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ARM: dts: sun9i: Switch to the AC100 RTC clock outputs for osc32k

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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>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Chen-Yu Tsai 2016-08-19 15:42:26 +08:00 committed by Maxime Ripard
parent 38f151d410
commit 162669876b
3 changed files with 15 additions and 6 deletions
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5
arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
View file

@ -103,6 +103,11 @@ &mmc2_8bit_pins {
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";

5
arch/arm/boot/dts/sun9i-a80-optimus.dts
View file

@ -152,6 +152,11 @@ &ohci2 {
status = "okay";
};
&osc32k {
/* osc32k input is from AC100 */
clocks = <&ac100_rtc 0>;
};
&pio {
led_pins_optimus: led-pins@0 {
allwinner,pins = "PH0", "PH1";

11
arch/arm/boot/dts/sun9i-a80.dtsi
View file

@ -148,15 +148,14 @@ osc24M: osc24M_clk {
/*
* 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-div = <1>;
clock-mult = <1>;
clock-output-names = "osc32k";
};