beagleboneblack 使用gpiod_direction_output(gpio_rset,1)函数不起作用

内核版本为4.19

&spi1{
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins>;

wilc_spi: wilc_spi@0 {
status = "okay";
compatible = "microchip,wilc3000";
spi-max-frequency = <6000000>;
reg = <0>;
reset-gpios = <&gpio3 19 1>;
chip_en-gpios = <&gpio3 21 1>;
irq-gpios = <&gpio1 17 0>;
/*reset-gpios = <&reset_pins>;
chip_en-gpios = <&chipen_pins>;
irq-gpios = <&irq_pins>;*/
};
};
上面是设备树的配置

#define GPIO_NUM_CHIP_EN 117
#define GPIO_NUM_RESET 115
这是在源码中使用的GPIO

请问是用的哪个GPIO？终端操作指令部分也贴出来看一下。

使用的是GPIO3_21和GPIO3_19
终端指令echo 117 > export
echo out > direction
echo 1 > value

static int wilc_wlan_power(struct wilc *wilc, int power)
{
struct gpio_desc *gpio_reset;
struct gpio_desc *gpio_chip_en;
int ret = 0;

pr_info("wifi_pm : %d\n", power);

gpio_reset = gpiod_get(wilc->dt_dev, "reset", GPIOD_ASIS);
if (IS_ERR(gpio_reset)) {
dev_warn(wilc->dev, "failed to get Reset GPIO, try default\r\n");
gpio_reset = gpio_to_desc(GPIO_NUM_RESET);
if (!gpio_reset) {
dev_warn(wilc->dev,
"failed to get default Reset GPIO\r\n");
return -EIO;
}
} else {
dev_info(wilc->dev, "succesfully got gpio_reset\r\n");
}

gpio_chip_en = gpiod_get(wilc->dt_dev, "chip_en", GPIOD_ASIS);
if (IS_ERR(gpio_chip_en)) {
gpio_chip_en = gpio_to_desc(GPIO_NUM_CHIP_EN);
if (!gpio_chip_en) {
dev_warn(wilc->dev,
"failed to get default chip_en GPIO\r\n");
gpiod_put(gpio_reset);
return -EIO;
}
} else {
dev_info(wilc->dev, "succesfully got gpio_chip_en\r\n");
}

if (power) {
ret = gpiod_direction_output(gpio_chip_en, 1);
if (ret < 0) {
dev_warn(wilc->dev,
"failed to set chip_en GPIO direction\r\n");
goto out;
ret = -EIO;
}
mdelay(5);
ret = gpiod_direction_output(gpio_reset, 1);
if (ret) {
dev_warn(wilc->dev,
"failed to set reset GPIO direction\r\n");
goto out;
ret = -EIO;
}
if (gpiod_get_value(gpio_chip_en) == 1) {
dev_warn(wilc->dev,
"wilc en ok\r\n");
}
else
{
dev_warn(wilc->dev,
"wilc en not ok\r\n");
}
if (gpiod_get_value(gpio_reset) == 1) {
dev_warn(wilc->dev,
"wilc reset ok\r\n");
}
else
{
dev_warn(wilc->dev,
"wilc reset not ok\r\n");
}
} else {
ret = gpiod_direction_output(gpio_reset, 0);
if (ret) {
dev_warn(wilc->dev,
"failed to set chip_en GPIO direction\r\n");
goto out;
ret = -EIO;
}
ret = gpiod_direction_output(gpio_chip_en, 0);
if (ret) {
dev_warn(wilc->dev,
"failed to set reset GPIO direction\r\n");
goto out;
ret = -EIO;
}
}

out:
gpiod_put(gpio_chip_en);
gpiod_put(gpio_reset);

return ret;
}


这个就是源码，我用终端控制GPIO写1，然后用这个函数写0是可以的，但是写1不行

gpiod_put(gpio_chip_en);后GPIO就没有输出了

user6394011 说：

我用终端控制GPIO写1，然后用这个函数写0是可以的，但是写1不行

你的意思是终端不可以控制，但是通过写死程序可以控制吗？

是终端可以，使用程序gpiod_put(gpio_chip_en);后GPIO就没有输出了