* When gpiochip_add_data() is called very early during boot, so that GPIOs * can be freely used, the chip->parent device must be registered before * the gpio framework's arch_initcall(). Otherwise sysfs initialization * for GPIOs will fail rudely. * * gpiochip_add_data() must only...
mcp->client =client; i2c_set_clientdata(client, mcp); returngpiochip_add(&mcp->chip); } 要从控制器驱动程序中请求一个自有的GPIO,你不应该使用gpio_request()。GPIO驱动程序可以使用以下函数来请求和释放描述符,而不必永远被固定在内核上: structgpio_desc *gpiochip_request_own_desc(structgpio_desc ...
问gpio gpiochip0内核错误意味着什么以及如何解决？EN在过去几年中，随着云计算的兴起及其在全球范围内的...
spi0_clk ts0_data4 uart4exp_ctsn 每个 GPIO 口的驱动电流、上下拉和重置后的初始状态都不尽相同...
{int ret = 0;int data = 0;if(fd < 0) {ret = gpio_open(dev);if (ret < 0) {return -1;}}data = (gpio & 0x0f) << 4;ret = ioctl(fd, GPIO_IOC_GET_VALUE, &data);ALOGI("gpio_read: gpio=%d, data=%d, ret=%d", gpio, data, ret);// add error checking and debugging ...
Each of these chips provides access to a set of GPIOs. At present, when this chip is registered a global base number is assigned to this driver. The comments from the linux kernelgpio_chip_add_datasum up the situation nicely when assigning the a base number to a GPIO chip on ...
err = devm_gpiochip_add_data(dev, chip, txgpio); if (err) goto out;/* Push on irq_data and the domain for each line. */ for (i = 0; i < ngpio; i++) {err = irq_domain_push_irq(chip->irq.domain,txgpio->msix_entries[i].vector, chip); ...
> kerneldoc while we're at it. > > Modify all users to handle the change and use a struct > gpio_chip directly. And while we're at it: replace all > container_of() dereferencing by gpiochip_get_data() and > registering the gpio_chip with gpiochip_add_data(). ...
() dereferencing by gpiochip_get_data() and registering the gpio_chip with gpiochip_add_data(). Cc: a...@kernel.org Cc: Lee Jones <lee.jo...@linaro.org> Cc: Alexander Shiyan <shc_w...@mail.ru> Cc: Shawn Guo <shawn...@kernel.org> Cc: Sascha Hauer <ker...@pengutronix.de>...
i2c_set_clientdata(client, mcp); returngpiochip_add(&mcp->chip); } 要从控制器驱动程序中请求一个自有的GPIO,你不应该使用gpio_request()。GPIO驱动程序可以使用以下函数来请求和释放描述符,而不必永远被固定在内核上: structgpio_desc *gpiochip_request_own_desc(structgpio_desc *desc,constchar*label)...