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 = <&...
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...
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...
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 use of gpio as CS. ...
打开board.dts,找到twi0的功能配置,修改twi0状态为status= “okay”; 最后,重新编译烧写即可。 SPI 一、确认SPI 1需要的引脚 在核心板原理图中搜索SPI1, 可以看到spi1需要用到PH5,PH6,PH7,PH8,还可以看到PH5,PH6,PH7,PH8都被用作音频信号的引脚 ...
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...
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....
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...