[PATCH v20 07/17] dt: bindings: lp55xx: Update binding for Multicolor Framework
From: Dan Murphy
Date: Thu Apr 23 2020 - 12:02:27 EST
Update the DT binding to include the properties to use the
multicolor framework for the devices that use the LP55xx
framework.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
CC: Tony Lindgren <tony@xxxxxxxxxxx>
CC: "BenoÃt Cousson" <bcousson@xxxxxxxxxxxx>
CC: Linus Walleij <linus.walleij@xxxxxxxxxx>
CC: Shawn Guo <shawnguo@xxxxxxxxxx>
CC: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
CC: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
CC: Fabio Estevam <festevam@xxxxxxxxx>
CC: NXP Linux Team <linux-imx@xxxxxxx>
---
.../devicetree/bindings/leds/leds-lp55xx.txt | 149 +++++++++++++++---
1 file changed, 124 insertions(+), 25 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
index bfe2805c5534..0ccc1efc2499 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
@@ -1,6 +1,8 @@
Binding for TI/National Semiconductor LP55xx LED Drivers
Required properties:
+- #address-cells: 1
+- #size-cells: 0
- compatible: one of
national,lp5521
national,lp5523
@@ -14,6 +16,18 @@ Required properties:
Each child has own specific current settings
- led-cur: Current setting at each LED channel (mA x10, 0 if LED is not connected)
- max-cur: Maximun current at each LED channel.
+- reg: Output channel for the LED. This is zero based channel identifier and
+ the data sheet is a one based channel identifier.
+ reg value to output to LED output number
+ D1 = reg value is 0
+ D2 = reg value is 1
+ D3 = reg value is 2
+ D4 = reg value is 3
+ D5 = reg value is 4
+ D6 = reg value is 5
+ D7 = reg value is 6
+ D8 = reg value is 7
+ D9 = reg value is 8
Optional properties:
- enable-gpio: GPIO attached to the chip's enable pin
@@ -35,23 +49,28 @@ example 1) LP5521
on channel 0.
lp5521@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "national,lp5521";
reg = <0x32>;
label = "lp5521_pri";
clock-mode = /bits/ 8 <2>;
- chan0 {
+ chan@0 {
+ reg = <0>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
linux,default-trigger = "heartbeat";
};
- chan1 {
+ chan@1 {
+ reg = <1>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
@@ -70,59 +89,70 @@ ASEL1 ASEL0 Address
VEN VEN 35h
lp5523@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "national,lp5523";
reg = <0x32>;
clock-mode = /bits/ 8 <1>;
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan4 {
+ chan@4 {
+ reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan5 {
+ chan@5 {
+ reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan6 {
+ chan@6 {
+ reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan7 {
+ chan@7 {
+ reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan8 {
+ chan@8 {
+ reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
@@ -133,29 +163,35 @@ example 3) LP5562
4 channels are defined.
lp5562@30 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "ti,lp5562";
reg = <0x30>;
clock-mode = /bits/8 <2>;
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "R";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "G";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "B";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "W";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
@@ -167,62 +203,125 @@ example 4) LP8501
Others are same as LP5523.
lp8501@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "ti,lp8501";
reg = <0x32>;
clock-mode = /bits/ 8 <2>;
pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan4 {
+ chan@4 {
+ reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan5 {
+ chan@5 {
+ reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan6 {
+ chan@6 {
+ reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan7 {
+ chan@7 {
+ reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan8 {
+ chan@8 {
+ reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
};
+
+Multicolor Framework Support
+In addition to the nodes and properties defined above for device support the
+properties below are needed for multicolor framework support as defined in
+Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
+
+Required child properties for multicolor framework
+ - color : Must be LED_COLOR_ID_MULTI
+ - function : see Documentation/devicetree/bindings/leds/common.txt
+
+Required grandchildren properties
+ - reg : This is the LED output of the device
+ - color : see Documentation/devicetree/bindings/leds/common.txt
+
+Multicolor LED example:
+led-controller@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "national,lp5523";
+ reg = <0x32>;
+ clock-mode = /bits/ 8 <0>; /* LP55XX_CLOCK_AUTO */
+
+ multi-led@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_STANDBY;
+ linux,default-trigger = "heartbeat";
+
+ led@0 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x0>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@1 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x1>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+
+ led@6 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x6>;
+ color = <LED_COLOR_ID_RED>;
+ };
+ };
+};
--
2.25.1