提供一个Linux下SPI设备的设备树
时间: 2023-11-30 21:20:59 浏览: 38
节点示例是什么?
我理解了您的问题。下面是一个Linux下SPI设备的设备树节点示例:
spi@b0004000 {
compatible = "spi-gpio"; //设备兼容性
reg = <0xb0004000 0x100>;
#address-cells = <1>;
#size-cells = <0>;
status = "okay"; //节点状态
cs-gpios = <&gpioa 15 GPIO_ACTIVE_LOW>; //从设备片选引脚
num-chipselects = <1>; //片选数量
spi-max-frequency = <1000000>; //SPI时钟频率
clock-names = "spi-gpio", "apb_pclk";
clocks = <&rcc 17>, <&rcc 6>;
pinctrl-0 = <&spi1_gpio_cs>; //GPIO功能配置
pinctrl-names = "default";
spi@0 {
compatible = "w25q32dw"; //SPI设备兼容性
reg = <0>;
spi-max-frequency = <1000000>; //此设备的SPI时钟频率
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "bootloader";
reg = <0x0 0x10000>;
};
partition@10000 {
label = "kernel";
reg = <0x10000 0x200000>;
};
partition@210000 {
label = "rootfs";
reg = <0x210000 0xe00000>;
};
};
};
}
希望这可以回答您的问题。