RV1126 GPIO及PWM 控制

RV1126 GPIO 控制：
1. 修改 dtsi 文件，BSP/kernel/arch/arm/boot/dts/rongpin/rv1126_1109_common.dtsi
rp_gpio {
            status = "okay";
            compatible = "rp_gpio";
            vcc_led{
                       gpio_num = <&gpio4 RK_PA1 GPIO_ACTIVE_LOW>;
                       gpio_function = <0>;
            };

            wifi_led{
                       gpio_num = <&gpio2 RK_PD2 GPIO_ACTIVE_LOW>;
                       gpio_function = <0>;
            };
}
----------------------------------------------------
LED_Y_PWM: GPIO0_C0      #16
LED_X_PWM: GPIO0_C3      #19
LED_W_PWM: GPIO0_C2     #18
LED_V_PWM: GPIO2_B3      控制一个灯  #75
LED_L_PWM: GPIO2_B2      控制四个灯  #74
VCC_LED: GPIO4_A1           打开24V电源（12V无法工作）

FANCTL1: GPIO2_D1
FANCTL2: GPIO2_D3

WIFI_LED: GPIO_D2

如何在 /sys/class/gpio 中控制 GPIO：

GPIO编号计算
GPIO编号 = BANK * 32 + GPIO_PIN
GPION_MP = N * 32 + 8 * (M -1) + P
示例：GPIO7_C2 = 7 X 32 + 8 X (3-1) + 2 = 242
GPIO2_A1 = 2 X 32 + 8 X (1-1) + 1 = 73
A对应1，B对应2，C对应3，以此类推
-------------------------------------------------------------
示例：设置GPIO2_D1为高电平
导出GPIO2_D1引脚
echo 89 > /sys/class/gpio/export
导出成功后，会生成/sys/class/gpio/gpio89目录
若没有生成，说明该引脚不可导出
设置GPIO2_D1引脚为输出模式
echo out > /sys/class/gpio/gpio89/direction
设置GPIO2_D1引脚高电平
echo 1 > /sys/class/gpio/gpio89/value
-----------------------------------------------------------
# GPIO0_C0 / LED_Y_PWM 白光控制
echo 16 > /sys/class/gpio/export 
echo out > /sys/class/gpio/gpio16/direction 
echo 1 > /sys/class/gpio/gpio16/value 
echo 0 > /sys/class/gpio/gpio16/value 

# GPIO_C2 / LED_W_PWM 白光控制
echo 18 > /sys/class/gpio/export 
echo out > /sys/class/gpio/gpio18/direction 
echo 1 > /sys/class/gpio/gpio18/value 
echo 0 > /sys/class/gpio/gpio18/value 

# GPIO_C3 / LED_X_PWM 白光控制
echo 19 > /sys/class/gpio/export 
echo out > /sys/class/gpio/gpio19/direction 
echo 1 > /sys/class/gpio/gpio19/value 
echo 0 > /sys/class/gpio/gpio19/value 

# GPIO2_B3 / LED_V_PWM 单颗紫外线
echo 75 > /sys/class/gpio/export 
echo out > /sys/class/gpio/gpio75/direction 
echo 1 > /sys/class/gpio/gpio75/value 
echo 0 > /sys/class/gpio/gpio75/value 

# GPIO2_B2 / LED_L_PWM 四颗紫外线
echo 74 > /sys/class/gpio/export 
echo out > /sys/class/gpio/gpio74/direction 
echo 1 > /sys/class/gpio/gpio74/value 
echo 0 > /sys/class/gpio/gpio74/value 

==============================
PWM 控制：
PWM 脚位的配置：
BSP/kernel/arch/arm/boot/dts/rv1126-pinctrl.dtsi
BSP/kernel/arch/arm/boot/dts/rongpin/rv1126_1109_common.dtsi

# 打 VCC LED (24V) 电源
echo 1 >  /proc/rp_gpio/vcc_led

echo 0 >  /proc/rp_gpio/vcc_led

PWM8 - GPIO2_B3 - PWM0M1   / pwmchip5 - ok
PWM1 - GPIO2_B2 - PWM1M1   / pwmchip1 - ok
PWM5 - GPIO0_C3 - PWM5M0   / pwmchip4 - ok
PWM4 - GPIO0_C2 - PWM4M0   / pwmchip3 - ok
PWM2 - GPIO0_C0 - PWM2M0   / pwmchip2 - ok

# PWM1 - GPIO2_B2 - PWM1M1   / pwmchip1 - ok
--------------------------------------------
echo 0 > /sys/class/pwm/pwmchip1/export
echo 1000000 > /sys/class/pwm/pwmchip1/pwm0/period
echo 100000 > /sys/class/pwm/pwmchip1/pwm0/duty_cycle
echo normal > /sys/class/pwm/pwmchip1/pwm0/polarity
echo 1 > /sys/class/pwm/pwmchip1/pwm0/enable


# PWM2 - GPIO0_C0 - PWM2M0   / pwmchip2 - ok
# --------------------------------------------
echo 0 > /sys/class/pwm/pwmchip2/export
echo 1000000 > /sys/class/pwm/pwmchip2/pwm0/period
echo 100000 > /sys/class/pwm/pwmchip2/pwm0/duty_cycle
echo normal > /sys/class/pwm/pwmchip2/pwm0/polarity
echo 1 > /sys/class/pwm/pwmchip2/pwm0/enable


# PWM4 - GPIO0_C2 - PWM4M0   / pwmchip3 - ok
# --------------------------------------------
echo 0 > /sys/class/pwm/pwmchip3/export
echo 1000000 > /sys/class/pwm/pwmchip3/pwm0/period
echo 100000 > /sys/class/pwm/pwmchip3/pwm0/duty_cycle
echo normal > /sys/class/pwm/pwmchip3/pwm0/polarity
echo 1 > /sys/class/pwm/pwmchip3/pwm0/enable


# PWM5 - GPIO0_C3 - PWM5M0   / pwmchip4 - ok
# --------------------------------------------
echo 0 > /sys/class/pwm/pwmchip4/export
echo 1000000 > /sys/class/pwm/pwmchip4/pwm0/period
echo 100000 > /sys/class/pwm/pwmchip4/pwm0/duty_cycle
echo normal > /sys/class/pwm/pwmchip4/pwm0/polarity
echo 1 > /sys/class/pwm/pwmchip4/pwm0/enable


# PWM8 - GPIO2_B3 - PWM8M1   / pwmchip5 - ok
# --------------------------------------------
echo 0 > /sys/class/pwm/pwmchip5/export
echo 1000000 > /sys/class/pwm/pwmchip5/pwm0/period
echo 100000 > /sys/class/pwm/pwmchip5/pwm0/duty_cycle
echo normal > /sys/class/pwm/pwmchip5/pwm0/polarity
echo 1 > /sys/class/pwm/pwmchip5/pwm0/enable