From: Chen-Yu Tsai <wens@xxxxxxxx>
The A83T does not have a 32.768 kHz low speed oscillator, either as
an external crystal or input. It has a 16 MHz RC-based (inaccurate)
internal oscillator, which is then divided by 512 for a clock close
to 32 kHz.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
arch/arm/boot/dts/sun8i-a83t.dtsi | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index 8d27b63..45b725c 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -118,6 +118,7 @@
#size-cells = <1>;
ranges;
+ /* TODO: PRCM block has a mux for this. */
osc24M: osc24M_clk {
#clock-cells = <0>;
compatible = "fixed-clock";
@@ -125,11 +126,25 @@
clock-output-names = "osc24M";
};
- osc32k: osc32k_clk {
+ /*
+ * This is called "internal OSC" in some places.
+ * It is an internal RC-based oscillator.
+ * TODO: Its controls are in the PRCM block.
+ */
+ osc16M: osc16M_clk {
#clock-cells = <0>;
compatible = "fixed-clock";
- clock-frequency = <32768>;
- clock-output-names = "osc32k";
+ clock-frequency = <16000000>;
+ clock-output-names = "osc16M";
+ };
+
+ osc16Md512: osc16Md512_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-factor-clock";
+ clock-div = <512>;
+ clock-mult = <1>;
+ clocks = <&osc16M>;
+ clock-output-names = "osc16Md512";
};
};
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
