linux-kernel - [PATCH 1/5] dt-bindings: clock: meson8b: add the clock inputs

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Message-Id: <20190921151223.768842-2-martin.blumenstingl@googlemail.com>
Date:   Sat, 21 Sep 2019 17:12:19 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     narmstrong@...libre.com, jbrunet@...libre.com, robh+dt@...nel.org,
        mark.rutland@....com, linux-amlogic@...ts.infradead.org,
        devicetree@...r.kernel.org, khilman@...libre.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 1/5] dt-bindings: clock: meson8b: add the clock inputs

The clock controller on Meson8/Meson8b/Meson8m2 has three (known)
inputs:
- "xtal": the main 24MHz crystal
- "ddr_pll": some of the audio clocks use the output of the DDR PLL as
  input
- "clk_32k": an optional clock signal which can be connected to GPIOAO_6
  (which then has to be switched to the CLK_32K_IN function)

Add the inputs to the documentation so we can wire up these inputs in a
follow-up patch.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 .../devicetree/bindings/clock/amlogic,meson8b-clkc.txt       | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt
index 4d94091c1d2d..cc51e4746b3b 100644
--- a/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt
+++ b/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt
@@ -11,6 +11,11 @@ Required Properties:
 	- "amlogic,meson8m2-clkc" for Meson8m2 (S812) SoCs
 - #clock-cells: should be 1.
 - #reset-cells: should be 1.
+- clocks: list of clock phandles, one for each entry in clock-names
+- clock-names: should contain the following:
+  * "xtal": the 24MHz system oscillator
+  * "ddr_pll": the DDR PLL clock
+  * "clk_32k": (if present) the 32kHz clock signal from GPIOAO_6 (CLK_32K_IN)
 
 Parent node should have the following properties :
 - compatible: "amlogic,meson-hhi-sysctrl", "simple-mfd", "syscon"
-- 
2.23.0