ARM: dove: add si5351 clock driver to CuBox DT

This patch adds the device tree node for si5351 clock generator
and the corresponding oscillator connected to it. It also limits
i2c frequency to 100kHz as there are bus locks reported on higher
frequencies.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

diff --git a/arch/arm/boot/dts/dove-cubox.dts b/arch/arm/boot/dts/dove-cubox.dts
index 7e3065abd7512eaccc203feefd60345ac931e7f0..5cae2ab69762a8298a694b21f1ee71c753a4a60c 100644 (file)
--- a/arch/arm/boot/dts/dove-cubox.dts
+++ b/arch/arm/boot/dts/dove-cubox.dts
@@ -44,11 +44,60 @@
                        gpio = <&gpio0 1 0>;
                };
        };
+
+       clocks {
+               /* 25MHz reference crystal */
+               ref25: oscillator {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <25000000>;
+               };
+       };
 };
 
 &uart0 { status = "okay"; };
 &sata0 { status = "okay"; };
-&i2c0 { status = "okay"; };
+
+&i2c0 {
+       status = "okay";
+       clock-frequency = <100000>;
+
+       si5351: clock-generator {
+               compatible = "silabs,si5351a-msop";
+               reg = <0x60>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+               #clock-cells = <1>;
+
+               /* connect xtal input to 25MHz reference */
+               clocks = <&ref25>;
+
+               /* connect xtal input as source of pll0 and pll1 */
+               silabs,pll-source = <0 0>, <1 0>;
+
+               clkout0 {
+                       reg = <0>;
+                       silabs,drive-strength = <8>;
+                       silabs,multisynth-source = <0>;
+                       silabs,clock-source = <0>;
+                       silabs,pll-master;
+               };
+
+               clkout1 {
+                       reg = <1>;
+                       silabs,drive-strength = <8>;
+                       silabs,multisynth-source = <1>;
+                       silabs,clock-source = <0>;
+                       silabs,pll-master;
+               };
+
+               clkout2 {
+                       reg = <2>;
+                       silabs,multisynth-source = <1>;
+                       silabs,clock-source = <0>;
+               };
+       };
+};
 
 &sdio0 {
        status = "okay";