On 11/11/2024 5:14 PM, Frank Li wrote:
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.
Hello Frank,
Thanks for your review.
I will update wrapping to 80 characters in V5.
+
+ 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 "
I will update this alignment in V5.
+ 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 "
I will update this alignment in V5.
Best Regards,
Ciprian
+ };
--
2.45.2
