您好:
我目前遇到的问题是SPI1挂接LCD设备,驱动程序使用的是spidev修改的,内核版本为4.19.94;
在向SPI写数据的时候内核总是打印spilcd spi1.0: TXFFE timed out和spilcd spi1.0: EOW timed out信息,请问这是什么原因导致的?
附设备树配置:
spi@481a0000 {
compatible = "ti,omap4-mcspi";
#address-cells = <0x1>;
#size-cells = <0x0>;
reg = <0x481a0000 0x400>;
interrupts = <0x7d>;
ti,spi-num-cs = <0x1>;
ti,hwmods = "spi1";
dmas = <0x28 0x2a 0x0 0x28 0x2b 0x0 0x28 0x2c 0x0 0x28 0x2d 0x0>;
dma-names = "tx0", "rx0", "tx1", "rx1";
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <0x58>;
spilcd@0 {
compatible = "spilcd";
spi-max-frequency = <0xc3500>;
reg = <0x0>;
};
};