openwrt MT7688 led/key配置

配置LED流程:
1、修改设备树,增加led节点
2、查看gpio复用,将led对应的端口配置成gpio模式
3、添加led触发模式

MT7688 共47个IO, 分两组控制,gpio0[0-31],gpio1[32-46]

1、添加led节点
led-wifi:gpio42 对应 gpio1_10
led-usb:gpio41 对应 gpio1_9
(此处led-usb只是定义led的名字,可用于usb状态,也可用于其他,例如lan口状态)

	leds {
     
		compatible = "gpio-leds";
		
		// led_wifi: wifi {
     
		// 	label = "linkit-smart-7688:orange:wifi";
		// 	gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
		// };

		// gpio42-gpio1_10
		led_wifi: wifi {
     
			label = "led-wifi";
			gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
			linux,default-trigger = "phy0tpt";
		};

		// gpio41-gpio1_9 
		led_usb: usb {
     
			label = "led-usb";
			gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
			linux,default-trigger = "usbport";
		};
	};

2、修改gpio复用
查看build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.180/arch/mips/ralink/mt7620.c

从prom_soc_init中,可确定7688 用的是mt7628an_pinmux_data。不同的型号,用的pinmap不同。

	if (is_mt76x8())
		rt2880_pinmux_data = mt7628an_pinmux_data;
	else
		rt2880_pinmux_data = mt7620a_pinmux_data;

mt7628an_pinmux_data定义如下:

static struct rt2880_pmx_group mt7628an_pinmux_data[] = {
     
	GRP_G("pwm1", pwm1_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_PWM1),
	GRP_G("pwm0", pwm0_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_PWM0),
	GRP_G("uart2", uart2_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_UART2),
	GRP_G("uart1", uart1_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_UART1),
	GRP_G("i2c", i2c_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_I2C),
	GRP("refclk", refclk_grp_mt7628, 1, MT7628_GPIO_MODE_REFCLK),
	GRP("perst", perst_grp_mt7628, 1, MT7628_GPIO_MODE_PERST),
	GRP("wdt", wdt_grp_mt7628, 1, MT7628_GPIO_MODE_WDT),
	GRP("spi", spi_grp_mt7628, 1, MT7628_GPIO_MODE_SPI),
	GRP_G("sdmode", sd_mode_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_SDMODE),
	GRP_G("uart0", uart0_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_UART0),
	GRP_G("i2s", i2s_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_I2S),
	GRP_G("spi cs1", spi_cs1_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_CS1),
	GRP_G("spis", spis_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_SPIS),
	GRP_G("gpio", gpio_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_GPIO),
	GRP_G("wled_an", wled_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_WLED_AN),
	GRP_G("p0led_an", p0led_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P0LED_AN),
	GRP_G("p1led_an", p1led_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P1LED_AN),
	GRP_G("p2led_an", p2led_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P2LED_AN),
	GRP_G("p3led_an", p3led_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P3LED_AN),
	GRP_G("p4led_an", p4led_an_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P4LED_AN),
	GRP_G("wled_kn", wled_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_WLED_KN),
	GRP_G("p0led_kn", p0led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P0LED_KN),
	GRP_G("p1led_kn", p1led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P1LED_KN),
	GRP_G("p2led_kn", p2led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P2LED_KN),
	GRP_G("p3led_kn", p3led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P3LED_KN),
	GRP_G("p4led_kn", p4led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK,
				1, MT7628_GPIO_MODE_P4LED_KN),
	{
      0 }
};

gpio41,gpio42 分别对应以上p1led_an、p2led_an
设备树中,将这两组gpio,设置为gpio模式

state_default: pinctrl0 {
     
		gpio {
     
			// eric++  p0led_an as gpio
			ralink,group = "gpio","p0led_an","p1led_an","p2led_an","p3led_an","p4led_an";
			ralink,function = "gpio";
		};

	};

3、menuconfig,打开对应led驱动模块

 .config - OpenWrt Configuration
 > Kernel modules > LED modules ───────────────────────────────────────────────────────────────
  ┌────────────────────────────────────── LED modules ──────────────────────────────────────┐
  │  Arrow keys navigate the menu.  <Enter> selects submenus ---> (or empty submenus ----). │  
  │  Highlighted letters are hotkeys.  Pressing <Y> includes, <N> excludes, <M> modularizes │  
  │  features.  Press <Esc><Esc> to exit, <?> for Help, </> for Search.  Legend: [*]        │  
  │  built-in  [ ] excluded  <M> module  < > module capable                                 │  
  │ ┌─────────────────────────────────────────────────────────────────────────────────────┐ │  
  │ │       <*> kmod-leds-gpio.......................................... GPIO LED support │ │  
  │ │       < > kmod-leds-pca963x.................................... PCA963x LED support │ │  
  │ │       <*> kmod-ledtrig-default-on........................... LED Default ON Trigger │ │  
  │ │       <*> kmod-ledtrig-gpio....................................... LED GPIO Trigger │ │  
  │ │       <*> kmod-ledtrig-heartbeat............................. LED Heartbeat Trigger │ │  
  │ │       <*> kmod-ledtrig-netdev................................... LED NETDEV Trigger │ │  
  │ │       <*> kmod-ledtrig-oneshot................................ LED One-Shot Trigger │ │  
  │ │       <*> kmod-ledtrig-timer..................................... LED Timer Trigger │ │  
  │ └───────v(+)──────────────────────────────────────────────────────────────────────────┘ │  
  ├─────────────────────────────────────────────────────────────────────────────────────────┤  
  │                <Select>    < Exit >    < Help >    < Save >    < Load >                 │  
  └─────────────────────────────────────────────────────────────────────────────────────────┘  
    

4、编译,查看设备节点

root@OpenWrt:/sys/devices/platform/leds/leds# ls
led-usb   led-wifi

5、测试led控制
1、关闭触发方式,echo none > trigger
2、打开led,echo 1 > brightness
3、关闭led,echo 0 > brightness

root@OpenWrt:/sys/devices/platform/leds/leds/led-usb# ls
brightness      interval        rx              tx
device          link            subsystem       uevent
device_name     max_brightness  trigger
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb# cat trigger
none switch0 timer default-on [netdev] gpio heartbeat oneshot usbport phy0rx phy0tx phy0assoc phy0radio phy0tpt
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb#
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb#
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb# echo none > trigger
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb# echo 1 > brightness
root@OpenWrt:/sys/devices/platform/leds/leds/led-usb# echo 0 > brightness

6、配置led自动触发
target/linux/ramips/base-files/etc/board.d/01_leds
配置led-wifi,wifi数据传输闪烁
配置led-usb,在lan口数据传输闪烁

linkits7688)
	# ucidef_set_led_wlan "wifi" "wifi" "linkit-smart-7688:orange:wifi" "phy0tpt"
	# eric++
	ucidef_set_led_wlan "wifi" "wifi" "led-wifi" "phy0tpt"
	ucidef_set_led_netdev "lan" "lan" "led-usb" "eth0"
	;;

7、按键配置

详情参考https://openwrt.org/docs/guide-user/hardware/hardware.button?s[]=rc&s[]=button

如发现系统启动过程中,出现以下log

kernel: [    3.590000] Error: Driver 'gpio-keys-polled' is already registered, aborting...

需要关掉冲突的配置,只保留kmod-input-gpio-keys-polled
CONFIG_PACKAGE_kmod-input-gpio-*
CONFIG_PACKAGE_kmod-button-hotplug

8、修改设备树,添加对应按键描述

	keys {
     
		compatible = "gpio-keys-polled";
		poll-interval = <20>;

		// gpio38----gpio1_6
		// wps {
     
		// 	label = "wps";
		// 	gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
		// 	linux,code = <KEY_WPS_BUTTON>;
		// };
		// reboot {
     
		// 	label = "reboot";
		// 	gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
		// 	linux,code = <KEY_POWER2>;
		// };
		reset {
     
			label = "reset";
			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_RESTART>;
		};
	};

9、进入系统中查看gpio状态

root@OpenWrt:/sys/kernel/debug# cat gpio
gpiochip0: GPIOs 0-31, parent: platform/10000600.gpio, 10000600.gpio:

gpiochip1: GPIOs 32-63, parent: platform/10000600.gpio, 10000600.gpio:
 gpio-38  (                    |reboot              ) in  hi
 gpio-41  (                    |led-usb             ) out lo
 gpio-42  (                    |led-wifi            ) out lo

gpiochip2: GPIOs 64-95, parent: platform/10000600.gpio, 10000600.gpio:

10、具体按键执行动作可查看文件

package/base-files/files/etc/rc.button/reboot
package/base-files/files/etc/rc.button/reset


仅此记录

你可能感兴趣的:(笔记收藏)