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[1/3,v3] Documentation:leds: Add leds-st1202.rst

Message ID 20241105161041.4813-1-vicentiu.galanopulo@remote-tech.co.uk
State New
Headers show
Series [1/3,v3] Documentation:leds: Add leds-st1202.rst | expand

Commit Message

Vicentiu Galanopulo Nov. 5, 2024, 4:10 p.m. UTC 
Add usage for sysfs hw_pattern entry for leds-st1202

Signed-off-by: Vicentiu Galanopulo <vicentiu.galanopulo@remote-tech.co.uk>
---
 - Changes in v3: Add leds-st1202 to index.rst
 - Changes in v2: Implement review comments
---
 Documentation/leds/index.rst       |  1 +
 Documentation/leds/leds-st1202.rst | 36 ++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 Documentation/leds/leds-st1202.rst
diff mbox series

Patch

diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst
index 3ade16c18328..0ab0a2128a11 100644
--- a/Documentation/leds/index.rst
+++ b/Documentation/leds/index.rst
@@ -28,4 +28,5 @@  LEDs
    leds-mlxcpld
    leds-mt6370-rgb
    leds-sc27xx
+   leds-st1202.rst
    leds-qcom-lpg
diff --git a/Documentation/leds/leds-st1202.rst b/Documentation/leds/leds-st1202.rst
new file mode 100644
index 000000000000..e647966e496c
--- /dev/null
+++ b/Documentation/leds/leds-st1202.rst
@@ -0,0 +1,36 @@ 
+.. SPDX-License-Identifier: GPL-2.0
+
+============================================
+Kernel driver for STMicroelectronics LED1202
+============================================
+
+/sys/class/leds/<led>/hw_pattern
+--------------------------------
+
+Specify a hardware pattern for the ST1202 LED. The LED
+controller implements 12 low-side current generators
+with independent dimming control. Internal volatile memory
+allows the user to store up to 8 different patterns.
+Each pattern is a particular output configuration in terms
+of PWM duty-cycle and duration (ms).
+
+To be compatible with the hardware pattern
+format, maximum 8 tuples of brightness (PWM) and duration must
+be written to hw_pattern.
+
+- Min pattern duration: 22 ms
+- Max pattern duration: 5660 ms
+
+The format of the hardware pattern values should be:
+"brightness duration brightness duration ..."
+
+/sys/class/leds/<led>/repeat
+----------------------------
+
+Specify a pattern repeat number, which is common for all channels.
+Default is 1; negative numbers and 0 are invalid.
+
+This file will always return the originally written repeat number.
+
+When the 255 value is written to it, all patterns will repeat
+indefinitely.