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generic: add STMicroelectronics LED1202 driver

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This LED controller has a driver under development which is currently being reviewed by the respective kernel maintainers. They are currently on v11 which is included here.

The LED1202 is a 12-channel low quiescent current LED driver with:
  * Supply range from 2.6 V to 5 V
  * 20 mA current capability per channel
  * 1.8 V compatible I2C control interface
  * 8-bit analog dimming individual control
  * 12-bit local PWM resolution
  * 8 programmable patterns

If the led node is present in the controller then the channel is
set to active.

The output current can be adjusted separately for each channel by 8-bit
analog (current sink input) and 12-bit digital (PWM) dimming control. The
LED1202 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 (on 4096 steps). Analog dimming (on 256 steps) is per channel but
common to all patterns. Each device tree LED node will have a corresponding
entry in /sys/class/leds with the label name. The brightness property
corresponds to the per channel analog dimming, while the patterns[1-8] to the
PWM dimming control.

Signed-off-by: Manuel Fombuena <fombuena@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/17451
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Manuel Fombuena
2025-01-01 20:42:37 +00:00
committed by Robert Marko
parent 70610a5240
commit 8925c469f4
6 changed files with 716 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
target/linux/ath79/patches-6.6/800-leds-add-reset-controller-based-driver.patch
View File

@@ -13,7 +13,7 @@ Signed-off-by: John Crispin <john@phrozen.org>
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -901,6 +901,17 @@ source "drivers/leds/flash/Kconfig"
@@ -911,6 +911,17 @@ source "drivers/leds/flash/Kconfig"
comment "RGB LED drivers"
source "drivers/leds/rgb/Kconfig"
@@ -176,7 +176,7 @@ Signed-off-by: John Crispin <john@phrozen.org>
+MODULE_ALIAS("platform:leds-reset");
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -88,6 +88,7 @@ obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds
@@ -89,6 +89,7 @@ obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o