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Message-Id: <20190119144332.11984-2-martin.blumenstingl@googlemail.com>
Date: Sat, 19 Jan 2019 15:43:31 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: linux-amlogic@...ts.infradead.org, linux-rtc@...r.kernel.org,
alexandre.belloni@...tlin.com, a.zummo@...ertech.it
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
ben.dooks@...ethink.co.uk, ccaione@...libre.com,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v6 1/2] dt-bindings: rtc: add device-tree bindings for the Amlogic Meson RTC
The 32-bit Amlogic Meson SoCs (Meson6, Meson8, Meson8b and Meson8m2)
have a built-in RTC block.
It has the following inputs:
- an 32.768kHz crystal oscillator
- an interrupt line
- a reset line
- 0.9V voltage input
Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
[resurrected patches from Ben after 2 years]
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
.../devicetree/bindings/rtc/rtc-meson.txt | 32 +++++++++++++++++++
1 file changed, 32 insertions(+)
create mode 100644 Documentation/devicetree/bindings/rtc/rtc-meson.txt
diff --git a/Documentation/devicetree/bindings/rtc/rtc-meson.txt b/Documentation/devicetree/bindings/rtc/rtc-meson.txt
new file mode 100644
index 000000000000..23df3cf2dd73
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-meson.txt
@@ -0,0 +1,32 @@
+* Amlogic Meson6, Meson8, Meson8b and Meson8m2 RTC
+
+Required properties:
+- compatible: should be one of the following describing the hardware:
+ * "amlogic,meson6-rtc"
+ * "amlogic,meson8-rtc"
+ * "amlogic,meson8b-rtc"
+ * "amlogic,meson8m2-rtc"
+
+- reg: physical register space for the controller's memory mapped registers.
+- interrupts: the interrupt line of the RTC block.
+- clocks: reference to the external 32.768kHz crystal oscillator.
+- vdd-supply: reference to the power supply of the RTC block.
+- resets: reset controller reference to allow reset of the controller
+
+Optional properties:
+- #address-cells: should be 1 to address the internal non-volatile memory
+- #address-cells: should be 1 to reference the internal non-volatile memory
+
+Optional child nodes:
+- see ../nvmem/nvmem.txt
+
+Example:
+
+ rtc: rtc@740 {
+ compatible = "amlogic,meson6-rtc";
+ reg = <0x740 0x14>;
+ interrupts = <GIC_SPI 72 IRQ_TYPE_EDGE_RISING>;
+ clocks = <&rtc32k_xtal>;
+ vdd-supply = <&rtc_vdd>;
+ resets = <&reset RESET_RTC>;
+ };
--
2.20.1
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