[v2,04/14] dt-bindings: rtc: sun6i-rtc: Export internal RC oscillator
diff mbox series

Message ID 20181203145825.20511-5-wens@csie.org
State New, archived
Headers show
Series
  • rtc: sun6i: clock rework and pre-H6 SoC support
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Commit Message

Chen-Yu Tsai Dec. 3, 2018, 2:58 p.m. UTC
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>
---
 Documentation/devicetree/bindings/rtc/sun6i-rtc.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Maxime Ripard Dec. 4, 2018, 9:17 a.m. UTC | #1
On Mon, Dec 03, 2018 at 10:58:15PM +0800, Chen-Yu Tsai wrote:
> 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>

Maxime

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt b/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
index c7aed31210bc..6b732c41392b 100644
--- a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
@@ -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: