然后找到fbtft_request_one_gpio和fbtft_request_gpios函数,这两个函数原本因为使用的gpio申请方式不同,导致无法申请,这里需要对这两个函数进行修改: static intfbtft_request_one_gpio(struct fbtft_par*par,const char*name,int index,struct gpio_desc**gpiop){struct device*dev=par->info->device;struct devi...
可以看到通过fbtft_request_one_gpio了名为cs的引脚,来看看fbtft_request_one_gpio函数 staticintfbtft_request_one_gpio(structfbtft_par*par,constchar*name,intindex,structgpio_desc**gpiop){structdevice*dev=par->info->device;*gpiop=devm_gpiod_get_index_optional(dev,name,index,GPIOD_OUT_LOW);if(I...
Below there is an image from the datasheet: EDITED: I read from other issues that it dmesg | grep fbtft_request_gpios should give me if the pins was initialized but it doens't return nothing. I created that schematic a long time ago, and it was based of Spritemods schematic and vald...
The overlays was never meant to be used together. That will give 2 devices and one of them will fail to load. I added the ads7846 overlay to be used together with fbtft_device. Something like this would give swapxy overlay property in the piscreen overlay: -piscreen-ts@1 {+piscreen_t...
/** * struct fbtft_gpio - Structure that holds one pinname to gpio mapping * @name: pinname (reset, dc, etc.)* @gpio: GPIO number * */ struct fbtft_gpio { char name[FBTFT_GPIO_NAME_SIZE]; unsigned gpio; }; struct fbtft_par; ...
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