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openwrt/package/kernel/leds-gca230718/Makefile

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filogic: Add LED driver for GCA230718 Add basic support for the LED driver for GCA230718. - I didn't find any documentation or driver for it, so the information below is purely based on my investigations - If there is already I driver for it, please tell me. Maybe I didn't search enough - I implemented a kernel module (leds-gca230718) to access the LEDs via DTS - The LED controller supports PWM for brightness control and ramp control for smooth blinking. This is not implemented in the driver - The LED controller supports toggling (on -> off -> on -> off) where the brightness of the LEDs can be set individually for each on cycle - Until now, only simple active/inactive control is implemented (like when the LEDs would have been connected via GPIO) - Controlling the LEDs requires three sequences sent to the chip. Each sequence consists of - A reset command (0x81 0xE4) written to register 0x00 - A control command (for example 0x0C 0x02 0x01 0x00 0x00 0x00 0xFF 0x01 0x00 0x00 0x00 0xFF 0x87 written to register 0x03) - The reset command is always the same - In the control command - byte 0 is always the same - byte 1 (0x02 in the example above) must be changed in every sequence: 0x02 -> 0x01 -> 0x03) - byte 2 is set to 0x01 which disables toggling. 0x02 would be LED toggling without ramp control, 0x03 would be toggling with ramp control - byte 3 to 6 define the brightness values for the LEDs (R,G,B,W) for the first on cycle when toggling - byte 7 defines the toggling frequency (if toggling enabled) - byte 8 to 11 define the brightness values for the LEDs (R,G,B,W) for the second on cycle when toggling - byte 12 is constant 0x87 Signed-off-by: Roland Reinl <reinlroland+github@gmail.com> (cherry picked from commit 0682974aa8da4855ca373d195cb6365913fc1f8e)
2023-12-26 07:31:15 +00:00
#
# Copyright (C) 2008-2010 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=leds-gca230718
PKG_RELEASE:=1
PKG_LICENSE:=GPL-2.0
include $(INCLUDE_DIR)/package.mk
define KernelPackage/leds-gca230718
SUBMENU:=LED modules
TITLE:=GCA230718 LED support (e.g. for D-Link M30)
FILES:= \
$(PKG_BUILD_DIR)/leds-gca230718.ko
AUTOLOAD:=$(call AutoProbe,leds-gca230718,1)
DEPENDS:=@TARGET_mediatek_filogic
endef
define KernelPackage/leds-gca230718/description
GCA230718 LED support (e.g. for D-Link M30) using I2C.
endef
define Build/Compile
$(KERNEL_MAKE) M="$(PKG_BUILD_DIR)" modules
endef
$(eval $(call KernelPackage,leds-gca230718))
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