linux-kernel - [PATCH v1 5/5] ARM: dts: imx6qp: support improved enet clocking on QuadPlus

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Date:   Sun, 12 Jul 2020 20:25:12 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org
Subject: [PATCH v1 5/5] ARM: dts: imx6qp: support improved enet clocking on QuadPlus

Board designers are now able to choose between all three supported
enet clocking methods, by changing the clocktree via the devicetree:

a) route enet_ref externally from pad to pad (the default):

no clock tree changes required

b) route internally on SoC from enet_ref

&fec {
    assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
                      <&clks IMX6QDL_CLK_ENET_REF>;
    assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_REF>;
    assigned-clock-rates = <0>, <125000000>;
};

c) route external clock (from PHY or oscillator) via pad

/ {
    clocks {
        phy_osc: anaclk3 {
            compatible = "fixed-clock";
            #clock-cells = <0>;
            clock-frequency = <125000000>;
       };
   };
};

&fec {
    assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
                      <&clks IMX6QDL_CLK_ENET_PAD>;
    assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_PAD>,
                             <&clks IMX6QDL_CLK_ANACLK3>;
};

Signed-off-by: Sven Van Asbroeck <TheSven73@...il.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@...nel.org>
To: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>
Cc: Fabio Estevam <festevam@...il.com>
Cc: NXP Linux Team <linux-imx@....com>
Cc: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-clk@...r.kernel.org

 arch/arm/boot/dts/imx6qp.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qp.dtsi b/arch/arm/boot/dts/imx6qp.dtsi
index b310f13a53f2..7f81d35f56c9 100644
--- a/arch/arm/boot/dts/imx6qp.dtsi
+++ b/arch/arm/boot/dts/imx6qp.dtsi
@@ -79,6 +79,9 @@
 &fec {
 	interrupts = <0 118 IRQ_TYPE_LEVEL_HIGH>,
 		     <0 119 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&clks IMX6QDL_CLK_ENET>,
+		 <&clks IMX6QDL_CLK_ENET>,
+		 <&clks IMX6QDL_CLK_ENET_PTP>;
 };
 
 &gpc {
-- 
2.17.1