On 21 May 04:43 PM, Grant Likely wrote: [..] > > Yet another approach. How about this patch? If the unit address cannot > be translated, then append the translated name of the parent. > [..] > > commit 177e5ff131639c8568248e5b9b2380066ce305d6 > Author: Grant Likely <grant.likely@xxxxxxxxxx> > Date: Wed May 21 15:40:31 2014 +0900 > > of: Ensure unique names without sacrificing determinism > > The way the driver core is implemented, every device using the same bus > type is required to have a unique name because a symlink to each device > is created in the appropriate /sys/bus/*/devices directory, and two > identical names causes a collision. > > The current code handles the requirement by using an globally > incremented counter that is appended to the device name. It works, but > it means any change to device registration will change the assigned > numbers. Instead, if we build up the name by using information from the > parent nodes, then it can be guaranteed to be unique without adding a > random number to the end of it. > > Signed-off-by: Grant Likely <grant.likely@xxxxxxxxxx> > This solves the issue I complained about. Now the names of the devices match the name of nodes, so the system knows what names to expect. Before: $ ls /sys/devices/ 44e10800.pinmux gpio-keys.8 pmu.0 system ARMv7 Cortex-A8 hdmi.5 rotary-encoder.9 userhelper.10 backlight.6 ocp.3 soc.1 virtual breakpoint panel.7 soc0 fixedregulator.4 platform software After: $ ls /sys/devices/ 44e10800.pinmux gpio-keys pmu system ARMv7 Cortex-A8 hdmi rotary-encoder userhelper backlight ocp soc virtual breakpoint panel soc0 fixedregulator@0 platform software Tested-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx> It would be great if this patch could be merged. Thanks a lot Grant, -- Ezequiel Garcia, VanguardiaSur www.vanguardiasur.com.ar -- 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
