Changes between Version 36 and Version 37 of gpio


Ignore:
Timestamp:
07/05/2024 04:19:40 PM (9 months ago)
Author:
Tim Harvey
Comment:

added note about U-Boot LED support

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  • gpio

    v36 v37  
    672672[=#led_class]
    673673== GPIO for LED's
    674 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:
     674SoC based GPIO's are often used for LED's on various Gateworks boards.
     675
     676For Linux the {{{gpio-led}}} driver supports GPIO based LED's which has a sysfs interface for manipulating the LED's in Linux:
    675677 * see wiki:linux/led
     678
     679For 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().
    676680
    677681[=#wlan_dis]