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arm64: dts: allwinner: a100: Add LRADC node

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A100/A133 SoCs feature a Low Rate ADC (LRADC) for Key application.

Specs:
- Power supply voltage: 1.8 V
- Reference voltage: 1.35 V
- Interrupt support
- Support Hold Key and General Key
- Support normal, continue and single work mode
- 6-bits resolution, sample rate up to 2 kHz
- Voltage input range between 0 and 1.35 V

Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://patch.msgid.link/20260623204824.691832-6-alexander.sverdlin@gmail.com
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
This commit is contained in:
Alexander Sverdlin 2026-06-23 22:48:17 +02:00 committed by Chen-Yu Tsai
parent 5e5e8a2e5a
commit 8fa3a2bf77
1 changed files with 10 additions and 0 deletions
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10
arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
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@ -466,6 +466,16 @@ ths: thermal-sensor@5070400 {
#thermal-sensor-cells = <1>;
};
lradc: lradc@5070800 {
compatible = "allwinner,sun50i-a100-lradc",
"allwinner,sun50i-r329-lradc";
reg = <0x05070800 0x400>;
interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&ccu CLK_BUS_LRADC>;
resets = <&ccu RST_BUS_LRADC>;
status = "disabled";
};
usb_otg: usb@5100000 {
compatible = "allwinner,sun50i-a100-musb",
"allwinner,sun8i-a33-musb";