gpiochip_is_requested函数是Linux内核中用于检查特定GPIO引脚是否已被请求的函数。这个函数的定义通常在Linux内核源码的GPIO子系统中可以找到。例如,在Linux内核源码树的drivers/gpio/gpiolib.c文件中,你可能会找到类似的函数定义。 2. 理解gpiochip_is_requested函数的参数 gpiochip_is_requested函数通常接受一个指向gpi...
> for being contained inside a struct so that struct gpio_chip > is contained in a struct contained in a struct, making several > steps of dereferencing necessary. > > Make things simpler: include the fields directly into > <linux/gpio/driver.h>, #ifdef:ed for CONFIG_GENERIC_GPIO, and ...
The separate struct bgpio_chip has been a pain to handle, both by being confusingly similar in name to struct gpio_chip and for being contained inside a struct so that struct gpio_chip is contained in a struct contained in a struct, making several steps of dereferencing necessary. Make thi...
struct nand_chip *this = mtd.priv; struct nand_chip *this = mtd->priv; void (*hwctrl)(struct mtd_info *mtd, int cmd, unsigned int ctrl) = this->cmd_ctrl; int page_addr; if (nand_chip.select_chip) nand_chip.select_chip(&mtd, 0); nand_chip.select_chip(mtd, 0); page_a...
Linux下GPIO驱动(三) ---gpio_desc()的分析 2013-08-24 15:46 −上篇最后提出的疑问是结构体gpio_chip中的成员函数set等是怎么实现的,在回答之前先介绍下gpio_desc这个结构体。 如上图所示,右上方部分为GPIO驱动对其它驱动提供的... 熊猫酒仙是也 0...
S2 =SCLK // In ESP8266 overlap mode the following must be defined //#define TFT_SPI_OVERLAP // In ESP8266 overlap mode the TFT chip select MUST connect to pin D3 //#define TFT_CS PIN_D3 //#define TFT_DC PIN_D5 // Data Command control pin //#define TFT_RST PIN_D4 // Rese...
gpio greybus hsi i3c iio input irqchip isdn lockd mailbox mdio mfd mlx4 mlx5 mmc mtd mux net netfilter netfilter_arp netfilter_bridge netfilter_ipv4 netfilter_ipv6 pcs perf phy pinctrl platform_data power qed raid 8250_pci.h a.out.h acct.h acpi.h acpi_dma.h acpi...
The examples are based on aSTM32F407chip using theGNU Arm Embedded Toolchain. The STM32F4 uses a port-based GPIO (General Purpose Input Output) model, where each port can manage 16 physical pins. The LEDS are mapped to external pins 55-58 which maps internally onto GPIO Port D pins 8...
struct nand_chip now embeds an mtd device. Make use of this mtd instance. Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com> --- drivers/mtd/nand/pxa3xx_nand.c | 33 ++++++++++--- 1 file changed, 17 insertions(...
[PATCH v4 05/58] mtd: nand: ams-delta: use the mtd instance embedded in struct nand_chip struct nand_chip now embeds an mtd device. Make use of this mtd instance instead of allocating our own.