[v2,2/2] ARM: dts: ls1021a-tsn: Use interrupts for the SGMII PHYs
diff mbox series

Message ID 20191114110254.32171-3-linux@rasmusvillemoes.dk
State New
Headers show
Series
  • ARM: dts: ls1021a: define and use external interrupt lines
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Commit Message

Rasmus Villemoes Nov. 14, 2019, 11:02 a.m. UTC
From: Vladimir Oltean <olteanv@gmail.com>

On the LS1021A-TSN board, the 2 Atheros AR8031 PHYs for eth0 and eth1
have interrupt lines connected to the shared IRQ2_B LS1021A pin.

Switching to interrupts offloads the PHY library from the task of
polling the MDIO status and AN registers (1, 4, 5) every second.

Unfortunately, the BCM5464R quad PHY connected to the switch does not
appear to have an interrupt line routed to the SoC.

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 arch/arm/boot/dts/ls1021a-tsn.dts | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Andrew Lunn Nov. 14, 2019, 3:28 p.m. UTC | #1
On Thu, Nov 14, 2019 at 12:02:53PM +0100, Rasmus Villemoes wrote:
> From: Vladimir Oltean <olteanv@gmail.com>
> 
> On the LS1021A-TSN board, the 2 Atheros AR8031 PHYs for eth0 and eth1
> have interrupt lines connected to the shared IRQ2_B LS1021A pin.
> 
> Switching to interrupts offloads the PHY library from the task of
> polling the MDIO status and AN registers (1, 4, 5) every second.
> 
> Unfortunately, the BCM5464R quad PHY connected to the switch does not
> appear to have an interrupt line routed to the SoC.
> 
> Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Patch
diff mbox series

diff --git a/arch/arm/boot/dts/ls1021a-tsn.dts b/arch/arm/boot/dts/ls1021a-tsn.dts
index 5b7689094b70..9d8f0c2a8aba 100644
--- a/arch/arm/boot/dts/ls1021a-tsn.dts
+++ b/arch/arm/boot/dts/ls1021a-tsn.dts
@@ -203,11 +203,15 @@ 
 	/* AR8031 */
 	sgmii_phy1: ethernet-phy@1 {
 		reg = <0x1>;
+		/* SGMII1_PHY_INT_B: connected to IRQ2, active low */
+		interrupts-extended = <&extirq 2 IRQ_TYPE_LEVEL_LOW>;
 	};
 
 	/* AR8031 */
 	sgmii_phy2: ethernet-phy@2 {
 		reg = <0x2>;
+		/* SGMII2_PHY_INT_B: connected to IRQ2, active low */
+		interrupts-extended = <&extirq 2 IRQ_TYPE_LEVEL_LOW>;
 	};
 
 	/* BCM5464 quad PHY */