int gpio_request_by_name(struct udevice *dev, const char *list_name, int index, struct gpio_desc *desc, int flags) 通过对应的udevice找到其dtsi节点中属性名为list_name的GPIO属性并转化为gpio_desc,并且request。 gpio_request_by_name_nodev int gpio_request_by_name_nodev(const void *blob, ...
host->ioaddr = (void *)base; gpio_request_by_name_nodev(offset_to_ofnode(node), "pwr-gpios", 0, &host->pwr_gpio, GPIOD_IS_OUT); gpio_request_by_name_nodev(offset_to_ofnode(node), "cd-gpios", 0, &host->cd_gpio, GPIOD_IS_IN); return 0; } # u-boot-2020.04\drivers\...
RET = GPIO_REQUEST_BY_NAME_NODEV (OFFSET_TO_ofnode)、"pintest-GPIO"、0、PIN_GPIO、GPIOD_is_OUT); IF (dm_gpio_is_valid (&pin_gpio)) { pin0Val = dm_gpio_get_value (&pin_gpio); printf ("Eric:GPIO_control_test dm_GPIO_get_value =%d [1]\r\n"、pin0Val)...
首先是DM框架中所定义的关于GPIO的UCLASS DRIVER,这个driver只有三个统一的接口,gpio_post_probe,gpio_post_bind和gpio_pre_remove。在以spi中的gpio操作为例,gpio_request->gpio_to_device拿着传入的gpio number遍历UCLASS_GPIO...
+ u32 value, i, debug, gpio, ret, cmds[CMD_LEN], length;memset(screen, 0, sizeof(*sc...
_by_compatible(gd-fdt_blob,0,"marvell,first");-if(node0)-{-printf("===Don't find marvell,first node\n");-return-1;-}+-gpio_request_by_name_nodev(offset_to_ofnode(node),"reset-gpio",0,gpio,-GPIOD_IS_OUT);/* 在驱动中调用gpio_request_by_name_nodev接口或者其他接口从dtsi节点...
在/board/nuvoton/nuc970evb/nuc970.c的函数board_late_init中添加 gpio_request(GPIO_PG3,NULL); gpio_direction_output(GPIO_PG3,1); 5.编译源码 make distclean make nuc970_config make all 讲mkimage工具复制到系统 cp tools/mkimage /bin
arm-linux-gnueabihf-ld.bfd:board/ti/am335x/built-in.o:in function `sdram_init':/home/applecai/studybr/u-boot-2020.10-rc4/board/ti/am335x/board.c:553:undefined reference to `gpio_request' arm-linux-gnueabihf-ld.bfd:/home/applecai/studybr/u-boot-2020.10-rc4/board/ti/am335x/board.c...
request size: 16384 KB [ 1.520668] sun8i-v3s-pinctrl 1c20800.pinctrl: pin PG1 already requested by 1c10000.mmc; cannot claim for 1c20800.pinctrl:193 [ 1.532060] sun8i-v3s-pinctrl 1c20800.pinctrl: pin-193 (1c20800.pinctrl:193) status -22 [ 1.540115] leds-gpio: probe of leds ...
go-start application at address'addr'gpio-query and control gpio pins help-print command description/usage i2c-I2Csub-system icache-enable or disable instruction cache iminfo-print header informationforapplication image imxtract-extract a partofa multi-image ...