Subject: [PATCH] net: dsa: bcm_sf2: enable GPHY for switch probing
From: Rafał Miłecki <[email-masked]>
Date: Mon, 15 Feb 2021 23:59:26 +0100

GPHY needs to be enabled to succesfully probe & setup switch port
connected to it. Otherwise hardcoding PHY OUI would be required.

Before:
brcm-sf2 80080000.switch lan4 (uninitialized): PHY [800c05c0.mdio--1:08] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan3 (uninitialized): PHY [800c05c0.mdio--1:09] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan2 (uninitialized): PHY [800c05c0.mdio--1:0a] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan1 (uninitialized): PHY [800c05c0.mdio--1:0b] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch wan (uninitialized): error -5 setting up PHY for tree 0, switch 0, port 7

After:
brcm-sf2 80080000.switch lan4 (uninitialized): PHY [800c05c0.mdio--1:08] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan3 (uninitialized): PHY [800c05c0.mdio--1:09] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan2 (uninitialized): PHY [800c05c0.mdio--1:0a] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch lan1 (uninitialized): PHY [800c05c0.mdio--1:0b] driver [Generic PHY] (irq=POLL)
brcm-sf2 80080000.switch wan (uninitialized): PHY [800c05c0.mdio--1:0c] driver [Generic PHY] (irq=POLL)

Signed-off-by: Rafał Miłecki <[email-masked]>
---
 drivers/net/dsa/bcm_sf2.c | 4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1234,10 +1234,14 @@ static int bcm_sf2_sw_probe(struct platf
 	rev = reg_readl(priv, REG_PHY_REVISION);
 	priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
 
+	bcm_sf2_gphy_enable_set(priv->dev->ds, true);
+
 	ret = b53_switch_register(dev);
 	if (ret)
 		goto out_mdio;
 
+	bcm_sf2_gphy_enable_set(priv->dev->ds, false);
+
 	dev_info(&pdev->dev,
 		 "Starfighter 2 top: %x.%02x, core: %x.%02x, IRQs: %d, %d\n",
 		 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,