Rock3/hardware/3c/gpio

Hardware V1.1

GPIO number	Function4	Function3	Function2	Function1	Pin#		Pin#	Function1	Function2	Function3	Function4	GPIO number
				+3.3V	1		2	+5.0V
32	CAN1_RX_M0	I2C3_SDA_M0	UART3_RX_M0	GPIO1_A0	3		4	+5.0V
33	CAN1_TX_M0	UART3_TX_M0	I2C3_SCL_M0	GPIO1_A1	5		6	GND
116			PWM12_M0	GPIO3_C4	7		8	GPIO0_D1	UART2_TX_M0			25
				GND	9		10	GPIO0_D0	UART2_RX_M0			24
97		UART7_TX_M1	PWM14_M0	GPIO3_A1	11		12	GPIO3_A3				99
98		UART7_RX_M1	PWM15_IR_M0	GPIO3_A2	13		14	GND
104			PWM1_M0	GPIO3_B0	15		16	GPIO3_B1	UART4_RX_M1	PWM8_M0		105
				+3.3V	17		18	GPIO3_B2	UART4_TX_M1	PWM9_M0		106
147	PWM15_IR_M1	SPI3_MOSI_M1	I2S3_SCLK_M1	GPIO4_C3	19		20	GND
149		I2S3_SDO1_M1	SPI3_MISO_M1	GPIO4_C5	21		22	GPIO3_C1				113
146		I2S3_MCLK_M1	SPI3_CLK_M1	GPIO4_C2	23		24	GPIO4_C6	SPI3_CS0_M1	PWM13_M1		150
				GND	25		26	GPIO4_D1				153
64		PWM2_M1	I2C2_SDA_M0	GPIO2_A0	27		28	GPIO4_B3				139
107			I2C1_SCL_M0	GPIO3_B3	29		30	GND
108			I2C5_SDA_M0	GPIO3_B4	31		32	GPIO3_C2				114
115			PWM15_IR_M0	GPIO3_C3	33		34	GND
100				GPIO3_A4	35		36	GPIO3_A7				103
36				GPIO1_A4	37		38	GPIO3_A6	I2S3_SDI_M0			102
				GND	39		40	GPIO3_A5	I2S3_SDO_M0			101

GPIO number

Rockchip RK3566 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below:

GPIO0_A0 ~ A7 
GPIO0_B0 ~ B7
GPIO0_C0 ~ C7
GPIO0_D0 ~ D7
   
GPIO1_A0 ~ A7
....
GPIO1_D0 ~ D7

For Rockchip 4.19 kernel, the GPIO number can be calculated as below, take GPIO4_A7 (PIN26 on 40-PIN HEADER) as an example:

GPIO4_A7 = 4*32 + 0*8 + 7 = 135
(A=0, B=1, C=2, D=3)

To set GPIO4_A7 output

cd /sys/class/gpio
echo 135 > export
cd gpio135
echo out > direction
echo 1 > value     # output high
echo 0 > value     # output low