c439003497
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)
OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.
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Run
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LuCI Web Interface: Modern and modular interface to control the device via a web browser.
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OpenWrt Packages: Community repository of ported packages.
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OpenWrt Routing: Packages specifically focused on (mesh) routing.
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OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).
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