Enabling SPI on the RK3588: From Kernel Tweaks to User-Space Tests
Hardware Overviwe The RK3588 exposes four native SPI controllers. Each controller can be clocked up to 50 MHz in master mode and supports 8-bit or 16-bit word lengths. The pin mapping is fixed: SPI0_MOSI – GPIO4_B0 SPI0_MISO – GPIO4_B1 SPI0_CLK – GPIO4_B2 SPI0_CS0 – GPIO4_B3 These pins are 3.3 V tol...