diff options
Diffstat (limited to 'recipes-demo/de10-nano-gpio-apps/files/find_gpio_leds_dt.src')
| -rw-r--r-- | recipes-demo/de10-nano-gpio-apps/files/find_gpio_leds_dt.src | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/recipes-demo/de10-nano-gpio-apps/files/find_gpio_leds_dt.src b/recipes-demo/de10-nano-gpio-apps/files/find_gpio_leds_dt.src new file mode 100644 index 0000000..37e46a2 --- /dev/null +++ b/recipes-demo/de10-nano-gpio-apps/files/find_gpio_leds_dt.src @@ -0,0 +1,34 @@ +function find_gpio_leds_dt () +{ + for NEXT in $(find -L /proc/device-tree -name "compatible" | sort); + do + cat ${NEXT} | grep -xz "gpio-leds" > /dev/null && { + LEDS_DIRNAME="$(dirname ${NEXT})"; + LEDS_COMPATIBLE="$(cat ${LEDS_DIRNAME}/compatible)"; + echo "${LEDS_DIRNAME}"; + echo -e "\tcompatible = '${LEDS_COMPATIBLE}'"; + for NEXT_LED in $(find -L "${LEDS_DIRNAME}" -name "gpios" | sort); + do + NEXT_LED_DIR="$(dirname ${NEXT_LED})"; + echo "${NEXT_LED_DIR}"; + LEDS_GPIOS="$(hexdump -v -e '"0x" 4/1 "%02x" " "' "${NEXT_LED}")"; + CONTROLLER_PHANDLE_HEX=$(echo ${LEDS_GPIOS} | cut -d ' ' -f 1); + GPIO_BIT_HEX=$(echo ${LEDS_GPIOS} | cut -d ' ' -f 2); + INVERTED_FLAG_HEX=$(echo ${LEDS_GPIOS} | cut -d ' ' -f 3); + printf " gpios = ('%d', '%d', '%d') : ('%s', '%s', '%s')\n" "${CONTROLLER_PHANDLE_HEX}" "${GPIO_BIT_HEX}" "${INVERTED_FLAG_HEX}" "controller" "bit" "flag"; + GPIO_CONTROLLER="unknown"; + CONTROLLER_PHANDLE_DEC="$(printf "%d" "${CONTROLLER_PHANDLE_HEX}")"; + for NEXT in $(find -L /proc/device-tree -name "phandle" | sort); + do + PHANDLE_HEX="$(hexdump -v -e '"0x" 4/1 "%02x"' "${NEXT}")"; + PHANDLE_DEC="$(printf "%d" "${PHANDLE_HEX}")"; + [ "${PHANDLE_DEC}" -eq "${CONTROLLER_PHANDLE_DEC}" ] && { + GPIO_CONTROLLER="$(dirname ${NEXT})" + }; + done; + printf " controller = '%s'\n" "${GPIO_CONTROLLER}"; + done + }; + done +} + |