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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-04 10:25:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-04 10:25:53 -0700
commitf80fa1822d6ccca369578108dc70576cff6c67a0 (patch)
tree52f048d60d00ea6f44c70ef8f4dc0d69247cc8ad /Documentation/leds
parent21f54ddae449f4bdd9f1498124901d67202243d9 (diff)
parent6f3bad9670729ea3a7c78b3752a89c94ffa2397a (diff)
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED driver updates from Jacek Anaszewski: "Three new LED class drivers and some minor fixes and improvementes to the leds-gpio driver, LED Trigger core and documentation" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: leds: triggers: Check return value of kobject_uevent_env() leds: triggers: Return from led_trigger_set() if there is nothing to do leds: gpio: fix and simplify error handling in gpio_leds_create leds: gpio: switch to managed version of led_classdev_register leds: gpio: fix and simplify reading property "label" leds: gpio: simplify gpio_leds_create leds: gpio: add helper cdev_to_gpio_led_data leds: gpio: fix an unhandled error case in create_gpio_led leds: gpio: introduce gpio_blink_set_t leds: add driver for Mellanox systems LEDs Documentation: move oneshot trigger attributes documentation to ABI leds: centralize definition of "default-state" property leds: add PM8058 LEDs driver leds: pm8058: add device tree bindings leds: do not overflow sysfs buffer in led_trigger_show leds: make triggers explicitly non-modular DT: leds: Add bindings for ISSI is31fl319x leds: is31fl319x: 1/3/6/9-channel light effect led driver
Diffstat (limited to 'Documentation/leds')
-rw-r--r--Documentation/leds/leds-mlxcpld.txt110
-rw-r--r--Documentation/leds/ledtrig-oneshot.txt20
2 files changed, 112 insertions, 18 deletions
diff --git a/Documentation/leds/leds-mlxcpld.txt b/Documentation/leds/leds-mlxcpld.txt
new file mode 100644
index 000000000000..a0e8fd457117
--- /dev/null
+++ b/Documentation/leds/leds-mlxcpld.txt
@@ -0,0 +1,110 @@
+Kernel driver for Mellanox systems LEDs
+=======================================
+
+Provide system LED support for the nex Mellanox systems:
+"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
+"msn2410", "msb7800", "msn2740", "msn2100".
+
+Description
+-----------
+Driver provides the following LEDs for the systems "msx6710", "msx6720",
+"msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":
+ mlxcpld:fan1:green
+ mlxcpld:fan1:red
+ mlxcpld:fan2:green
+ mlxcpld:fan2:red
+ mlxcpld:fan3:green
+ mlxcpld:fan3:red
+ mlxcpld:fan4:green
+ mlxcpld:fan4:red
+ mlxcpld:psu:green
+ mlxcpld:psu:red
+ mlxcpld:status:green
+ mlxcpld:status:red
+
+ "status"
+ CPLD reg offset: 0x20
+ Bits [3:0]
+
+ "psu"
+ CPLD reg offset: 0x20
+ Bits [7:4]
+
+ "fan1"
+ CPLD reg offset: 0x21
+ Bits [3:0]
+
+ "fan2"
+ CPLD reg offset: 0x21
+ Bits [7:4]
+
+ "fan3"
+ CPLD reg offset: 0x22
+ Bits [3:0]
+
+ "fan4"
+ CPLD reg offset: 0x22
+ Bits [7:4]
+
+ Color mask for all the above LEDs:
+ [bit3,bit2,bit1,bit0] or
+ [bit7,bit6,bit5,bit4]:
+ [0,0,0,0] = LED OFF
+ [0,1,0,1] = Red static ON
+ [1,1,0,1] = Green static ON
+ [0,1,1,0] = Red blink 3Hz
+ [1,1,1,0] = Green blink 3Hz
+ [0,1,1,1] = Red blink 6Hz
+ [1,1,1,1] = Green blink 6Hz
+
+Driver provides the following LEDs for the system "msn2100":
+ mlxcpld:fan:green
+ mlxcpld:fan:red
+ mlxcpld:psu1:green
+ mlxcpld:psu1:red
+ mlxcpld:psu2:green
+ mlxcpld:psu2:red
+ mlxcpld:status:green
+ mlxcpld:status:red
+ mlxcpld:uid:blue
+
+ "status"
+ CPLD reg offset: 0x20
+ Bits [3:0]
+
+ "fan"
+ CPLD reg offset: 0x21
+ Bits [3:0]
+
+ "psu1"
+ CPLD reg offset: 0x23
+ Bits [3:0]
+
+ "psu2"
+ CPLD reg offset: 0x23
+ Bits [7:4]
+
+ "uid"
+ CPLD reg offset: 0x24
+ Bits [3:0]
+
+ Color mask for all the above LEDs, excepted uid:
+ [bit3,bit2,bit1,bit0] or
+ [bit7,bit6,bit5,bit4]:
+ [0,0,0,0] = LED OFF
+ [0,1,0,1] = Red static ON
+ [1,1,0,1] = Green static ON
+ [0,1,1,0] = Red blink 3Hz
+ [1,1,1,0] = Green blink 3Hz
+ [0,1,1,1] = Red blink 6Hz
+ [1,1,1,1] = Green blink 6Hz
+
+ Color mask for uid LED:
+ [bit3,bit2,bit1,bit0]:
+ [0,0,0,0] = LED OFF
+ [1,1,0,1] = Blue static ON
+ [1,1,1,0] = Blue blink 3Hz
+ [1,1,1,1] = Blue blink 6Hz
+
+Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
+For 3Hz duty cylce is about 167 msec, for 6Hz is about 83 msec.
diff --git a/Documentation/leds/ledtrig-oneshot.txt b/Documentation/leds/ledtrig-oneshot.txt
index 07cd1fa41a3a..fe57474a12e2 100644
--- a/Documentation/leds/ledtrig-oneshot.txt
+++ b/Documentation/leds/ledtrig-oneshot.txt
@@ -21,24 +21,8 @@ below:
echo oneshot > trigger
-This adds the following sysfs attributes to the LED:
-
- delay_on - specifies for how many milliseconds the LED has to stay at
- LED_FULL brightness after it has been armed.
- Default to 100 ms.
-
- delay_off - specifies for how many milliseconds the LED has to stay at
- LED_OFF brightness after it has been armed.
- Default to 100 ms.
-
- invert - reverse the blink logic. If set to 0 (default) blink on for delay_on
- ms, then blink off for delay_off ms, leaving the LED normally off. If
- set to 1, blink off for delay_off ms, then blink on for delay_on ms,
- leaving the LED normally on.
- Setting this value also immediately change the LED state.
-
- shot - write any non-empty string to signal an events, this starts a blink
- sequence if not already running.
+This adds sysfs attributes to the LED that are documented in:
+Documentation/ABI/testing/sysfs-class-led-trigger-oneshot
Example use-case: network devices, initialization: