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PROCESSOR-SDK-AM62A: Cant control some gpio in SDK10.0.0 with gpioset command

Part Number: PROCESSOR-SDK-AM62A

Tool/software:

root@am62axx-evm:/dev# uname -a
Linux am62axx-evm 6.6.32-gdb8871293143-dirty #2 SMP PREEMPT Fri Nov 15 04:36:08 EST 2024 aarch64 aarch64 aarch64 GNU/Linux
root@am62axx-evm:/dev# gpiodetect
gpiochip0 [4201000.gpio] (24 lines)
gpiochip1 [600000.gpio] (92 lines)
gpiochip2 [601000.gpio] (52 lines)
gpiochip3 [0-0048] (11 lines)

I am using an AM62 chip with SDK version 10.0.0.


I tried to use the gpio tool in the application layer to control GPIO0_89 to be high and then pull it low for the purpose of manually resetting the chip. When I try to configure the output of this pin using gpioset and gpioget etc. it does not configure properly and it does remain low when I measure it with a multimeter .

root@am62axx-evm:/dev# gpioset /dev/gpiochip1 89=1
root@am62axx-evm:/dev# gpioget /dev/gpiochip1 89
0

At the same time, when I configure another pin GPIO1_23, I can use this instruction to control it normally, and I can test it with a multimeter.

root@am62axx-evm:/dev# gpioget /dev/gpiochip2 23
1
root@am62axx-evm:/dev# gpioset /dev/gpiochip2 23=0
root@am62axx-evm:/dev# gpioget /dev/gpiochip2 23
0

dmesg prints the following

[ 1321.003665] gpio gpiochip1: Persistence not supported for GPIO 89
[ 1321.003690] gpio gpiochip1: registered chardev handle for line 89
[ 1321.003713] gpio gpiochip1: registered chardev handle for 1 lines
[ 1772.929431] gpio gpiochip1: Persistence not supported for GPIO 89
[ 1772.929456] gpio gpiochip1: registered chardev handle for line 89
[ 1772.929476] gpio gpiochip1: registered chardev handle for 1 lines
[ 1779.010352] gpio gpiochip1: Persistence not supported for GPIO 89
[ 1779.010376] gpio gpiochip1: registered chardev handle for line 89
[ 1779.010397] gpio gpiochip1: registered chardev handle for 1 lines
[ 1927.101133] gpio gpiochip2: Persistence not supported for GPIO 23
[ 1927.101157] gpio gpiochip2: registered chardev handle for line 23
[ 1927.101177] gpio gpiochip2: registered chardev handle for 1 lines
[ 1932.502128] gpio gpiochip2: Persistence not supported for GPIO 23
[ 1932.502153] gpio gpiochip2: registered chardev handle for line 23
[ 1932.502172] gpio gpiochip2: registered chardev handle for 1 lines
[ 1933.760519] gpio gpiochip2: Persistence not supported for GPIO 23
[ 1933.760544] gpio gpiochip2: registered chardev handle for line 23
[ 1933.760563] gpio gpiochip2: registered chardev handle for 1 lines

  • Hello,

    Just so you're aware, calling gpioset then gpioget will change the direction of the GPIO and it will lose context of the previous value. Like if gpioset X=0, then gpioget X might return 1 or 0 depending on the default value.

    Are you using a TI EVM or custom hardware?

    Can you share the GPIO nodes of the device tree?

    The 'Persistence not supported' log points to this gpiolib.c driver: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/drivers/gpio/gpiolib.c?h=ti-linux-6.6.y#n2381

    The 'registered chardev handle' log points to gpiolib-cdev.c driver: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/drivers/gpio/gpiolib-cdev.c?h=ti-linux-6.6.y

    Best Regards,

    Anshu

  • Hello,

    Here is the device tree

    // SPDX-License-Identifier: GPL-2.0
    /*
     * AM62A SK: https://www.ti.com/lit/zip/sprr459
     *
     * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
     */
    
    /dts-v1/;
    
    #include <dt-bindings/leds/common.h>
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/net/ti-dp83867.h>
    #include "k3-am62a7.dtsi"
    
    / {
    	compatible = "ti,am62a7-sk", "ti,am62a7";
    	model = "Texas Instruments AM62A7 SK";
    
    	aliases {
    		serial0 = &wkup_uart0;
    		serial2 = &main_uart0;
    		serial3 = &main_uart1;
    		mmc0 = &sdhci0;
    		mmc1 = &sdhci1;
    		ethernet0 = &cpsw_port1;
    		spi0 = &ospi0;
    		rtc0 = &wkup_rtc0;
    		rtc1 = &tps659312;
    	};
    
    	chosen {
    		stdout-path = "serial2:115200n8";
    	};
    
    	memory@80000000 {
    		device_type = "memory";
    		/* 4G RAM */
    		reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
    		      <0x00000008 0x80000000 0x00000000 0x80000000>;
    	};
    
    	reserved-memory {
    		#address-cells = <2>;
    		#size-cells = <2>;
    		ranges;
    
    		/* global cma region */
    		linux,cma {
    			compatible = "shared-dma-pool";
    			reusable;
    			size = <0x00 0x24000000>;
    			alloc-ranges = <0x00 0xc0000000 0x00 0x24000000>;
    			linux,cma-default;
    		};
    
    		secure_tfa_ddr: tfa@9e780000 {
    			reg = <0x00 0x9e780000 0x00 0x80000>;
    			alignment = <0x1000>;
    			no-map;
    		};
    
    		secure_ddr: optee@9e800000 {
    			reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
    			alignment = <0x1000>;
    			no-map;
    		};
    
    		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9c800000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x9c800000 0x00 0x100000>;
    			no-map;
    		};
    
    		wkup_r5fss0_core0_memory_region: r5f-dma-memory@9c900000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x9c900000 0x00 0x01e00000>;
    			no-map;
    		};
    		mcu_r5fss0_core0_dma_memory_region: r5f-dma-memory@9b800000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x9b800000 0x00 0x100000>;
    			no-map;
    		};
    
    		mcu_r5fss0_core0_memory_region: r5f-dma-memory@9b900000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x9b900000 0x00 0x0f00000>;
    			no-map;
    		};
    
    		c7x_0_dma_memory_region: c7x-dma-memory@99800000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x99800000 0x00 0x100000>;
    			no-map;
    		};
    
    		c7x_0_memory_region: c7x-memory@99900000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0x99900000 0x00 0x01f00000>;
    			no-map;
    		};
    
    		edgeai_rtos_ipc_memory_region: edgeai-rtos-ipc-memory-region {
    			reg = <0x00 0xa0000000 0x00 0x01000000>;
    			no-map;
    		};
    
    		edgeai_memory_region: edgeai-dma-memory@a1000000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0xa1000000 0x00 0x02000000>;
    			no-map;
    		};
    
    		edgeai_shared_region: edgeai_shared-memories {
    			compatible = "dma-heap-carveout";
    			reg = <0x00 0xa3000000 0x00 0x0b000000>;
    		};
    
    		edgeai_core_heaps: edgeai-core-heap-memory@ae000000 {
    			compatible = "shared-dma-pool";
    			reg = <0x00 0xae000000 0x00 0x12000000>;
    			no-map;
    		};
    	};
    
    	opp-table {
    		/* Add 1.4GHz OPP for am62p5-sk board. Requires VDD_CORE at 0v85 */
    		opp-1400000000 {
    			opp-hz = /bits/ 64 <1400000000>;
    			opp-supported-hw = <0x01 0x0004>;
    			clock-latency-ns = <6000000>;
    		};
    	};
    
    	vmain_pd: regulator-0 {
    		/* TPS25750 PD CONTROLLER OUTPUT */
    		compatible = "regulator-fixed";
    		regulator-name = "vmain_pd";
    		regulator-min-microvolt = <5000000>;
    		regulator-max-microvolt = <5000000>;
    		regulator-always-on;
    		regulator-boot-on;
    	};
    
    	vcc_5v0: regulator-1 {
    		/* Output of TPS63070 */
    		compatible = "regulator-fixed";
    		regulator-name = "vcc_5v0";
    		regulator-min-microvolt = <5000000>;
    		regulator-max-microvolt = <5000000>;
    		vin-supply = <&vmain_pd>;
    		regulator-always-on;
    		regulator-boot-on;
    	};
    
    	vcc_3v3_main: regulator-2 {
    		/* output of LM5141-Q1 */
    		compatible = "regulator-fixed";
    		regulator-name = "vcc_3v3_main";
    		regulator-min-microvolt = <3300000>;
    		regulator-max-microvolt = <3300000>;
    		vin-supply = <&vmain_pd>;
    		regulator-always-on;
    		regulator-boot-on;
    	};
    
    	vcc_3v3_sys: regulator-4 {
    		/* output of TPS222965DSGT */
    		compatible = "regulator-fixed";
    		regulator-name = "vcc_3v3_sys";
    		regulator-min-microvolt = <3300000>;
    		regulator-max-microvolt = <3300000>;
    		vin-supply = <&vcc_3v3_main>;
    		regulator-always-on;
    		regulator-boot-on;
    	};
    
    	vddshv_sdio: regulator-5 {
    		compatible = "regulator-gpio";
    		regulator-name = "vddshv_sdio";
    		pinctrl-names = "default";
    		pinctrl-0 = <&vddshv_sdio_pins_default>;
    		regulator-min-microvolt = <1800000>;
    		regulator-max-microvolt = <3300000>;
    		regulator-boot-on;
    		vin-supply = <&ldo1>;
    		gpios = <&main_gpio0 31 GPIO_ACTIVE_HIGH>;
    		states = <1800000 0x0>,
    			 <3300000 0x1>;
    	};
    
    	leds {
    		compatible = "gpio-leds";
    		pinctrl-names = "default";
    		pinctrl-0 = <&usr_led_pins_default>;
    
    		led-0 {
    			label = "am62a-sk:green:heartbeat";
    			gpios = <&main_gpio1 49 GPIO_ACTIVE_HIGH>;
    			linux,default-trigger = "heartbeat";
    			function = LED_FUNCTION_HEARTBEAT;
    			default-state = "off";
    		};
    	};
    
    	tlv320_mclk: clk-0 {
    		#clock-cells = <0>;
    		compatible = "fixed-clock";
    		clock-frequency = <12288000>;
    	};
    
    	hdmi0: connector-hdmi {
    		compatible = "hdmi-connector";
    		label = "hdmi";
    		type = "a";
    
    		port {
    			hdmi_connector_in: endpoint {
    				remote-endpoint = <&sii9022_out>;
    			};
    		};
    	};
    
    	codec_audio: sound {
    		compatible = "simple-audio-card";
    		simple-audio-card,name = "AM62Ax-SKEVM";
    		simple-audio-card,widgets =
    			"Headphone",	"Headphone Jack",
    			"Line",		"Line In",
    			"Microphone",	"Microphone Jack";
    		simple-audio-card,routing =
    			"Headphone Jack",	"HPLOUT",
    			"Headphone Jack",	"HPROUT",
    			"LINE1L",		"Line In",
    			"LINE1R",		"Line In",
    			"MIC3R",		"Microphone Jack",
    			"Microphone Jack",	"Mic Bias";
    		simple-audio-card,format = "dsp_b";
    		simple-audio-card,bitclock-master = <&sound_master>;
    		simple-audio-card,frame-master = <&sound_master>;
    		simple-audio-card,bitclock-inversion;
    
    		simple-audio-card,cpu {
    			sound-dai = <&mcasp1>;
    		};
    
    		sound_master: simple-audio-card,codec {
    			sound-dai = <&tlv320aic3106>;
    			clocks = <&tlv320_mclk>;
    		};
    	};
    };
    
    &mcu_pmx0 {
    	wkup_uart0_pins_default: wkup-uart0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_MCU_IOPAD(0x0024, PIN_INPUT, 0) /* (C9) WKUP_UART0_RXD */
    			AM62AX_MCU_IOPAD(0x0028, PIN_OUTPUT, 0) /* (E9) WKUP_UART0_TXD */
    			AM62AX_MCU_IOPAD(0x002c, PIN_INPUT, 0) /* (C10) WKUP_UART0_CTSn */
    			AM62AX_MCU_IOPAD(0x0030, PIN_OUTPUT, 0) /* (C8) WKUP_UART0_RTSn */
    		>;
    	};
    };
    
    /* WKUP UART0 is used for DM firmware logs */
    &wkup_uart0 {
    	pinctrl-names = "default";
    	pinctrl-0 = <&wkup_uart0_pins_default>;
    	status = "reserved";
    };
    
    &main_pmx0 {
    	main_dss0_pins_default: main-dss0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x100, PIN_OUTPUT, 0) /* (V17) VOUT0_VSYNC */
    			AM62AX_IOPAD(0x0f8, PIN_OUTPUT, 0) /* (T18) VOUT0_HSYNC */
    			AM62AX_IOPAD(0x104, PIN_OUTPUT, 0) /* (AA22) VOUT0_PCLK */
    			AM62AX_IOPAD(0x0fc, PIN_OUTPUT, 0) /* (U17) VOUT0_DE */
    			AM62AX_IOPAD(0x0b8, PIN_OUTPUT, 0) /* (U22) VOUT0_DATA0 */
    			AM62AX_IOPAD(0x0bc, PIN_OUTPUT, 0) /* (U21) VOUT0_DATA1 */
    			AM62AX_IOPAD(0x0c0, PIN_OUTPUT, 0) /* (U20) VOUT0_DATA2 */
    			AM62AX_IOPAD(0x0c4, PIN_OUTPUT, 0) /* (U19) VOUT0_DATA3 */
    			AM62AX_IOPAD(0x0c8, PIN_OUTPUT, 0) /* (T19) VOUT0_DATA4 */
    			AM62AX_IOPAD(0x0cc, PIN_OUTPUT, 0) /* (U18) VOUT0_DATA5 */
    			AM62AX_IOPAD(0x0d0, PIN_OUTPUT, 0) /* (V22) VOUT0_DATA6 */
    			AM62AX_IOPAD(0x0d4, PIN_OUTPUT, 0) /* (V21) VOUT0_DATA7 */
    			AM62AX_IOPAD(0x0d8, PIN_OUTPUT, 0) /* (V19) VOUT0_DATA8 */
    			AM62AX_IOPAD(0x0dc, PIN_OUTPUT, 0) /* (V18) VOUT0_DATA9 */
    			AM62AX_IOPAD(0x0e0, PIN_OUTPUT, 0) /* (W22) VOUT0_DATA10 */
    			AM62AX_IOPAD(0x0e4, PIN_OUTPUT, 0) /* (W21) VOUT0_DATA11 */
    			AM62AX_IOPAD(0x0e8, PIN_OUTPUT, 0) /* (W20) VOUT0_DATA12 */
    			AM62AX_IOPAD(0x0ec, PIN_OUTPUT, 0) /* (W19) VOUT0_DATA13 */
    			AM62AX_IOPAD(0x0f0, PIN_OUTPUT, 0) /* (Y21) VOUT0_DATA14 */
    			AM62AX_IOPAD(0x0f4, PIN_OUTPUT, 0) /* (Y22) VOUT0_DATA15 */
    			AM62AX_IOPAD(0x05c, PIN_OUTPUT, 1) /* (P22) GPMC0_AD8.VOUT0_DATA16 */
    			AM62AX_IOPAD(0x060, PIN_OUTPUT, 1) /* (R19) GPMC0_AD9.VOUT0_DATA17 */
    			AM62AX_IOPAD(0x064, PIN_OUTPUT, 1) /* (R20) GPMC0_AD10.VOUT0_DATA18 */
    			AM62AX_IOPAD(0x068, PIN_OUTPUT, 1) /* (R22) GPMC0_AD11.VOUT0_DATA19 */
    			AM62AX_IOPAD(0x06c, PIN_OUTPUT, 1) /* (T22) GPMC0_AD12.VOUT0_DATA20 */
    			AM62AX_IOPAD(0x070, PIN_OUTPUT, 1) /* (R21) GPMC0_AD13.VOUT0_DATA21 */
    			AM62AX_IOPAD(0x074, PIN_OUTPUT, 1) /* (T20) GPMC0_AD14.VOUT0_DATA22 */
    			AM62AX_IOPAD(0x078, PIN_OUTPUT, 1) /* (T21) GPMC0_AD15.VOUT0_DATA23 */
    		>;
    	};
    
    	main_uart0_pins_default: main-uart0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x1c8, PIN_INPUT, 0) /* (E14) UART0_RXD */
    			AM62AX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (D15) UART0_TXD */
    		>;
    	};
    
    	main_uart1_pins_default: main-uart1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x01e8, PIN_INPUT, 1) /* (C17) I2C1_SCL.UART1_RXD */
    			AM62AX_IOPAD(0x01ec, PIN_OUTPUT, 1) /* (E17) I2C1_SDA.UART1_TXD */
    			AM62AX_IOPAD(0x0194, PIN_INPUT, 2) /* (C19) MCASP0_AXR3.UART1_CTSn */
    			AM62AX_IOPAD(0x0198, PIN_OUTPUT, 2) /* (B19) MCASP0_AXR2.UART1_RTSn */
    		>;
    	};
    
    	main_i2c0_pins_default: main-i2c0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x1e0, PIN_INPUT_PULLUP, 0) /* (B16) I2C0_SCL */
    			AM62AX_IOPAD(0x1e4, PIN_INPUT_PULLUP, 0) /* (A16) I2C0_SDA */
    		>;
    	};
    
    	main_i2c1_pins_default: main-i2c1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x1e8, PIN_INPUT_PULLUP, 0) /* (B17) I2C1_SCL */
    			AM62AX_IOPAD(0x1ec, PIN_INPUT_PULLUP, 0) /* (A17) I2C1_SDA */
    		>;
    	};
    
    	main_i2c2_pins_default: main-i2c2-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x0b0, PIN_INPUT_PULLUP, 1) /* (K22) GPMC0_CSn2.I2C2_SCL */
    			AM62AX_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPMC0_CSn3.I2C2_SDA */
    		>;
    	};
    
    	main_mmc0_pins_default: main-mmc0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
    			AM62AX_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLKLB */
    			AM62AX_IOPAD(0x21c, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
    			AM62AX_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
    			AM62AX_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (AA1) MMC0_DAT1 */
    			AM62AX_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (AA3) MMC0_DAT2 */
    			AM62AX_IOPAD(0x208, PIN_INPUT_PULLUP, 0) /* (Y4) MMC0_DAT3 */
    			AM62AX_IOPAD(0x204, PIN_INPUT_PULLUP, 0) /* (AB2) MMC0_DAT4 */
    			AM62AX_IOPAD(0x200, PIN_INPUT_PULLUP, 0) /* (AC1) MMC0_DAT5 */
    			AM62AX_IOPAD(0x1fc, PIN_INPUT_PULLUP, 0) /* (AD2) MMC0_DAT6 */
    			AM62AX_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (AC2) MMC0_DAT7 */
    		>;
    	};
    
    	main_mmc1_pins_default: main-mmc1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x23c, PIN_INPUT, 0) /* (A21) MMC1_CMD */
    			AM62AX_IOPAD(0x234, PIN_INPUT, 0) /* (B22) MMC1_CLK */
    			AM62AX_IOPAD(0x230, PIN_INPUT, 0) /* (A22) MMC1_DAT0 */
    			AM62AX_IOPAD(0x22c, PIN_INPUT, 0) /* (B21) MMC1_DAT1 */
    			AM62AX_IOPAD(0x228, PIN_INPUT, 0) /* (C21) MMC1_DAT2 */
    			AM62AX_IOPAD(0x224, PIN_INPUT, 0) /* (D22) MMC1_DAT3 */
    			AM62AX_IOPAD(0x240, PIN_INPUT, 0) /* (D17) MMC1_SDCD */
    		>;
    	};
    
    	usr_led_pins_default: usr-led-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x244, PIN_OUTPUT, 7) /* (D18) MMC1_SDWP.GPIO1_49 */
    		>;
    	};
    
    	main_usb0_pins_default: main-usb0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x0254, PIN_OUTPUT, 0) /* (C20) USB0_DRVVBUS */
    		>;
    	};
    
    
    	main_usb1_pins_default: main-usb1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x0258, PIN_OUTPUT, 0) /* (F18) USB1_DRVVBUS */
    		>;
    	};
    
    	main_mdio1_pins_default: main-mdio1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x160, PIN_OUTPUT, 0) /* (V12) MDIO0_MDC */
    			AM62AX_IOPAD(0x15c, PIN_INPUT, 0) /* (V13) MDIO0_MDIO */
    		>;
    	};
    
    	main_rgmii1_pins_default: main-rgmii1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x14c, PIN_INPUT, 0) /* (AB16) RGMII1_RD0 */
    			AM62AX_IOPAD(0x150, PIN_INPUT, 0) /* (V15) RGMII1_RD1 */
    			AM62AX_IOPAD(0x154, PIN_INPUT, 0) /* (W15) RGMII1_RD2 */
    			AM62AX_IOPAD(0x158, PIN_INPUT, 0) /* (V14) RGMII1_RD3 */
    			AM62AX_IOPAD(0x148, PIN_INPUT, 0) /* (AA16) RGMII1_RXC */
    			AM62AX_IOPAD(0x144, PIN_INPUT, 0) /* (AA15) RGMII1_RX_CTL */
    			AM62AX_IOPAD(0x134, PIN_INPUT, 0) /* (Y17) RGMII1_TD0 */
    			AM62AX_IOPAD(0x138, PIN_INPUT, 0) /* (V16) RGMII1_TD1 */
    			AM62AX_IOPAD(0x13c, PIN_INPUT, 0) /* (Y16) RGMII1_TD2 */
    			AM62AX_IOPAD(0x140, PIN_INPUT, 0) /* (AA17) RGMII1_TD3 */
    			AM62AX_IOPAD(0x130, PIN_INPUT, 0) /* (AB17) RGMII1_TXC */
    			AM62AX_IOPAD(0x12c, PIN_INPUT, 0) /* (W16) RGMII1_TX_CTL */
    		>;
    	};
    
    	main_mcasp1_pins_default: main-mcasp1-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x090, PIN_INPUT, 2) /* (L19) GPMC0_BE0n_CLE.MCASP1_ACLKX */
    			AM62AX_IOPAD(0x098, PIN_INPUT, 2) /* (R18) GPMC0_WAIT0.MCASP1_AFSX */
    			AM62AX_IOPAD(0x08c, PIN_OUTPUT, 2) /* (K19) GPMC0_WEn.MCASP1_AXR0 */
    			AM62AX_IOPAD(0x084, PIN_INPUT, 2) /* (L18) GPMC0_ADVn_ALE.MCASP1_AXR2 */
    		>;
    	};
    
    	main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x01d4, PIN_INPUT, 7) /* (C15) UART0_RTSn.GPIO1_23 */
    		>;
    	};
    
    	vddshv_sdio_pins_default: vddshv-sdio-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x07c, PIN_OUTPUT, 7) /* (M19) GPMC0_CLK.GPIO0_31 */
    		>;
    	};
    
    	ospi0_pins_default: ospi0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x000, PIN_OUTPUT, 0) /* (H24) OSPI0_CLK */
    			AM62AX_IOPAD(0x02c, PIN_OUTPUT, 0) /* (F23) OSPI0_CSn0 */
    			AM62AX_IOPAD(0x00c, PIN_INPUT, 0) /* (E25) OSPI0_D0 */
    			AM62AX_IOPAD(0x010, PIN_INPUT, 0) /* (G24) OSPI0_D1 */
    			AM62AX_IOPAD(0x014, PIN_INPUT, 0) /* (F25) OSPI0_D2 */
    			AM62AX_IOPAD(0x018, PIN_INPUT, 0) /* (F24) OSPI0_D3 */
    			AM62AX_IOPAD(0x01c, PIN_INPUT, 0) /* (J23) OSPI0_D4 */
    			AM62AX_IOPAD(0x020, PIN_INPUT, 0) /* (J25) OSPI0_D5 */
    			AM62AX_IOPAD(0x024, PIN_INPUT, 0) /* (H25) OSPI0_D6 */
    			AM62AX_IOPAD(0x028, PIN_INPUT, 0) /* (J22) OSPI0_D7 */
    			AM62AX_IOPAD(0x008, PIN_INPUT, 0) /* (J24) OSPI0_DQS */
    		>;
    	};
    };
    
    &mcu_pmx0 {
    	status = "okay";
    
    	pmic_irq_pins_default: pmic-irq-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_MCU_IOPAD(0x000, PIN_INPUT, 7) /* (E11) MCU_GPIO0_0 */
    		>;
    	};
    };
    
    &mcu_gpio0 {
    	status = "okay";
    };
    
    &main_i2c0 {
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_i2c0_pins_default>;
    	clock-frequency = <400000>;
    /*
    	typec_pd0: usb-power-controller@3f {
    		compatible = "ti,tps6598x";
    		reg = <0x3f>;
    
    		connector {
    			compatible = "usb-c-connector";
    			label = "USB-C";
    			self-powered;
    			data-role = "dual";
    			power-role = "sink";
    			port {
    				usb_con_hs: endpoint {
    					remote-endpoint = <&usb0_hs_ep>;
    				};
    			};
    		};
    	};
    */
    	tps659312: pmic@48 {
    		compatible = "ti,tps6593-q1";
    		reg = <0x48>;
    		ti,primary-pmic;
    		system-power-controller;
    
    		gpio-controller;
    		#gpio-cells = <2>;
    
    		pinctrl-names = "default";
    		pinctrl-0 = <&pmic_irq_pins_default>;
    		interrupt-parent = <&mcu_gpio0>;
    		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
    
    		buck123-supply = <&vcc_3v3_sys>;
    		buck4-supply = <&vcc_3v3_sys>;
    		buck5-supply = <&vcc_3v3_sys>;
    		ldo1-supply = <&vcc_3v3_sys>;
    		ldo2-supply = <&vcc_3v3_sys>;
    		ldo3-supply = <&buck5>;
    		ldo4-supply = <&vcc_3v3_sys>;
    
    		regulators {
    			buck123: buck123 {
    				regulator-name = "vcc_core";
    				regulator-min-microvolt = <715000>;
    				regulator-max-microvolt = <895000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			buck4: buck4 {
    				regulator-name = "vcc_1v1";
    				regulator-min-microvolt = <1100000>;
    				regulator-max-microvolt = <1100000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			buck5: buck5 {
    				regulator-name = "vcc_1v8_sys";
    				regulator-min-microvolt = <1800000>;
    				regulator-max-microvolt = <1800000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			ldo1: ldo1 {
    				regulator-name = "vddshv5_sdio";
    				regulator-min-microvolt = <3300000>;
    				regulator-max-microvolt = <3300000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			ldo2: ldo2 {
    				regulator-name = "vpp_1v8";
    				regulator-min-microvolt = <1800000>;
    				regulator-max-microvolt = <1800000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			ldo3: ldo3 {
    				regulator-name = "vcc_0v85";
    				regulator-min-microvolt = <850000>;
    				regulator-max-microvolt = <850000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    
    			ldo4: ldo4 {
    				regulator-name = "vdda_1v8";
    				regulator-min-microvolt = <1800000>;
    				regulator-max-microvolt = <1800000>;
    				regulator-boot-on;
    				regulator-always-on;
    			};
    		};
    	};
    };
    
    &main_i2c1 {
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_i2c1_pins_default>;
    	clock-frequency = <100000>;
    
    	exp1: gpio@22 {
    		compatible = "ti,tca6424";
    		reg = <0x22>;
    		gpio-controller;
    		#gpio-cells = <2>;
    		interrupt-parent = <&main_gpio1>;
    		interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
    		interrupt-controller;
    		#interrupt-cells = <2>;
    		pinctrl-names = "default";
    		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
    
    		gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
    				   "BT_EN_SOC", "MMC1_SD_EN",
    				   "VPP_EN", "EXP_PS_3V3_En",
    				   "EXP_PS_5V0_En", "EXP_HAT_DETECT",
    				   "GPIO_AUD_RSTn", "GPIO_eMMC_RSTn",
    				   "UART1_FET_BUF_EN", "BT_UART_WAKE_SOC",
    				   "GPIO_HDMI_RSTn", "CSI_GPIO0",
    				   "CSI_GPIO1", "WLAN_ALERTn",
    				   "HDMI_INTn", "TEST_GPIO2",
    				   "MCASP1_FET_EN", "MCASP1_BUF_BT_EN",
    				   "MCASP1_FET_SEL", "UART1_FET_SEL",
    				   "PD_I2C_IRQ", "IO_EXP_TEST_LED";
    	};
    
    	tlv320aic3106: audio-codec@1b {
    		#sound-dai-cells = <0>;
    		compatible = "ti,tlv320aic3106";
    		reg = <0x1b>;
    		ai3x-micbias-vg = <1>;	/* 2.0V */
    
    		/* Regulators */
    		AVDD-supply = <&vcc_3v3_sys>;
    		IOVDD-supply = <&vcc_3v3_sys>;
    		DRVDD-supply = <&vcc_3v3_sys>;
    		DVDD-supply = <&buck5>;
    	};
    
    	exp2: gpio@23 {
    		compatible = "ti,tca6424";
    		reg = <0x23>;
    		gpio-controller;
    		#gpio-cells = <2>;
    
    		gpio-line-names = "", "",
    				  "", "",
    				  "", "",
    				  "", "",
    				  "WL_LT_EN", "CSI_RSTz",
    				  "", "",
    				  "", "",
    				  "", "",
    				  "SPI0_FET_SEL", "SPI0_FET_OE",
    				  "RGMII2_BRD_CONN_DET", "CSI_SEL2",
    				  "CSI_EN", "AUTO_100M_1000M_CONFIG",
    				  "CSI_VLDO_SEL", "SoC_WLAN_SDIO_RST";
    	};
    
    	sii9022: bridge-hdmi@3b {
    		compatible = "sil,sii9022";
    		reg = <0x3b>;
    		interrupt-parent = <&exp1>;
    		interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
    		#sound-dai-cells = <0>;
    		sil,i2s-data-lanes = < 0 >;
    
    		ports {
    			#address-cells = <1>;
    			#size-cells = <0>;
    
    			port@0 {
    				reg = <0>;
    
    				sii9022_in: endpoint {
    					remote-endpoint = <&dpi1_out>;
    				};
    			};
    
    			port@1 {
    				reg = <1>;
    
    				sii9022_out: endpoint {
    					remote-endpoint = <&hdmi_connector_in>;
    				};
    			};
    		};
    	};
    };
    
    &main_i2c2 {
        #address-cells = <1>;
        #size-cells = <0>;
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_i2c2_pins_default>;
    	clock-frequency = <400000>;
    
        deserializer@28 {
            compatible = "maxim,max96714f";
    		#address-cells = <1>;
        	#size-cells = <0>;
            reg = <0x28>;
            powerdown-gpios = <&main_gpio0 89 GPIO_ACTIVE_LOW>;
    
            ports {
                #address-cells = <1>;
                #size-cells = <0>;
                port@0 {
                    reg = <0>;
                    max96714_gmsl_in: endpoint {
                        remote-endpoint = <&max96917f_gmsl_out>;
                    };
                };
    
                port@1 {
                    reg = <1>;
                    max96714_csi_out: endpoint {
                        data-lanes = <1 2 3 4>;
                        link-frequencies = /bits/ 64 <500000000>;
                        remote-endpoint = <&csi2_phy0>;
                    };
                };
            };
    
    		serializer:serializer@40 {
    			compatible = "maxim,max96717f";
    			#address-cells = <1>;
        		#size-cells = <0>;
    			#clock-cells = <0>;
    			reg = <0x40>;
    
    			ports {
    				#address-cells = <1>;
    				#size-cells = <0>;
    
    				port@0 {
    					reg = <0>;
    					max96717f_csi_in: endpoint {
    						bus-type = <4>;
    						data-lanes = <1 2 3 4>;
    						remote-endpoint = <&sensor_out>;
    					};
    				};
    
    				port@1 {
    					reg = <1>;
    					max96917f_gmsl_out: endpoint {
    						remote-endpoint = <&max96714_gmsl_in>;
    					};
    				};
    			};
    
    			camera: camera@36 {
    				compatible = "ovti,ox03f10";
    				reg = <0x36>;
    				clocks = <&serializer>;
    				clock-names = "xvclk";
    				assigned-clocks = <&serializer>;
    				assigned-clock-rates = <24000000>;
    			//	reset-gpios = <&serializer 2 GPIO_ACTIVE_HIGH>;
    				port {
    					sensor_out: endpoint {
    						remote-endpoint = <&max96717f_csi_in>;
    					};
    				};
    			};
    		};
        };
    };
    
    &cdns_csi2rx0 {
    	ports {
    		#address-cells = <1>;
    		#size-cells = <0>;
    		csi0_port0: port@0 {
    			reg = <0>;
    			status = "okay";
    			csi2_phy0: endpoint {
    				remote-endpoint = <&max96714_csi_out>;
    				clock-lanes = <0>;
    				data-lanes = <1 2 3 4>;
    				link-frequencies = /bits/ 64 <800000000>;
    			};
    		};
    	};
    };
    
    &ti_csi2rx0 {
    	status = "okay";
    };
    
    &dphy0 {
    	status = "okay";
    };
    
    &sdhci0 {
    	/* eMMC */
    	status = "okay";
    	non-removable;
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_mmc0_pins_default>;
    	disable-wp;
    };
    
    &sdhci1 {
    	/* SD/MMC */
    	status = "okay";
    	vqmmc-supply = <&vddshv_sdio>;
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_mmc1_pins_default>;
    	disable-wp;
    };
    
    &main_gpio0 {
    	status = "okay";
    };
    
    &main_gpio1 {
    	status = "okay";
    };
    
    &main_gpio_intr {
    	status = "okay";
    };
    
    &main_uart0 {
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_uart0_pins_default>;
    	interrupts-extended = <&gic500 GIC_SPI 178 IRQ_TYPE_LEVEL_HIGH>,
    			<&main_pmx0 0x1c8>; /* (D14) UART0_RXD PADCONFIG114 */
    	interrupt-names = "irq", "wakeup";
    };
    
    /* Main UART1 is used for TIFS firmware logs */
    &main_uart1 {
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_uart1_pins_default>;
    	status = "reserved";
    };
    
    /* Main Timer2 is used by C7x DSP */
    &main_timer2 {
    	status = "reserved";
    };
    
    
    
    &usbss0 {
    	status = "okay";
    };
    
    
    &usb0 {
    	dr_mode = "host";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_usb0_pins_default>;
    };
    
    &usbss1 {
    	status = "okay";
    };
    
    
    &usb1 {
    	dr_mode = "host";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_usb1_pins_default>;
    };
    
    &cpsw3g {
    	status = "disabled";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_rgmii1_pins_default>;
    
    	cpts@3d000 {
    		/* MAP HW3_TS_PUSH to GENF1 */
    		ti,pps = <2 1>;
    	};
    };
    
    &cpsw_port1 {
    	status = "okay";
    	phy-mode = "rgmii-rxid";
    	phy-handle = <&cpsw3g_phy0>;
    };
    
    &cpsw_port2 {
    	status = "disabled";
    };
    
    &cpsw3g_mdio {
    	status = "disabled";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_mdio1_pins_default>;
    
    	cpsw3g_phy0: ethernet-phy@0 {
    		reg = <0>;
    		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
    		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
    		ti,min-output-impedance;
    	};
    };
    
    &mcasp1 {
    	status = "okay";
    	#sound-dai-cells = <0>;
    
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_mcasp1_pins_default>;
    
    	op-mode = <0>;          /* MCASP_IIS_MODE */
    	tdm-slots = <2>;
    
    	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
    	       1 0 2 0
    	       0 0 0 0
    	       0 0 0 0
    	       0 0 0 0
    	>;
    	tx-num-evt = <0>;
    	rx-num-evt = <0>;
    };
    
    &dss {
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&main_dss0_pins_default>;
    };
    
    &dss_ports {
    	/* VP2: DPI Output */
    	hdmi0_dss: port@1 {
    		reg = <1>;
    
    		dpi1_out: endpoint {
    			remote-endpoint = <&sii9022_in>;
    		};
    	};
    };
    
    &mailbox0_cluster0 {
    	ti,mbox-num-fifos = <2>;
    	mbox_r5_0: mbox-r5-0 {
    		ti,mbox-rx = <0 0 0>;
    		ti,mbox-tx = <1 0 0>;
    	};
    };
    
    &mailbox0_cluster1 {
    	ti,mbox-num-fifos = <2>;
    	mbox_c7x_0: mbox-c7x-0 {
    		ti,mbox-rx = <0 0 0>;
    		ti,mbox-tx = <1 0 0>;
    	};
    };
    
    &mailbox0_cluster2 {
    	ti,mbox-num-fifos = <2>;
    	mbox_mcu_r5_0: mbox-mcu-r5-0 {
    		ti,mbox-rx = <0 0 0>;
    		ti,mbox-tx = <1 0 0>;
    	};
    };
    
    &c7x_0 {
    	mboxes = <&mailbox0_cluster1>, <&mbox_c7x_0>;
    	memory-region = <&c7x_0_dma_memory_region>,
    			<&c7x_0_memory_region>;
    };
    
    &wkup_r5fss0_core0 {
    	mboxes = <&mailbox0_cluster0>, <&mbox_r5_0>;
    	memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
    		<&wkup_r5fss0_core0_memory_region>;
    };
    
    &mcu_r5fss0_core0 {
    	mboxes = <&mailbox0_cluster2>, <&mbox_mcu_r5_0>;
    	memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
    			<&mcu_r5fss0_core0_memory_region>;
    };
    
    #define K3_TS_OFFSET(pa, val)	(0x4+(pa)*4) (0x10000 | val)
    
    &timesync_router {
    	status = "okay";
    	pinctrl-names = "default";
    	pinctrl-0 = <&cpsw_cpts>;
    
    	/* Use Time Sync Router to map GENF1 input to HW3_TS_PUSH output */
    	cpsw_cpts: cpsw-cpts {
    		pinctrl-single,pins = <
    			/* pps [cpsw cpts genf1] in17 -> out12 [cpsw cpts hw3_push] */
    			K3_TS_OFFSET(12, 17)
    			>;
    	};
    };
    
    &fss {
    	status = "okay";
    };
    
    &ospi0 {
    	pinctrl-names = "default";
    	pinctrl-0 = <&ospi0_pins_default>;
    
    	flash@0{
    		compatible = "spi-nand";
    		reg = <0x0>;
    		spi-tx-bus-width = <8>;
    		spi-rx-bus-width = <8>;
    		spi-max-frequency = <25000000>;
    		cdns,tshsl-ns = <60>;
    		cdns,tsd2d-ns = <60>;
    		cdns,tchsh-ns = <60>;
    		cdns,tslch-ns = <60>;
    		cdns,read-delay = <2>;
    
    		partitions {
    			compatible = "fixed-partitions";
    			#address-cells = <1>;
    			#size-cells = <1>;
    
    			partition@0 {
    				label = "ospi_nand.tiboot3";
    				reg = <0x0 0x80000>;
    			};
    
    			partition@80000 {
    				label = "ospi_nand.tispl";
    				reg = <0x80000 0x200000>;
    			};
    
    			partition@280000 {
    				label = "ospi_nand.u-boot";
    				reg = <0x280000 0x400000>;
    			};
    
    			partition@680000 {
    				label = "ospi_nand.env";
    				reg = <0x680000 0x40000>;
    			};
    
    			partition@6c0000 {
    				label = "ospi_nand.env.backup";
    				reg = <0x6c0000 0x40000>;
    			};
    
    			partition@2000000 {
    				label = "ospi_nand.rootfs";
    				reg = <0x2000000 0x5fc0000>;
    			};
    
    			partition@7fc0000 {
    				label = "ospi_nand.phypattern";
    				reg = <0x7fc0000 0x40000>;
    			};
    		};
    	};
    };
    

    I  want to use GPO0_89 to reset other chips, but the result is invalid. Therefore, I want to manually raise up through gpio tools, but it still doesn't work. How should I verify and control the output of this pin?By the way, i use custom hardware.

    I also try to set gpio value(1) without using gpioget, but it still cannot work.

    Best Regards,

    twl

  • Hi twl,

    There is no pinmuxing for GPIO0_89. For a simple test, can you try adding this?

    &main_pmx0 {
    	gpio0_pins_default: gpio0-default-pins {
    		pinctrl-single,pins = <
    			AM62AX_IOPAD(0x016c, PIN_INPUT, 7) /* (AA19) RGMII2_TD0.GPIO0_89 */
    		>;
    	};
    };
    
    &main_gpio0 { 
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&gpio0_pins_default>;
    };


    Then try the gpioset commands. Lets make sure that you can do basic functionality, then try to integrated it.

    Thanks,

    Anshu

  • Hi Anshu, 

    Your method is effective. I can control output of the pins now.

    But i have a question, when i control  GPIO0_89 to be high,i use the gpio tool in the application to get gpio, however,it is still low,enen if i measure the hareware is high. There is someting wrong with GPIO tools?

  • Hi twl,

    How it going? I met the same problem as yours.

    On my board, 'gpioset' are not available,. It will hang when I issue the command "gpioset -c gpiochip1 5=1". Just the same issue as below link:

    https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1416431/processor-sdk-am62p-how-to-control-gpio-in-sdk10-kernel-6-6

    So, I use gpio_set_value/gpio_get_value to test the related gpio.

    gpio_set_value 1/0 is good, but gpio_get_value always is 0. The same as you use the gpioget tool.

     

    Is there any update on your side? Wish you have resolved this issue.

    Best Regards,

    Tao