On Thu, Aug 18, 2016 at 3:39 PM, Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> wrote: > On Thu, Aug 18, 2016 at 02:48:52PM -0500, Rob Herring wrote: >> On Thu, Aug 18, 2016 at 2:30 PM, Dmitry Torokhov >> <dmitry.torokhov@xxxxxxxxx> wrote: >> > On Wed, Aug 17, 2016 at 10:59:00AM +0200, Hans de Goede wrote: >> >> The silead gsl1680 driver / binding supports a whole series of devices, >> >> list the compatibles for all of them in the binding. >> >> >> >> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> >> >> --- >> >> Changes in v2: >> >> -Drop the "silead,mssl1680" compatible thing, the "mssl1680" name is an >> >> ACPI thing and does not belong in the dt bindings >> >> --- >> >> .../devicetree/bindings/input/touchscreen/silead_gsl1680.txt | 4 ++++ >> >> 1 file changed, 4 insertions(+) >> >> >> >> diff --git a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt >> >> index b0eca54..ad7f41a 100644 >> >> --- a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt >> >> +++ b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt >> >> @@ -2,6 +2,10 @@ >> >> >> >> Required properties: >> >> - compatible : "silead,gsl1680" >> >> + or: "silead,gsl1688" >> >> + or: "silead,gsl3670" >> >> + or: "silead,gsl3675" >> >> + or: "silead,gsl3692" >> > >> > Hmm, why do we need to document all compatible strings? We usually have >> > only least common denominator in drievr, and device tree uses form: >> > >> > compatible = "silead,<exact model>", "silead,gsl1680"; >> > >> > Rob? >> >> Because we require them in dts files even if the OS only uses the fallback. > > So how exactly should it be documented? I mean if there were more than 1 > OS they might have been using different fallbacks. How do we decide > which entry should be "true" fallback? It shouldn't matter which one an OS uses. There's typically only the specific one and then a generic or 1st compatible chip one. This is exactly why they need to be documented (and in a single place, looking at you u-boot), so there is no confusion as to what compatibles are allowed/valid for each platform. 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
