Le Thu, 29 Jul 2021 15:19:19 -0600, Rob Herring <robh@xxxxxxxxxx> a écrit : > On Fri, Jul 23, 2021 at 03:52:39PM +0200, Clément Léger wrote: > > This patch adds documentation for the "syscon-smc" compatible which > > describes a syscon using a SMC regmap instead of a MMIO one. This > > allows accessing system controllers that are set as secure by using > > SMC handled by the secure monitor. > > > > Signed-off-by: Clément Léger <clement.leger@xxxxxxxxxxx> > > --- > > .../devicetree/bindings/mfd/syscon-smc.yaml | 57 > > +++++++++++++++++++ 1 file changed, 57 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/mfd/syscon-smc.yaml > > > > diff --git a/Documentation/devicetree/bindings/mfd/syscon-smc.yaml > > b/Documentation/devicetree/bindings/mfd/syscon-smc.yaml new file > > mode 100644 index 000000000000..6ce1392c5e7f > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/mfd/syscon-smc.yaml > > @@ -0,0 +1,57 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/mfd/syscon-smc.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: System Controller Registers R/W via SMC Device Tree Bindings > > + > > +description: | > > + System controller SMC node represents a register region > > containing a set > > + of miscellaneous registers accessed through a secure monitor. > > + The typical use-case is the same as the syscon one but when > > running with a > > + secure monitor. > > + > > +maintainers: > > + - Lee Jones <lee.jones@xxxxxxxxxx> > > + > > +properties: > > + compatible: > > + anyOf: > > + - items: > > + - enum: > > + - atmel,sama5d2-sfr > > + > > + - const: syscon-smc > > I regret having 'syscon' as a compatible, so nak on a 2nd flavor of > it. It's only purpose is a hint to Linux to automagically create a > regmap for you. Indeed. > > All you need is the specific compatible, atmel,sama5d2-sfr, and you > can imply the rest of this from it. That's assuming the conclusion is > a register read/write interface on SMC is a good idea, but I don't > think it is. Ok noted, I'll try to find something else to implement that. Clément > > Rob
