riscv: dts: thead: Enable WiFi on Lichee Pi 4A

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The Lichee Pi 4A has an RTL8723DS WiFi module connected to the TH1520
SDIO1 controller. The module reset line is driven through a PCA9557 GPIO
expander on the I2C1 bus.

Enable I2C1 for the GPIO expander and configure SDIO1 as a non-removable
4-bit SDIO bus using an mmc-pwrseq-simple reset sequence so the WiFi
device can be powered and enumerated.

Signed-off-by: MoeLeak <i@leak.moe>
Signed-off-by: Drew Fustini <fustini@kernel.org>

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MoeLeak 2026-05-08 19:44:14 +08:00 • committed by Drew Fustini

parent 2f60e35163

commit a20241c083

1 changed files with 47 additions and 0 deletions

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arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts

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