Changes between Version 36 and Version 37 of gpio

Timestamp:

07/05/2024 04:19:40 PM (3 months ago)

Author:

Tim Harvey

Comment:

added note about U-Boot LED support

gpio

@@ -672 +672 @@
 [=#led_class]
 == GPIO for LED's
-While SoC based GPIO's are often used for LED's on various Gateworks boards, there is a Linux gpio-led driver which has a sysfs interface for manipulating the LED's in Linux:
+SoC based GPIO's are often used for LED's on various Gateworks boards.
+
+For Linux the {{{gpio-led}}} driver supports GPIO based LED's which has a sysfs interface for manipulating the LED's in Linux:
  * see wiki:linux/led
+
+For U-Boot the {{{gpio-led}}} driver is partially supported in U-Boot proper (heartbeat trigger is currently not supported in U-Boot but LED's will be enabled). There is no LED support currently in the U-Boot SPL so if your board uses U-Boot SPL and you want LED support earlier in the boot process you need to add GPIO configuration to an early function such as board_init_f().
 
 [=#wlan_dis]