Thread (34 messages) 34 messages, 5 authors, 2017-01-03

[PATCH v6 3/8] PWM: add pwm-stm32 DT bindings

From: Benjamin Gaignard <hidden>
Date: 2016-12-13 16:29:27
Also in: linux-devicetree, linux-iio, linux-pwm, lkml

2016-12-13 16:57 GMT+01:00 Rob Herring [off-list ref]:
On Tue, Dec 13, 2016 at 5:11 AM, Lee Jones [off-list ref] wrote:
quoted
On Mon, 12 Dec 2016, Rob Herring wrote:
quoted
On Fri, Dec 09, 2016 at 03:15:14PM +0100, Benjamin Gaignard wrote:
quoted
Define bindings for pwm-stm32

version 6:
- change st,breakinput parameter format to make it usuable on stm32f7 too.

version 2:
- use parameters instead of compatible of handle the hardware configuration

Signed-off-by: Benjamin Gaignard <redacted>
---
 .../devicetree/bindings/pwm/pwm-stm32.txt          | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/pwm-stm32.txt
diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
new file mode 100644
index 0000000..866f222
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
@@ -0,0 +1,33 @@
+STMicroelectronics STM32 Timers PWM bindings
+
+Must be a sub-node of an STM32 Timers device tree node.
+See ../mfd/stm32-timers.txt for details about the parent node.
+
+Required parameters:
+- compatible:              Must be "st,stm32-pwm".
+- pinctrl-names:   Set to "default".
+- pinctrl-0:               List of phandles pointing to pin configuration nodes for PWM module.
+                   For Pinctrl properties see ../pinctrl/pinctrl-bindings.txt
+
+Optional parameters:
+- st,breakinput:   Arrays of three u32 <index level filter> to describe break input configurations.
+                   "index" indicates on which break input the configuration should be applied.
+                   "level" gives the active level (0=low or 1=high) for this configuration.
+                   "filter" gives the filtering value to be applied.
+
+Example:
+   timers at 40010000 {
timer at ...
No, it should be timers.
Read the spec. "timer" is a generic node name. "timers" is not. How
many is not relevant.
"timer" is already used in stm32 DT for clocksource node... It is also why
I use "timers" for this.
quoted
The 's' is intentional, since this parent (MFD) device houses 3
different types of timers.  The "timer" node is a child of this one.


-- 
Benjamin Gaignard

Graphic Study Group

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