summaryrefslogtreecommitdiff
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 14:33:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 14:33:13 -0700
commit5f9cc57036165bbd96f3a432fd2569c812503a92 (patch)
tree950466c2a3fa8d1723d51d766549f7cbb9897f1e /Documentation
parentcd7b34fe1c2d93c54b368c295de88612c0b7120b (diff)
parent1591caf2d5eafdfb3b300691f8f99e5bb97d5406 (diff)
downloadlwn-5f9cc57036165bbd96f3a432fd2569c812503a92.tar.gz
lwn-5f9cc57036165bbd96f3a432fd2569c812503a92.zip
Merge tag 'leds_for_4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED updates from Jacek Anaszewski: "LED class drivers improvements: leds-pca955x: - add Device Tree support and bindings - use devm_led_classdev_register() - add GPIO support - prevent crippled LED class device name - check for I2C errors leds-gpio: - add optional retain-state-shutdown DT property - allow LED to retain state at shutdown leds-tlc591xx: - merge conditional tests - add missing of_node_put leds-powernv: - delete an error message for a failed memory allocation in powernv_led_create() leds-is31fl32xx.c - convert to using custom %pOF printf format specifier Constify attribute_group structures in: - leds-blinkm - leds-lm3533 Make several arrays static const in: - leds-aat1290 - leds-lp5521 - leds-lp5562 - leds-lp8501" * tag 'leds_for_4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: leds: pca955x: check for I2C errors leds: gpio: Allow LED to retain state at shutdown dt-bindings: leds: gpio: Add optional retain-state-shutdown property leds: powernv: Delete an error message for a failed memory allocation in powernv_led_create() leds: lp8501: make several arrays static const leds: lp5562: make several arrays static const leds: lp5521: make several arrays static const leds: aat1290: make array max_mm_current_percent static const leds: pca955x: Prevent crippled LED device name leds: lm3533: constify attribute_group structure dt-bindings: leds: add pca955x leds: pca955x: add GPIO support leds: pca955x: use devm_led_classdev_register leds: pca955x: add device tree support leds: Convert to using %pOF instead of full_name leds: blinkm: constify attribute_group structures. leds: tlc591xx: add missing of_node_put leds: tlc591xx: merge conditional tests
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/leds/leds-gpio.txt3
-rw-r--r--Documentation/devicetree/bindings/leds/leds-pca955x.txt88
2 files changed, 91 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-gpio.txt b/Documentation/devicetree/bindings/leds/leds-gpio.txt
index 76535ca37120..a48dda268f81 100644
--- a/Documentation/devicetree/bindings/leds/leds-gpio.txt
+++ b/Documentation/devicetree/bindings/leds/leds-gpio.txt
@@ -18,6 +18,9 @@ LED sub-node properties:
see Documentation/devicetree/bindings/leds/common.txt
- retain-state-suspended: (optional) The suspend state can be retained.Such
as charge-led gpio.
+- retain-state-shutdown: (optional) Retain the state of the LED on shutdown.
+ Useful in BMC systems, for example when the BMC is rebooted while the host
+ remains up.
- panic-indicator : (optional)
see Documentation/devicetree/bindings/leds/common.txt
diff --git a/Documentation/devicetree/bindings/leds/leds-pca955x.txt b/Documentation/devicetree/bindings/leds/leds-pca955x.txt
new file mode 100644
index 000000000000..7984efb767b4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-pca955x.txt
@@ -0,0 +1,88 @@
+* NXP - pca955x LED driver
+
+The PCA955x family of chips are I2C LED blinkers whose pins not used
+to control LEDs can be used as general purpose I/Os. The GPIO pins can
+be input or output, and output pins can also be pulse-width controlled.
+
+Required properties:
+- compatible : should be one of :
+ "nxp,pca9550"
+ "nxp,pca9551"
+ "nxp,pca9552"
+ "nxp,pca9553"
+- #address-cells: must be 1
+- #size-cells: must be 0
+- reg: I2C slave address. depends on the model.
+
+Optional properties:
+- gpio-controller: allows pins to be used as GPIOs.
+- #gpio-cells: must be 2.
+- gpio-line-names: define the names of the GPIO lines
+
+LED sub-node properties:
+- reg : number of LED line.
+ from 0 to 1 for the pca9550
+ from 0 to 7 for the pca9551
+ from 0 to 15 for the pca9552
+ from 0 to 3 for the pca9553
+- type: (optional) either
+ PCA9532_TYPE_NONE
+ PCA9532_TYPE_LED
+ PCA9532_TYPE_GPIO
+ see dt-bindings/leds/leds-pca955x.h (default to LED)
+- label : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Examples:
+
+pca9552: pca9552@60 {
+ compatible = "nxp,pca9552";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x60>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15";
+
+ gpio@12 {
+ reg = <12>;
+ type = <PCA955X_TYPE_GPIO>;
+ };
+ gpio@13 {
+ reg = <13>;
+ type = <PCA955X_TYPE_GPIO>;
+ };
+ gpio@14 {
+ reg = <14>;
+ type = <PCA955X_TYPE_GPIO>;
+ };
+ gpio@15 {
+ reg = <15>;
+ type = <PCA955X_TYPE_GPIO>;
+ };
+
+ led@0 {
+ label = "red:power";
+ linux,default-trigger = "default-on";
+ reg = <0>;
+ type = <PCA955X_TYPE_LED>;
+ };
+ led@1 {
+ label = "green:power";
+ reg = <1>;
+ type = <PCA955X_TYPE_LED>;
+ };
+ led@2 {
+ label = "pca9552:yellow";
+ reg = <2>;
+ type = <PCA955X_TYPE_LED>;
+ };
+ led@3 {
+ label = "pca9552:white";
+ reg = <3>;
+ type = <PCA955X_TYPE_LED>;
+ };
+};