On Tue, Nov 02, 2021 at 05:06:15PM +0100, Rafał Miłecki wrote: > From: Rafał Miłecki <rafal@xxxxxxxxxx> > > It's a block implementing few time related functions depending on a > (SoC specific) variant. At this point there is ready binding for a > watchdog only. Work on remaining subblocks (e.g. "reg" based reboot) is > in progress. > > Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx> > --- > V2: Update $id, description, compatible, example & commit message > --- > .../devicetree/bindings/mfd/brcm,twd.yaml | 62 +++++++++++++++++++ > 1 file changed, 62 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mfd/brcm,twd.yaml > > diff --git a/Documentation/devicetree/bindings/mfd/brcm,twd.yaml b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml > new file mode 100644 > index 000000000000..ed167055be06 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml > @@ -0,0 +1,62 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mfd/brcm,twd.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Broadcom's Timer-Watchdog (aka TWD) > + > +maintainers: > + - Rafał Miłecki <rafal@xxxxxxxxxx> > + > +description: | > + Broadcom has a Timer-Watchdog block used in multiple SoCs (e.g., BCM4908, > + BCM63xx, BCM7038). There are few variants available (they differ slightly in > + registers layout). This block consists of: timers, watchdog and optionally a > + software reset handler. > + > +properties: > + compatible: > + items: > + - enum: > + - brcm,bcm4908-twd > + - brcm,bcm7038-twd > + - const: brcm,twd I don't think you need this given you don't expect to have a driver for this other than syscon driver. > + - const: simple-mfd > + - const: syscon > + > + reg: > + maxItems: 1 > + > + ranges: true > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 1 > + > +patternProperties: > + '^watchdog@[a-f0-9]+$': > + $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml > + > +additionalProperties: false > + > +required: > + - reg > + > +examples: > + - | > + timer-mfd@ff800400 { > + compatible = "brcm,bcm4908-twd", "brcm,twd", "simple-mfd", "syscon"; > + reg = <0xff800400 0x4c>; > + ranges = <0x00000000 0xff800400 0x4c>; > + > + #address-cells = <1>; > + #size-cells = <1>; > + > + watchdog@28 { > + compatible = "brcm,bcm7038-wdt"; > + reg = <0x28 0x8>; > + }; > + }; > -- > 2.31.1 > >
