On Thu, Dec 10, 2015 at 3:36 PM, Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@xxxxxxxxxx> wrote: > On 12/10/2015 04:21 PM, Rob Herring wrote: >> Having a common connector interface across different platforms can be >> problematic for determining which SOC device is connected to which >> connector pins. The standard DT property "label" is intended to provide >> a human readable name for a device and can be used to provide this >> information. Then userspace can can read the label to determine the >> device mapping. For example: >> >> for f in $(ls -d /sys/class/tty/tty*); do >> label=$(cat $f/device/of_node/label) >> if [ "$label" = "LS-UART1" ]; then >> # you've found UART1, so do something with it. >> # $f/dev is the major:minor for the /dev node >> fi >> done >> >> This series adds labels on hikey and dragonboard 410c devices for the >> low speed and high speed connectors. Not tested at all. > > should we then use the line-name property on the GPIOs to have a common naming > convention across all 96Boards boards? I left GPIOs out purpose, but they do need to be handled. I'm not certain that gpio-hogs is what we want to use here. The other cases have no s/w impact as label is ignored. The same is not true of gpio-hogs. Also, if we consider that we may want to describe GPIO connections to daughterboards with DT overlays, then we wound not want the gpio-hogs in the DT. That gets into a whole other set of issues needing a way to remap connector signals to have overlays which work across different base boards. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
