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b67893206f
linux-next/drivers/leds
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Milo Kim b67893206f leds:lp55xx: fix firmware loading error 
LP55xx driver uses not firmware file but raw data to load program through
the firmware interface.(Documents/leds/leds-lp55xx.txt)

  For example, here is how to run blinking green channel pattern.
  (The second engine is seleted and MUX is mapped to 'RGB' mode)
  echo 2 > /sys/bus/i2c/devices/xxxx/select_engine
  echo "RGB" > /sys/bus/i2c/devices/xxxx/engine_mux
  echo 1 > /sys/class/firmware/lp5562/loading
  echo "4000600040FF6000" > /sys/class/firmware/lp5562/data
  echo 0 > /sys/class/firmware/lp5562/loading
  echo 1 > /sys/bus/i2c/devices/xxxx/run_engine

However, '/sys/class/firmware/<device name>' is not created after the
firmware loader user helper was introduced.
This feature is used in the case below.

  As soon as the firmware download is requested by the driver, firmware
  class subsystem tries to find the binary file.
  If it gets failed, then it just falls back to user helper to load
  raw data manually. Here, you can see the device file under
  /sys/class/firmware/.

To make it happen, LP55xx driver requires two configurations.

  1. Enable CONFIG_FW_LOADER_USER_HELPER_FALLBACK in Kconfig
  2. Set option, 'FW_OPT_USERHELPER' on requesting the firmware data.
     It means the second option should be 'false' in
     request_firmware_nowait().
     This option enables to load firmware data manually by calling
     fw_load_from_user_helper().

Cc: linux-leds@vger.kernel.org
Signed-off-by: Milo Kim <milo.kim@ti.com>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2015-06-29 10:10:57 -07:00
..
trigger leds: Add support for setting brightness in a synchronous way 2014-11-14 14:29:35 -08:00
dell-led.c dell-led: add mic mute led interface 2014-05-08 14:28:07 +08:00
Kconfig leds:lp55xx: fix firmware loading error 2015-06-29 10:10:57 -07:00
led-class-flash.c leds: flash: Remove synchronized flash strobe feature 2015-03-09 17:16:23 -07:00
led-class.c leds: fix brightness changing when software blinking is active 2015-05-25 13:26:47 -07:00
led-core.c leds: fix brightness changing when software blinking is active 2015-05-25 13:26:47 -07:00
led-triggers.c leds: implement sysfs interface locking mechanism 2014-11-14 14:29:35 -08:00
leds-88pm860x.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-aat1290.c leds: aat1290: pass flags parameter to devm_gpiod_get 2015-06-22 13:57:24 -07:00
leds-adp5520.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-asic3.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-bcm6328.c leds: add BCM6328 LED driver 2015-05-04 11:22:28 -07:00
leds-bcm6358.c leds: add BCM6358 LED driver 2015-05-25 13:26:48 -07:00
leds-bd2802.c leds: Remove duplicated OOM message for individual driver 2014-05-08 14:28:08 +08:00
leds-blinkm.c leds: blinkm: remove unnecessary spaces 2014-02-27 10:19:57 -08:00
leds-clevo-mail.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-cobalt-qube.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-cobalt-raq.c drivers/leds: don't use module_init in non-modular leds-cobalt-raq.c 2015-06-22 13:57:09 -07:00
leds-da903x.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-da9052.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-dac124s085.c leds: dac124s085: Remove redundant spi_set_drvdata 2013-10-22 10:57:34 -07:00
leds-fsg.c drivers/leds: delete non-required instances of include <linux/init.h> 2014-02-27 09:56:56 -08:00
leds-gpio-register.c led: gpio: Fix possible ZERO_SIZE_PTR pointer dereferencing error. 2014-09-29 10:21:01 -07:00
leds-gpio.c leds: leds-gpio: Add missing #include <linux/of.h> 2015-05-25 13:26:45 -07:00
leds-hp6xx.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-ipaq-micro.c leds: ipaq-micro: fix sparse non static symbol warning 2014-07-29 10:57:20 -07:00
leds-ktd2692.c leds: ktd2692: pass flags parameter to devm_gpiod_get 2015-06-22 13:57:16 -07:00
leds-lm355x.c leds: lm355x: fix attribute-creation race 2014-06-25 15:10:54 -07:00
leds-lm3530.c leds: lm3550: fix attribute-creation race 2014-06-25 15:00:55 -07:00
leds-lm3533.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-lm3642.c leds: lm3642: fix attribute-creation race 2014-06-25 15:13:08 -07:00
leds-locomo.c drivers/leds: Add module.h to files using it implicitly 2011-10-31 19:31:49 -04:00
leds-lp55xx-common.c leds:lp55xx: fix firmware loading error 2015-06-29 10:10:57 -07:00
leds-lp55xx-common.h leds: lp55xx: add common macros for device attributes 2013-08-26 17:22:12 -07:00
leds-lp3944.c leds: lp3944: fix sparse warning 2014-09-11 16:55:27 -07:00
leds-lp5521.c drivers/leds: delete non-required instances of include <linux/init.h> 2014-02-27 09:56:56 -08:00
leds-lp5523.c leds: lp5523: add master_fader support 2015-05-25 13:26:46 -07:00
leds-lp5562.c leds: lp5562: remove unnecessary parentheses 2014-02-27 10:17:15 -08:00
leds-lp8501.c leds: lp8501: Fix typo in MODULE_DESCRIPTION in leds-lp8501.c 2015-03-30 11:55:51 -07:00
leds-lp8788.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-lp8860.c leds: lp8860: Fix typo in MODULE_DESCRIPTION in leds-lp8860.c 2015-03-30 11:55:51 -07:00
leds-lt3593.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-max8997.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-max77693.c leds: max77693: add support for V4L2 Flash sub-device 2015-06-22 13:55:17 -07:00
leds-mc13783.c leds: leds-mc13783: Use of_get_child_by_name() instead of refcount hack 2015-01-14 10:40:20 -08:00
leds-menf21bmc.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-net48xx.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-netxbig.c leds: netxbig: fix oops at probe time 2015-01-13 13:49:01 -08:00
leds-ns2.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-ot200.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-pca955x.c leds: use dev_get_platdata() 2013-08-26 17:22:11 -07:00
leds-pca963x.c leds: pca963x: Add missing initialiation of struct led_info.flags 2015-03-30 11:55:48 -07:00
leds-pca9532.c driver:gpio remove all usage of gpio_remove retval in driver 2014-09-18 11:03:10 -07:00
leds-pm8941-wled.c leds: add Qualcomm PM8941 WLED driver 2015-03-30 11:55:49 -07:00
leds-pwm.c leds: leds-pwm: drop one pwm_get_period() call 2015-02-24 11:42:18 -08:00
leds-rb532.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-regulator.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-12-15 18:28:25 -08:00
leds-s3c24xx.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-ss4200.c leds: ss4200: fix attribute-creation race 2014-06-25 15:34:24 -07:00
leds-sunfire.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-syscon.c leds: syscon: handle multiple syscon instances 2014-11-14 14:29:35 -08:00
leds-tca6507.c driver:gpio remove all usage of gpio_remove retval in driver 2014-09-18 11:03:10 -07:00
leds-tlc591xx.c leds: tlc591xx: Driver for the TI 8/16 Channel i2c LED driver 2015-05-04 11:05:54 -07:00
leds-versatile.c ARM/leds: move ARM Versatile LED driver to leds subsystem 2014-03-28 10:54:15 +01:00
leds-wm831x-status.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-wm8350.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds-wrap.c leds: drop owner assignment from platform_drivers 2014-10-20 16:20:43 +02:00
leds.h leds: unify the location of led-trigger API 2015-05-04 11:05:55 -07:00
Makefile leds: add BCM6358 LED driver 2015-05-25 13:26:48 -07:00