图1 使能CONFIG_SPI_SPIDEV配置界面 (2)添加SPI从设备的compatible属性值到linux-6.2.8/drivers/spi/spidev.c的spidev_dt_ids[]数组。添加compatible属性值后,则会将SPI从设备创建为/dev/spidevB.C设备节点,供用户空间API使用,其中B为SPI总线编号,C为SPI片选信号编号。 图2 添加SPI从设备的compatible属性值代...
The correct way is to add a compatible string to spidev_dt_ids after drivers/spi/spidev.c:709, but you'll have to find out which string to use instead of "spidev". This is usually in the format "brand,product". Then use this string as compatible string in your device tree and ...
2、配置 imx6q-ecspi 的支持 在drivers/spi/spi-imx.c的static const struct of_device_id spi_imx_dt_ids[];中仿照 { .compatible = "fsl,imx6ul-ecspi", .data = &imx6ul_ecspi_devtype_data, } 添加支持新的设备: { .compatible = "fsl,imx6q-ecspi", .data = &imx6q_ecspi_devtype_dat...
那就添加自己的屏驱动 修改makefile kconfig文件 以便可以选中。按照操作步骤仔细对比代码。还有 没有生成fb0 一定是配置问题!内核根本无法加载设备。后续不用测试。无法加载设备的原因有很多。常见引脚冲突 引脚注册错误,驱动指向错误。驱动未编译进内核,驱动编译了 但是是编译成模块,启动后未加载驱动模块。以及驱动初始...
如果不想编写spi设备驱动,那么linux内核提供了一个通用的spidev设备驱动,提供统一的字符设备操作,那么只需要在应用层读写和控制即可。以SPIOLED为例子,使用spidev驱动OLED,基于linux5.15. 参考源码: tools/spi/spidev_fdx.c tools/spi/spidev_test.c
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fsl,pinmux-ids = < 0x0042 /* MX23_PAD_GPMI_D03__SSP2_DATA4 */ >; fsl,drive-strength = <1>; fsl,voltage = <1>; fsl,pull-up = <1>; }; Now, after boot when I mount devtmpfs, spidev is shown under /dev. The whole system has this SPI stuff: ...
Personal Portfolio. Original coded using Nuxt 3 but I did not like how everything turned out so it is recoded using SvelteKit. The Nuxt 3 version is still available. - spimy.dev/yarn.lock at main · Spimy/spimy.dev
void (*get_rx) (u32 rx_data, struct ids8247_spi *); u32(*get_tx) (struct ids8247_spi *); unsigned int count; int irq; unsigned nsecs; /* (clock cycle time)/2 */ u32 spibrg; /* SPIBRG input clock */ u32 rxindex; ...
MODULE_DEVICE_TABLE(acpi, spidev_acpi_ids); static void spidev_probe_acpi(struct spi_device *spi) { const struct acpi_device_id *id; if (!has_acpi_companion(&spi->dev)) return; id = acpi_match_device(spidev_acpi_ids, &spi->dev); ...