RK3328-CC 设备树与硬件不匹配
刚接触linux 不知道说的对不对，我想用ROC-RK3328-CC上40pin中的gpio引脚，看电路图应该给是连接到了GPIO0_A0,但是官方设备树里边这个引脚好像被usb3用了，不知道原因，还请各位达人指教。而且leds相关的设备树有两个灯属于RK805 电源芯片，红外输入引脚也没有使能。
vcc_host_5v: vcc-host-5v-regulator {
compatible = "regulator-fixed";
enable-active-high;
gpio = <&gpio0 0 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&usb30_host_drv>;
regulator-name = "vcc_host_5v";
regulator-always-on;
vin-supply = <&vcc_sys>;
};
leds {
compatible = "gpio-leds";
power {
label = "firefly:blue:power";
linux,default-trigger = "ir-power-click";
gpios = <&rk805 1 GPIO_ACTIVE_LOW>;
default-state = "on";
mode = <0x23>;
};
user {
label = "firefly:yellow:user";
linux,default-trigger = "ir-user-click";
gpios = <&rk805 0 GPIO_ACTIVE_LOW>;
default-state = "off";
mode = <0x05>;
};
ir {
status = "disabled";
/* gpios = <&gpio2 GPIO_C2 GPIO_ACTIVE_HIGH>; */
linux,default-trigger = "ir";
default-state = "off";
mode = <0x00>;
};
};
本帖最后由 hiking 于 2019-1-4 19:34 编辑
我使用板载的GPIO也没有驱动成功，后来按照教程：http://www.t-firefly.com/doc/product/info/255.html，
使用引脚SDIO改成普通GPIO成功驱动LED。
另外上面的例程中，我在匹配设备树关键属性compatible时一直失败，
后来参考/kernel/drivers/leds/leds-gpio.c,使用of_match_ptr解决;
static struct platform_driver firefly_gpio_driver = {
.driver = {
.name = "firefly-gpio",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(firefly_match_table),
},
.remove =gpio_remove,
.probe = firefly_gpio_probe,
};
hiking 发表于 2019-1-4 19:32
我使用板载的GPIO也没有驱动成功，后来按照教程：http://www.t-firefly.com/doc/product/info/255.html，
...
好的，谢谢 我试试
页:
[1]