summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/counter/stm32-lptimer-cnt.txt
diff options
context:
space:
mode:
authorSascha Hauer <s.hauer@pengutronix.de>2019-06-05 00:06:30 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-06-11 09:11:11 +0200
commit796af3473b8222bcd89aa63e9886c355a6baf95d (patch)
treead357b2756bda409b46747faaaf57a0ffd003c9c /dts/Bindings/counter/stm32-lptimer-cnt.txt
parent649b9ebcf53d697277bcdb01334dbcd563a33aa8 (diff)
downloadbarebox-796af3473b8222bcd89aa63e9886c355a6baf95d.tar.gz
barebox-796af3473b8222bcd89aa63e9886c355a6baf95d.tar.xz
dts: update to v5.2-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/counter/stm32-lptimer-cnt.txt')
-rw-r--r--dts/Bindings/counter/stm32-lptimer-cnt.txt29
1 files changed, 29 insertions, 0 deletions
diff --git a/dts/Bindings/counter/stm32-lptimer-cnt.txt b/dts/Bindings/counter/stm32-lptimer-cnt.txt
new file mode 100644
index 000000000..e90bc47f7
--- /dev/null
+++ b/dts/Bindings/counter/stm32-lptimer-cnt.txt
@@ -0,0 +1,29 @@
+STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter
+
+STM32 Low-Power Timer provides several counter modes. It can be used as:
+- quadrature encoder to detect angular position and direction of rotary
+ elements, from IN1 and IN2 input signals.
+- simple counter from IN1 input signal.
+
+Must be a sub-node of an STM32 Low-Power Timer device tree node.
+See ../mfd/stm32-lptimer.txt for details about the parent node.
+
+Required properties:
+- compatible: Must be "st,stm32-lptimer-counter".
+- pinctrl-names: Set to "default". An additional "sleep" state can be
+ defined to set pins in sleep state.
+- pinctrl-n: List of phandles pointing to pin configuration nodes,
+ to set IN1/IN2 pins in mode of operation for Low-Power
+ Timer input on external pin.
+
+Example:
+ timer@40002400 {
+ compatible = "st,stm32-lptimer";
+ ...
+ counter {
+ compatible = "st,stm32-lptimer-counter";
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&lptim1_in_pins>;
+ pinctrl-1 = <&lptim1_sleep_in_pins>;
+ };
+ };