Tool/software: Linux
Hi,
I am using a custom AM335x board and I am facing issues in controlling some gpios. I have added the GPIOs(GPIO2_27=91 and GPIO2_28=92 in my_gpio2_pins_default entry) to dts file and made sure that the pins are not used anywhere else in the dts file. GPIO 91 and 92 is connected to another module where 91 is pulled down 92 is pulled up internally in the module. When I try to change the status using the above commands, the pin statuses does not change.
I am able to control other gpios in the dts file (not all of them are tested but the one's that I tried out are working). Kindly let me know if I need to do anything else to make it work. The GPIOs 91 and 92 are by default used for SD card interface. I have changed it to work as a GPIO since I dont use SD card interface in my board. Any help would be appreciated.
My dts file is this
/* * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /dts-v1/; #include "am33xx.dtsi" #include <dt-bindings/interrupt-controller/irq.h> / { model = "CALIXTO-AM335X-NXT"; compatible = "ti,am335x-evm", "ti,am33xx"; cpus { cpu@0 { cpu0-supply = <&vdd_mpu_supply>; }; }; memory { device_type = "memory"; reg = <0x80000000 0x10000000>; /* 256MB */ }; vmmcsd_fixed: fixedregulator@1 { compatible = "regulator-fixed"; regulator-name = "vmmcsd-regulator"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; enable-active-high; regulator-always-on; }; vdd_mpu_supply: fixedregulator@2 { compatible = "regulator-fixed"; regulator-name = "vdd-mpu-regulator"; regulator-min-microvolt = <1262000>; regulator-max-microvolt = <1262000>; regulator-boot-on; regulator-always-on; }; core_audio_supply: fixedregulator-audiocore { compatible = "regulator-fixed"; regulator-name = "core_audio_supply"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-boot-on; }; io_audio_supply: fixedregulator-audioio { compatible = "regulator-fixed"; regulator-name = "io_audio_supply"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-boot-on; }; leds { pinctrl-names = "default", "sleep"; pinctrl-0 = <&user_leds_default>; pinctrl-1 = <&user_leds_sleep>; compatible = "gpio-leds"; led@1 { label = "led1"; gpios = <&gpio3 17 GPIO_ACTIVE_HIGH>; linux,default-trigger = "heartbeat"; default-state = "on"; }; }; }; &am33xx_pinmux { pinctrl-names = "default"; pinctrl-0 = <&clkout2_pin>; user_leds_default: user_leds_default { pinctrl-single,pins = < 0x19C ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* mcasp0_ahclkr.gpio3_17 */ >; }; user_leds_sleep: user_leds_sleep { pinctrl-single,pins = < 0x19C ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* mcasp0_ahclkr.gpio3_17 */ >; }; my_gpio0_pins_default: my_gpio0_pins_default{ pinctrl-single,pins = < 0x060 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* gpmc_ad11.gpio0_27 */ 0x018 ( PIN_OUTPUT | MUX_MODE7 ) /* lcd_data13.gpio0_9 */ 0x01C ( PIN_OUTPUT | MUX_MODE7 ) /* lcd_data14.gpio0_10 */ 0x030 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* lcd_data12.gpio0_8 */ >; }; my_gpio1_pins_default: my_gpio1_pins_default{ pinctrl-single,pins = < 0x040 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_ad12.gpio1_12 */ 0x008 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_ad2.gpio1_2 */ 0x07C ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_csn0.gpio1_29 */ 0x080 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_csn1.gpio1_30 */ 0x084 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_csn2.gpio1_31 */ 0x078 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_be1n.gpio1_28 */ 0x000 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_ad0.gpio1_0 */ 0x004 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_ad1.gpio1_1 */ 0x014 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_ad5.gpio1_5 */ 0x018 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_ad6.gpio1_6 */ 0x01C ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_ad7.gpio1_7 */ 0x050 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_a4.gpio1_20 */ 0x054 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_a5.gpio1_21 */ 0x040 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_a0.gpio1_16 */ 0x038 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* gpmc_ad14.gpio1_14 */ 0x070 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_a10.gpio1_26 */ 0x074 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_a11.gpio1_27 */ >; }; my_gpio2_pins_default: my_gpio2_pins_default{ pinctrl-single,pins = < 0x0F8 ( PIN_OUTPUT | MUX_MODE7 ) /* mmc0_dat1.gpio2_28 */ 0x0F4 ( PIN_OUTPUT | MUX_MODE7 ) /* mmc0_dat2.gpio2_27*/ 0x0E8 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_pclk.gpio2_24 */ 0x0B4 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_data5.gpio2_11 */ 0x0E0 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_vsync.gpio2_22*/ 0x0B0 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_data4.gpio2_10*/ 0x0AC ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_data3.gpio2_9*/ 0x0F0 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* mmc0_dat3.gpio2_26 - */ 0x0BC ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_data7.gpio2_13 */ 0x098 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_wen.gpio2_4 */ 0x094 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_oen_ren.gpio2_3 */ 0x090 ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_advn_ale.gpio2_2 */ 0x09C ( PIN_OUTPUT | MUX_MODE7 ) /* gpmc_be0n_cle.gpio2_5*/ 0x0B8 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_data6.gpio2_12 */ 0x0A8 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* lcd_data2.gpio2_8 */ 0x0E4 ( PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* lcd_hsync.gpio2_23*/ >; }; my_gpio3_pins_default: my_gpio3_pins_default{ pinctrl-single,pins = < 0x1A4 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* mcasp0_fsr.gpio3_19 */ 0x1A0 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* mcasp0_aclkr.gpio3_18*/ >; }; uart0_pins: pinmux_uart0_pins { pinctrl-single,pins = < 0x170 (PIN_INPUT_PULLUP | MUX_MODE0) /* uart0_rxd.uart0_rxd */ 0x174 (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* uart0_txd.uart0_txd */ >; }; uart1_pins: pinmux_uart1_pins { pinctrl-single,pins = < 0x178 (PIN_INPUT | MUX_MODE0) /* uart1_ctsn.uart1_ctsn */ 0x17C (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* uart1_rtsn.uart1_rtsn */ 0x180 (PIN_INPUT_PULLUP | MUX_MODE0) /* uart1_rxd.uart1_rxd */ 0x184 (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* uart1_txd.uart1_txd */ >; }; i2c0_pins: pinmux_i2c0_pins { pinctrl-single,pins = < 0x188 (PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_sda.i2c0_sda */ 0x18c (PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_scl.i2c0_scl */ >; }; uart4_pins: pinmux_uart4_pins { pinctrl-single,pins = < 0x168 (PIN_INPUT_PULLUP | MUX_MODE1) /* uart0_ctsn.uart4_rxd */ 0x16C (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* uart0_rtsn.uart4_txd */ >; }; uart3_pins: pinmux_uart3_pins { pinctrl-single,pins = < 0x160 (PIN_INPUT_PULLUP | MUX_MODE1) /* spi0_cs1.uart3_rxd */ 0x138 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* mii1_rxd2.uart3_txd */ >; }; uart5_pins: pinmux_uart5_pins { pinctrl-single,pins = < 0x0C4 (PIN_INPUT_PULLUP | MUX_MODE4) /* lcd_data9.uart5_rxd */ 0x0C0 (PIN_OUTPUT_PULLDOWN | MUX_MODE4) /* lcd_data8.uart5_txd */ >; }; uart2_pins: pinmux_uart2_pins { pinctrl-single,pins = < 0x100 (PIN_INPUT_PULLUP | MUX_MODE3) /* mmc0_clk.mmc0_clk.uart2_rxd */ 0x104 (PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* mmc0_cmd.mmc0_cmd.uart2_txd */ >; }; clkout2_pin: pinmux_clkout2_pin { pinctrl-single,pins = < 0x1b4 (PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* xdma_event_intr1.clkout2 */ >; }; emmc_pins: pinmux_emmc_pins { pinctrl-single,pins = < 0x8C (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_clk.mmc2_clk */ 0x88 (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_csn3.mmc2_cmd */ 0x30 (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_ad12.mmc2_dat0 */ 0x34 (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_ad13.mmc2_dat1 */ 0x38 (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_ad14.mmc2_dat2 */ 0x3C (PIN_INPUT_PULLUP | MUX_MODE3) /* gpmc_ad15.mmc2_dat3 */ >; }; cpsw_default: cpsw_default { pinctrl-single,pins = < /* Slave 1 */ 0x10c (PIN_INPUT_PULLDOWN | MUX_MODE1) /* mii1_crs.rmii1_crs_dv */ 0x110 (PIN_INPUT_PULLDOWN | MUX_MODE1) /* mii1_rxerr.mii1_rxerr */ 0x114 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* mii1_txen.mii1_txen */ 0x124 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* mii1_txd1.mii1_txd1 */ 0x128 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* mii1_txd0.mii1_txd0 */ 0x13c (PIN_INPUT_PULLDOWN | MUX_MODE1) /* mii1_rxd1.mii1_rxd2 */ 0x140 (PIN_INPUT_PULLDOWN | MUX_MODE1) /* mii1_rxd0.mii1_rxd0 */ 0x144 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* rmii1_refclk.rmii1_refclk */ >; }; cpsw_sleep: cpsw_sleep { pinctrl-single,pins = < /* Slave 1 reset value */ 0x10c (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x110 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x114 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x124 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x128 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x13c (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x140 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x144 (PIN_INPUT_PULLDOWN | MUX_MODE7) >; }; davinci_mdio_default: davinci_mdio_default { pinctrl-single,pins = < /* MDIO */ 0x148 (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0) /* mdio_data.mdio_data */ 0x14c (PIN_OUTPUT_PULLUP | MUX_MODE0) /* mdio_clk.mdio_clk */ >; }; davinci_mdio_sleep: davinci_mdio_sleep { pinctrl-single,pins = < /* MDIO reset value */ 0x148 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x14c (PIN_INPUT_PULLDOWN | MUX_MODE7) >; }; spi0_pins: pinmux_spi0_pins { pinctrl-single,pins = < 0x150 ( PIN_INPUT_PULLUP | MUX_MODE0 ) /* (A17) spi0_sclk.spi0_sclk */ 0x154 ( PIN_INPUT_PULLUP | MUX_MODE0 ) /* (B17) spi0_d0.spi0_d0 */ 0x158 ( PIN_OUTPUT_PULLUP | MUX_MODE0 ) /* (B16) spi0_d1.spi0_d1 */ 0x15c ( PIN_OUTPUT_PULLUP | MUX_MODE0 ) /* (A16) spi0_cs0.spi0_cs0 */ >; }; ecap0_pins_default: ecap0_pins_default { pinctrl-single,pins = < 0x164 ( PIN_OUTPUT | MUX_MODE0 ) /* (E18) eCAP0_in_PWM0_out.eCAP0_in_PWM0_out */ >; }; ehrpwm0_pins: pinmux_ehrpwm0_pins { pinctrl-single,pins = < 0x190 ( PIN_OUTPUT | MUX_MODE1 ) /* (U3) mmc0_sdcd.ehrpwm0A */ 0x194 ( PIN_OUTPUT | MUX_MODE1 ) /* (U4) mcasp0_fsx.ehrpwm0B */ >; }; ehrpwm1_pins: pinmux_ehrpwm1_pins { pinctrl-single,pins = < 0x0C8 ( PIN_OUTPUT | MUX_MODE2 ) /* (U3) lcd_data10.ehrpwm1A */ 0x0CC ( PIN_OUTPUT | MUX_MODE2 ) /* (U4) lcd_data11.ehrpwm1B */ >; }; ehrpwm2_pins: pinmux_ehrpwm2_pins { pinctrl-single,pins = < 0x0A0 ( PIN_OUTPUT | MUX_MODE3 ) /* (R1) lcd_data0.ehrpwm2A */ 0x0A4 ( PIN_OUTPUT | MUX_MODE3 ) /* (R2) lcd_data1.ehrpwm2B */ >; }; }; &uart0 { pinctrl-names = "default"; pinctrl-0 = <&uart0_pins>; status = "okay"; }; &uart1 { pinctrl-names = "default"; pinctrl-0 = <&uart1_pins>; status = "okay"; }; &uart2 { pinctrl-names = "default"; pinctrl-0 = <&uart2_pins>; status = "okay"; }; &uart3 { pinctrl-names = "default"; pinctrl-0 = <&uart3_pins>; status = "okay"; }; &uart4 { pinctrl-names = "default"; pinctrl-0 = <&uart4_pins>; status = "okay"; }; &uart5 { pinctrl-names = "default"; pinctrl-0 = <&uart5_pins>; status = "okay"; }; &i2c0 { pinctrl-names = "default"; pinctrl-0 = <&i2c0_pins>; status = "okay"; clock-frequency = <400000>; tlv320aic3106: tlv320aic3106@18 { compatible = "ti,tlv320aic3106"; reg = <0x18>; ai3x-micbias-vg = <1>; status = "okay"; /* Regulators */ AVDD-supply = <&core_audio_supply>; IOVDD-supply = <&core_audio_supply>; DRVDD-supply = <&core_audio_supply>; DVDD-supply = <&io_audio_supply>; }; pcf8563: pcf8563@51 { compatible = "nxp,pcf8563"; reg = <0x51>; }; }; &mmc3 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&emmc_pins>; vmmc-supply = <&vmmcsd_fixed>; bus-width = <4>; ti,non-removable; dmas = <&edma_xbar 12 0 1 &edma_xbar 13 0 2>; dma-names = "tx", "rx"; }; &tscadc { status = "okay"; tsc { ti,wires = <4>; ti,x-plate-resistance = <200>; ti,coordinate-readouts = <5>; ti,wire-config = <0x00 0x11 0x22 0x33>; }; adc { ti,adc-channels = <4 5 6 7>; }; }; &mac { slaves = <1>; pinctrl-names = "default", "sleep"; pinctrl-0 = <&cpsw_default>; pinctrl-1 = <&cpsw_sleep>; status = "okay"; }; &davinci_mdio { pinctrl-names = "default", "sleep"; pinctrl-0 = <&davinci_mdio_default>; pinctrl-1 = <&davinci_mdio_sleep>; status = "okay"; }; &cpsw_emac0 { phy_id = <&davinci_mdio>, <0>; phy-mode = "rmii"; }; &phy_sel { rmii-clock-ext; }; &rtc { system-power-controller; }; /* &lcdc { status = "okay"; }; */ &sgx { status = "okay"; }; &usb { status = "okay"; }; &usb_ctrl_mod { status = "okay"; }; &usb0_phy { status = "okay"; }; &usb1_phy { status = "okay"; }; &usb0 { status = "okay"; dr_mode = "peripheral"; }; &usb1 { status = "okay"; dr_mode = "host"; }; &cppi41dma { status = "okay"; }; /* * SPI Flash (1MiB) * 0x000000 - 0x01FFFF : SPL (128KiB) * 0x020000 - 0x09FFFF : U-Boot (512KiB) * 0x0A0000 - 0x0BFFFF : First copy of U-Boot Environment (128KiB) * 0x0C0000 - 0x0DFFFF : Second copy of U-Boot Environment (128KiB) */ &spi0 { pinctrl-names = "default"; pinctrl-0 = <&spi0_pins>; status = "okay"; flash: s25fl064k@0 { #address-cells = <1>; #size-cells = <1>; compatible = "st,s25fl064k"; spi-max-frequency = <25000000>; reg = <0>; partition@0 { label = "u-boot-spl"; reg = <0x000000 0x020000>; }; partition@1 { label = "u-boot"; reg = <0x020000 0x080000>; }; partition@2 { label = "env1"; reg = <0x0A0000 0x010000>; }; partition@3 { label = "env2"; reg = <0x0B0000 0x010000>; }; }; }; &epwmss0 { status = "okay"; ecap0: ecap@48300100 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&ecap0_pins_default>; }; ehrpwm0: ehrpwm@48300200 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&ehrpwm0_pins>; }; }; &epwmss1 { status = "okay"; ehrpwm1: ehrpwm@48302200 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&ehrpwm1_pins>; }; }; &epwmss2 { status = "okay"; ehrpwm2: ehrpwm@48304200 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&ehrpwm2_pins>; }; };
I am trying to control the pins in userspace using
echo 91 > /sys/class/gpio/export
echo 92 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio91/direction
echo out > /sys/class/gpio/gpio92/direction
echo1 > /sys/class/gpio/gpio91/value
echo 0 > /sys/class/gpio/gpio92/value
