On Mon, Nov 11, 2024 at 03:59:37PM +0200, Ciprian Costea wrote: > From: Ciprian Marian Costea <ciprianmarian.costea@xxxxxxxxxxx> > > RTC tracks clock time during system suspend and it is used as a wakeup > source on S32G2/S32G3 architecture. > > RTC from S32G2/S32G3 is not battery-powered and it is not kept alive > during system reset. > > Co-developed-by: Bogdan-Gabriel Roman <bogdan-gabriel.roman@xxxxxxx> > Signed-off-by: Bogdan-Gabriel Roman <bogdan-gabriel.roman@xxxxxxx> > Co-developed-by: Ghennadi Procopciuc <ghennadi.procopciuc@xxxxxxx> > Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@xxxxxxx> > Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@xxxxxxxxxxx> > --- > .../devicetree/bindings/rtc/nxp,s32g-rtc.yaml | 78 +++++++++++++++++++ > 1 file changed, 78 insertions(+) > create mode 100644 Documentation/devicetree/bindings/rtc/nxp,s32g-rtc.yaml > > diff --git a/Documentation/devicetree/bindings/rtc/nxp,s32g-rtc.yaml b/Documentation/devicetree/bindings/rtc/nxp,s32g-rtc.yaml > new file mode 100644 > index 000000000000..231811579e1b > --- /dev/null > +++ b/Documentation/devicetree/bindings/rtc/nxp,s32g-rtc.yaml > @@ -0,0 +1,78 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/rtc/nxp,s32g-rtc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: NXP S32G2/S32G3 Real Time Clock (RTC) > + > +maintainers: > + - Bogdan Hamciuc <bogdan.hamciuc@xxxxxxx> > + - Ciprian Marian Costea <ciprianmarian.costea@xxxxxxx> > + > +description: > + RTC hardware module present on S32G2/S32G3 SoCs is used as a wakeup > + source. It is not kept alive during system reset and it is not > + battery-powered. > + > + RTC hardware module contains a hardware mux with 4 entries/inputs > + for clock source selection. On S32G2/S32G3 SoCs, this mux is used > + to select between a clock source for runtime which brings more > + precision but is not available during system standby, and a clock > + source for suspend state. > + > +properties: > + compatible: > + oneOf: > + - enum: > + - nxp,s32g2-rtc > + - items: > + - const: nxp,s32g3-rtc > + - const: nxp,s32g2-rtc > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + clocks: > + minItems: 2 > + items: > + - description: ipg clock drives the access to the > + RTC iomapped registers > + - description: Runtime clock source. It must be a clock > + source for the RTC module. It will be disabled by hardware > + during Standby/Suspend. > + - description: Standby/Suspend clock source. It is optional > + and can be used in case the RTC will continue ticking during > + platform/system suspend. wrap at 80, keep wrap pos consisent in this file. > + > + clock-names: > + minItems: 2 > + maxItems: 3 > + > +required: > + - compatible > + - reg > + - interrupts > + - clocks > + - clock-names > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/interrupt-controller/irq.h> > + > + rtc@40060000 { > + compatible = "nxp,s32g3-rtc", > + "nxp,s32g2-rtc"; align to previous line " > + reg = <0x40060000 0x1000>; > + interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&clks 54>, <&clks 56>, <&clks 55>; > + clock-names = "ipg", > + "rtc_runtime_s2", > + "rtc_standby_s0"; align to previous line " > + }; > -- > 2.45.2 >
