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8c4cf161a8
The register range for the RTC extends beyond 0x54.
Use the size from the user manual's memory map instead.
Fixes: 9765d2d943 ("rtc: sun6i: Add sun6i RTC driver")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
* sun6i Real Time Clock
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RTC controller for the Allwinner A31
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Required properties:
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- compatible : Should be one of the following combinations:
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- "allwinner,sun6i-a31-rtc"
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- "allwinner,sun8i-a23-rtc"
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- "allwinner,sun8i-h3-rtc"
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- "allwinner,sun8i-r40-rtc", "allwinner,sun8i-h3-rtc"
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- "allwinner,sun8i-v3-rtc"
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- "allwinner,sun50i-a64-rtc", "allwinner,sun8i-h3-rtc"
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- "allwinner,sun50i-h5-rtc"
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Where there are two or more compatible strings, this
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denotes the hardware covered by the most specific one
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is backward-compatible with the latter ones, and the
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implementation for the latter ones can be used, albeit
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with reduced functionality.
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- reg : physical base address of the controller and length of
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memory mapped region.
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- interrupts : IRQ lines for the RTC alarm 0 and alarm 1, in that order.
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Required properties for new device trees
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- clocks : phandle to the 32kHz external oscillator
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- clock-output-names : names of up to three clock outputs. See below.
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- #clock-cells : must be equal to 1.
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The RTC provides the following clocks at the given indices:
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- 0: LOSC
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- 1: LOSC external output, known as X32KFOUT in the datasheet.
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This clock is not available on the A31 and is deprecated for old
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device trees still using the "allwinner,sun6i-a31-rtc" compatible.
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- 2: InternalOSC, or internal RC oscillator (A64/H3/H5 only)
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Example:
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rtc: rtc@1f00000 {
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compatible = "allwinner,sun6i-a31-rtc";
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reg = <0x01f00000 0x400>;
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interrupts = <0 40 4>, <0 41 4>;
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clock-output-names = "osc32k";
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clocks = <&ext_osc32k>;
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#clock-cells = <1>;
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};
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