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Subject[PATCH v2 10/10] ARM: dts: sun9i: Switch to the AC100 RTC clock outputs for osc32k
Date
The 32.768 kHz clock inside the A80 SoC is fed from an external source,
typically the AC100 RTC module.

Make the osc32k placeholder a fixed-factor clock so board dts files can
specify its source.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 5 +++++
arch/arm/boot/dts/sun9i-a80-optimus.dts | 5 +++++
arch/arm/boot/dts/sun9i-a80.dtsi | 9 +++------
3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
index 65f4f32f89ad..b6299a9c14e3 100644
--- a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
+++ b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
@@ -103,6 +103,11 @@
allwinner,drive = <SUN4I_PINCTRL_40_MA>;
};

+&osc32k {
+ /* osc32k input is from AC100 */
+ clocks = <&ac100_rtc 0>;
+};
+
&pio {
led_pins_cubieboard4: led-pins@0 {
allwinner,pins = "PH6", "PH17";
diff --git a/arch/arm/boot/dts/sun9i-a80-optimus.dts b/arch/arm/boot/dts/sun9i-a80-optimus.dts
index 3b013dc5fef1..2f079cbd2025 100644
--- a/arch/arm/boot/dts/sun9i-a80-optimus.dts
+++ b/arch/arm/boot/dts/sun9i-a80-optimus.dts
@@ -152,6 +152,11 @@
status = "okay";
};

+&osc32k {
+ /* osc32k input is from AC100 */
+ clocks = <&ac100_rtc 0>;
+};
+
&pio {
led_pins_optimus: led-pins@0 {
allwinner,pins = "PH0", "PH1";
diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi
index f68b3242b33a..dd11115ec087 100644
--- a/arch/arm/boot/dts/sun9i-a80.dtsi
+++ b/arch/arm/boot/dts/sun9i-a80.dtsi
@@ -148,15 +148,12 @@

/*
* The 32k clock is from an external source, normally the
- * AC100 codec/RTC chip. This clock is by default enabled
- * and clocked at 32768 Hz, from the oscillator connected
- * to the AC100. It is configurable, but no such driver or
- * bindings exist yet.
+ * AC100 codec/RTC chip. This serves as a placeholder for
+ * board dts files to specify the source.
*/
osc32k: osc32k_clk {
#clock-cells = <0>;
- compatible = "fixed-clock";
- clock-frequency = <32768>;
+ compatible = "fixed-factor-clock";
clock-output-names = "osc32k";
};

--
2.8.1
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