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--- library:rk3568:lcddrv [2022/11/02 23:49]
lhaosen [2.1 spidev配置]
+++ library:rk3568:lcddrv [2022/11/02 23:55] (current)
lhaosen [2. Linux驱动设计（A）]
@@ Line 47: / Line 47: @@
   * spi: /CS,SCK,SDA使用spidev驱动
+==== - 控制IO ====
+=== - dts ===
+<code>
+		lcd_reset: reset {
+			label = "lcd:reset";
+			linux,default-trigger = "none";
+			default-state = "on";
+			gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
+		};
+		lcd_backlight: backlight {
+			label = "lcd:backlight";
+			linux,default-trigger = "none";
+			default-state = "on";
+			gpios = <&gpio0 RK_PC3 GPIO_ACTIVE_HIGH>;
+		};
+		lcd_data: data {
+			label = "lcd:data";
+			linux,default-trigger = "none";
+			default-state = "on";
+			gpios = <&gpio0 RK_PC1 GPIO_ACTIVE_HIGH>;
+		};
+</code>
+添加以上3个pin的gpio-leds节点，驱动成功后的访问入口为：
+  /sys/class/leds/lcd:reset
+  /sys/class/leds/lcd:backlight
+  /sys/class/leds/lcd:data
+可以用命令测试这几个pin的状态：
+  # backlight = 1
+  echo 1 > /sys/class/leds/lcd:backlight
+  # backlight = 0
+  echo 1 > /sys/class/leds/lcd:backlight
 ==== - spidev配置 ====
 修改DTS及添加驱动到内核

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