diff mbox series

[v2,1/2] arm64: dts: allwinner: a523: add EPHY 25MHz clock fanout pins

Message ID 20260926232142.5244-2-andre.przywara@arm.com (mailing list archive)
State New
Headers
Series arm64: dts: allwinner: x96qpro+: enable Ethernet support |

Commit Message

Andre Przywara Sept. 26, 2026, 11:21 p.m. UTC 
The Allwinner A523 SoC family provides two clock fanout pins, which are
backed by gated clocks fixed to 25 MHz, divided down from the main
peripheral PLL. Those are meant to clock an Ethernet PHY, and allow to
save an external crystal oscillator typically employed for that purpose.

Add the pin descriptions of the two pins for those clocks, one is within
the RGMII0 pins, the other within the RGMII1 pins, although the clock
fanout works completely independently from the two MACs.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

Jernej Škrabec Sept. 27, 2026, 11:44 a.m. UTC | #1 
Dne nedelja, 27. september 2026 ob 01:21:41 Srednjeevropski poletni čas je Andre Przywara napisal(a):
> The Allwinner A523 SoC family provides two clock fanout pins, which are
> backed by gated clocks fixed to 25 MHz, divided down from the main
> peripheral PLL. Those are meant to clock an Ethernet PHY, and allow to
> save an external crystal oscillator typically employed for that purpose.
> 
> Add the pin descriptions of the two pins for those clocks, one is within
> the RGMII0 pins, the other within the RGMII1 pins, although the clock
> fanout works completely independently from the two MACs.
> 
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>

Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
index 85ef492ffeae7..ce01fad22b469 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
@@ -147,6 +147,20 @@  pio: pinctrl@2000000 {
 			interrupt-controller;
 			#interrupt-cells = <3>;
 
+			/omit-if-no-ref/
+			ephy0_25m_pin: ephy0-25m-pin {
+				pins = "PH13";
+				allwinner,pinmux = <5>;
+				function = "ephy_25m";
+			};
+
+			/omit-if-no-ref/
+			ephy1_25m_pin: ephy1-25m-pin {
+				pins = "PJ10";
+				allwinner,pinmux = <5>;
+				function = "ephy_25m";
+			};
+
 			/omit-if-no-ref/
 			i2s2_pi_pins: i2s2-pi-pins {
 				pins = "PI2", "PI3", "PI4", "PI5";