on Sharp Zaurus
|
|
SL-6000 series.
|
|
|
|
config LEDS_S3C24XX
|
|
tristate "LED Support for Samsung S3C24XX GPIO LEDs"
|
|
depends on LEDS_CLASS && ARCH_S3C2410
|
|
help
|
|
This option enables support for LEDs connected to GPIO lines
|
|
on Samsung S3C24XX series CPUs, such as the S3C2410 and S3C2440.
|
|
|
|
config LEDS_AMS_DELTA
|
|
tristate "LED Support for the Amstrad Delta (E3)"
|
|
depends on LEDS_CLASS && MACH_AMS_DELTA
|
|
help
|
|
This option enables support for the LEDs on Amstrad Delta (E3).
|
|
|
|
config LEDS_NET48XX
|
|
tristate "LED Support for Soekris net48xx series Error LED"
|
|
depends on LEDS_CLASS && SCx200_GPIO
|
|
help
|
|
This option enables support for the Soekris net4801 and net4826 error
|
|
LED.
|
|
|
|
config LEDS_WRAP
|
|
tristate "LED Support for the WRAP series LEDs"
|
|
depends on LEDS_CLASS && SCx200_GPIO
|
|
help
|
|
This option enables support for the PCEngines WRAP programmable LEDs.
|
|
|
|
config LEDS_H1940
|
|
tristate "LED Support for iPAQ H1940 device"
|
|
depends on LEDS_CLASS && ARCH_H1940
|
|
help
|
|
This option enables support for the LEDs on the h1940.
|
|
|
|
config LEDS_COBALT_QUBE
|
|
tristate "LED Support for the Cobalt Qube series front LED"
|
|
depends on LEDS_CLASS && MIPS_COBALT
|
|
help
|
|
This option enables support for the front LED on Cobalt Qube series
|
|
|
|
config LEDS_COBALT_RAQ
|
|
bool "LED Support for the Cobalt Raq series"
|
|
depends on LEDS_CLASS && MIPS_COBALT
|
|
select LEDS_TRIGGERS
|
|
help
|
|
This option enables support for the Cobalt Raq series LEDs.
|
|
|
|
config LEDS_HP6XX
|
|
tristate "LED Support for the HP Jornada 6xx"
|
|
depends on LEDS_CLASS && SH_HP6XX
|
|
help
|
|
This option enables led support for the handheld
|
|
HP Jornada 620/660/680/690.
|
|
|
|
config LEDS_GPIO
|
|
tristate "LED Support for GPIO connected LEDs"
|
|
depends on LEDS_CLASS && GENERIC_GPIO
|
|
help
|
|
This option enables support for the LEDs connected to GPIO
|
|
outputs. To be useful the particular board must have LEDs
|
|
and they must be connected to the GPIO lines.
|
|
|
|
config LEDS_CM_X270
|
|
tristate "LED Support for the CM-X270 LEDs"
|
|
depends on LEDS_CLASS && MACH_ARMCORE
|
|
help
|
|
This option enables support for the CM-X270 LEDs.
|
|
|
|
config LEDS_CLEVO_MAIL
|
|
tristate "Mail LED on Clevo notebook (EXPERIMENTAL)"
|
|
depends on LEDS_CLASS && X86 && SERIO_I8042 && DMI && EXPERIMENTAL
|
|
help
|
|
This driver makes the mail LED accessible from userspace
|
|
programs through the leds subsystem. This LED have three
|
|
known mode: off, blink at 0.5Hz and blink at 1Hz.
|
|
|
|
The driver supports two kinds of interface: using ledtrig-timer
|
|
or through /sys/class/leds/clevo::mail/brightness. As this LED
|
|
cannot change it's brightness it blinks instead. The brightness
|
|
value 0 means off, 1..127 means blink at 0.5Hz and 128..255 means
|
|
blink at 1Hz.
|
|
|
|
This module can drive the mail LED for the following notebooks:
|
|
|
|
Clevo D410J
|
|
Clevo D410V
|
|
Clevo D400V/D470V (not tested, but might work)
|
|
Clevo M540N
|
|
Clevo M5x0N (not tested, but might work)
|
|
Positivo Mobile (Clevo M5x0V)
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called leds-clevo-mail.
|
|
|
|
comment "LED Triggers"
|
|
|
|
config LEDS_TRIGGERS
|
|
bool "LED Trigger support"
|
|
help
|
|
This option enables trigger support for the leds class.
|
|
These triggers allow kernel events to drive the LEDs and can
|
|
be configured via sysfs. If unsure, say Y.
|
|
|
|
config LEDS_TRIGGER_TIMER
|
|
tristate "LED Timer Trigger"
|
|
depends on LEDS_TRIGGERS
|
|
help
|
|
This allows LEDs to be controlled by a programmable timer
|
|
via sysfs. Some LED hardware can be programmed to start
|
|
blinking the LED without any further software interaction.
|
|
For more details read Documentation/leds-class.txt.
|
|
|
|
If unsure, say Y.
|
|
|
|
config LEDS_TRIGGER_IDE_DISK
|
|
bool "LED IDE Disk Trigger"
|
|
depends on LEDS_TRIGGERS && BLK_DEV_IDEDISK
|
|
help
|
|
This allows LEDs to be controlled by IDE disk activity.
|
|
If unsure, say Y.
|
|
|
|
config LEDS_TRIGGER_HEARTBEAT
|
|
tristate "LED Heartbeat Trigger"
|
|
depends on LEDS_TRIGGERS
|
|
help
|
|
This allows LEDs to be controlled by a CPU load average.
|
|
The flash frequency is a hyperbolic function of the 1-minute
|
|
load average.
|
|
If unsure, say Y.
|
|
|
|
endif # NEW_LEDS
|