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dt-bindings: rtc: sun6i-rtc: Export internal RC oscillator 

Experiments showed that on at least the H3/H5/A64 the RTC's internal
oscillator also feeds the CPUS mux in the PRCM.

Export this clock through the device tree, instead of having to use
a dummy fixed-clock device node, for the PRCM to consume. This will
properly describe the relationship between the clocks.

Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Chen-Yu Tsai 2018-12-03 22:58:15 +08:00 committed by Alexandre Belloni
parent 5a0923aad7
commit 9cd3558678
1 changed files with 2 additions and 1 deletions
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3
Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
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@ -24,7 +24,7 @@ Required properties:
Required properties for new device trees
- clocks : phandle to the 32kHz external oscillator
- clock-output-names : names of up to two clock outputs. See below.
- clock-output-names : names of up to three clock outputs. See below.
- #clock-cells : must be equal to 1.
The RTC provides the following clocks at the given indices:
@ -32,6 +32,7 @@ The RTC provides the following clocks at the given indices:
- 1: LOSC external output, known as X32KFOUT in the datasheet.
This clock is not available on the A31 and is deprecated for old
device trees still using the "allwinner,sun6i-a31-rtc" compatible.
- 2: InternalOSC, or internal RC oscillator (A64/H3/H5 only)
Example: