ARM: dts: sun7i: Add GMAC clock node to sun7i DTSI

The GMAC uses 1 of 2 sources for its transmit clock, depending on the
PHY interface mode. Add both sources as dummy clocks, and as parents
to the GMAC clock node.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index 4fbe530ec4c3313cf4d599ce92b80dd4d805d9bd..dd567eac3dee99982b7b65cc43feeb3fca0aecc0 100644 (file)
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -321,6 +321,34 @@
                        clock-output-names = "mbus";
                };
 
+               /*
+                * The following two are dummy clocks, placeholders used in the gmac_tx
+                * clock. The gmac driver will choose one parent depending on the PHY
+                * interface mode, using clk_set_rate auto-reparenting.
+                * The actual TX clock rate is not controlled by the gmac_tx clock.
+                */
+               mii_phy_tx_clk: clk@2 {
+                       #clock-cells = <0>;
+                       compatible = "fixed-clock";
+                       clock-frequency = <25000000>;
+                       clock-output-names = "mii_phy_tx";
+               };
+
+               gmac_int_tx_clk: clk@3 {
+                       #clock-cells = <0>;
+                       compatible = "fixed-clock";
+                       clock-frequency = <125000000>;
+                       clock-output-names = "gmac_int_tx";
+               };
+
+               gmac_tx_clk: clk@01c20164 {
+                       #clock-cells = <0>;
+                       compatible = "allwinner,sun7i-a20-gmac-clk";
+                       reg = <0x01c20164 0x4>;
+                       clocks = <&mii_phy_tx_clk>, <&gmac_int_tx_clk>;
+                       clock-output-names = "gmac_tx";
+               };
+
                /*
                 * Dummy clock used by output clocks
                 */