spi-gpio-custom 的便利就在于可动态配置SPI总线,不需“修改dts文件、编译系统”的繁琐操作。也就是说,通过spi-gpio-custom使用spi时,dts文件中可以没有任何spi功能的定义。 常规的一个屏幕接口引脚定义 配置举例 配置一个ID为1的总线,使用GPIO3作为CLK,GPIO4作为MOSI,GPIO5作为MISO,在SPI模式0下工作、最大频率...
参考驱动的Document/devicetree/bindings/pinctrl/pinctrl-mcp23s08.txt 配置DTS dts 配置在spi 下挂着MCP23S08 设备 qspi: spi@e000d000 { clock-names = "ref_clk", "pclk"; clocks = <&clkc 10>, <&clkc 43>; compatible = "xlnx,zynq-qspi-1.0"; status = "disabled";interrupt-parent= <&int...
dts中buswidth =<8>;的值改成9应该就是9bit了 成功! 修改了buswidth= <9>之后。现在st7701s芯片可以被gpio模拟的spi成功初始化。这里设置了一个demo让屏幕显示黑白棋盘。 离线 楼主 #4 2021-11-01 16:06:46 分享评论 HongSang 会员 注册时间: 2021-08-12 已发帖子: 42 积分: 16.5 Re: 求助 F1C1...
3 使用spi-gpio-custom模块配置SPI总线 spi-gpio-custom 的便利就在于可动态配置SPI总线,不需“修改dts文件、编译系统”的繁琐操作。也就是说,通过spi-gpio-custom使用spi时,dts文件中可以没有任何spi功能的定义。 配置举例 配置一个ID为1的总线,使用GPIO3作为CLK,GPIO4作为MOSI,GPIO5作为MISO,在SPI模式0下工作...
在板级主要的设备树文件 arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts: &pio { ... spi0_cs_pins: spi0_cs_pins { pins = "PC3", "PA6"; function = "gpio_out"; }; }; &spi0 { /* needed to avoid dtc warning */ #address-cells = <1>; #size-cells = <0>; status...
TI__Guru***161600points Hi Burim, Sorry for the delayed response. In general it is possible to use gpio as SPI CS, but this will not happen just with modifying the dts. You need to modify (significantly) the spi-omap2-mcspi.c driver logic as well. Currently it does not allow the...
TEGRA_GPIO(C, 2) 0 TEGRA_GPIO(C, 3) 0 TEGRA_GPIO(C, 4) 0 >; It seems you don’t need to configure for the above configurations. I would suggest you configuring the pinmux through pinmux spreadsheet instead of modifying them in dts file....
dts. I cant remember what exactly the issue was as intially spi-ili9341-tft.dts did not work when compiled under 5.15.88. I have since recompiled it and it now does indeed work mostly, the only bit I need to address is getting the backlight to come on automatically which it does on...
pr_info("%s uses legacy open drain flag - update the DTS if you can\n", of_node_full_name(np)); } /* * Legacy handling of SPI active high chip select. If we have a * property named "cs-gpios" we need to inspect the child node * to determine if the flags should have inver...
学习Linux设备树,基于高通SDM450芯片,分析GPIO,I2C,SPI,UART。_LinuxDTS 上传者:qq_46187594时间:2024-09-02 FT311D Android APK FT311D--Android USB to UART/GPIO/I2C/SPI interface FT311D 接口芯片为Android手机或平板电脑提供了USB转外部UART、GPIO、PWM、I2C、SPI硬件接口功能。实验表明,基于FT311D的Androi...