Hi TI,
I am using package am335x-evm-sdk-src-07.00.00.00.tar.gz kernel linux-3.12.10-ti2013.12.01
I create GPIO input in the DeviceTree like the following:
arch/arm/boot/dts/am335x-bone-common.dtsi
am33xx_pinmux: pinmux@44e10800 {
pinctrl-names = "default";
pinctrl-0 = <&clkout2_pin>;
...................
user_leds_default: falcon_in_pins {
pinctrl-single,pins = <
0x1a4 (PIN_INPUT_PULLUP | MUX_MODE7) /* B_TYPE/mcasp0_fsr/gpio3-19 */
0x030 (PIN_INPUT_PULLUP | MUX_MODE7) /* INT7/gpmc_ad12/gpio1-12 */
0x034 (PIN_INPUT_PULLUP | MUX_MODE7) /* INT6/gpmc_ad13/gpio1-13 */
0x038 (PIN_INPUT_PULLUP | MUX_MODE7) /* INT5/gpmc_ad14/gpio1-14 */
0x03c (PIN_INPUT_PULLUP | MUX_MODE7) /* INT8/gpmc_ad15/gpio1-15 */
0x19c (PIN_INPUT_PULLUP | MUX_MODE7) /* INT4/mcasp0_ahclkr/gpio3-17 */
0x064 (PIN_INPUT_PULLUP | MUX_MODE7) /* IGN/gpmc_a9/gpio1-25 */
0x198 (PIN_INPUT_PULLUP | MUX_MODE7) /* BT_F2/mcasp0_axr0/gpio3-16 */
0x0e4 (PIN_INPUT_PULLUP | MUX_MODE7) /* WF_IRQ/lcd_hsync/gpio2-23 */
0x028 (PIN_INPUT_PULLUP | MUX_MODE7) /* GPS_ANT_DET/gpmc_ad10/gpio0-26 */
0x020 (PIN_INPUT_PULLUP | MUX_MODE7) /* ACC_INT1/gpmc_ad8/gpio0-22 */
0x02c (PIN_INPUT_PULLUP | MUX_MODE7) /* MO_GPIO8/gpmc_ad11/gpio0-27 */
0x07c (PIN_INPUT_PULLUP | MUX_MODE7) /* MO_GPRS_DET/gpmc_csn0/gpio1-29 */
0x054 (PIN_INPUT_PULLUP | MUX_MODE7) /* WD_OUT/mmc2_dat3/gpio1-21 */
>;
};
ocp {
.................
falcon {
compatible = "gpio-leds";
pinctrl-names = "default";
pinctrl-0 = <&user_leds_default>;
status = "okay";
};
I use the command
pin 105 (44e109a4.0) 00000037 pinctrl-single
echo 105 > /sys/class/gpio/export
cat /sys/class/gpio/gpio105/direction
in
cat /sys/class/gpio/gpio105/value
0
Who can tell what's wrong with DeviceTree for GPIO inputs?
Thank you!
desmond
