core/linux-raspberrypi: Update Device Tree config

* fix wrong name of overlay for w1-gpio using external pullup
* update w1-gpio(-pullup) parameters according to /boot/overlays/README
This commit is contained in:
Michael Lass 2015-03-02 17:33:26 +01:00
parent b00a080a11
commit a5320f0394

View file

@ -68,20 +68,24 @@
#device_tree_param=gpio_in_pull=down
# Uncomment to enable the w1-gpio Onewire interface module
# Use this overlay if you *don't* need a pin to drive an external pullup
# N.B. The parasitic power feature is not yet functional using DT.
# Use this overlay if you *don't* need a pin to drive an external pullup.
# Params: gpiopin GPIO pin for I/O (default "4")
# pullup Non-zero, "on", or "y" to enable the parasitic
# power (2-wire, power-on-data) feature
#device_tree_overlay=w1-gpio
#device_tree_param=gpiopin=4
#device_tree_param=pullup=on
# Uncomment to enable the w1-gpio Onewire interface module
# Use this overlay if you *do* need a pin to drive an external pullup
# N.B. The parasitic power feature is not yet functional using DT.
# Use this overlay if you *do* need a pin to drive an external pullup.
# Params: gpiopin GPIO pin for I/O (default "4")
# pullup GPIO pin for external pullup (default "5")
#device_tree_overlay=w1-gpio
# pullup Non-zero, "on", or "y" to enable the parasitic
# power (2-wire, power-on-data) feature
# extpullup GPIO pin for external pullup (default "5")
#device_tree_overlay=w1-gpio-pullup
#device_tree_param=gpiopin=4
#device_tree_param=pullup=5
#device_tree_param=pullup=on
#device_tree_param=extpullup=5
# Uncomment to enable pps-gpio (pulse-per-second time signal via GPIO)
# Params: gpiopin GPIO input pin (default "18")