linux-kernel - [PATCH net-next 2/4] net: dsa: mv88e6xxx: account for PHY base address offset in dual chip mode

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Date:   Mon, 30 Mar 2020 15:53:43 +0200
From:   Matthias Schiffer <matthias.schiffer@...tq-group.com>
To:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH net-next 2/4] net: dsa: mv88e6xxx: account for PHY base address offset in dual chip mode

In dual chip mode (6250 family), not only global and port registers are
shifted by sw_addr, but also the PHY addresses. Account for this in the
IRQ mapping.

Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
---
 drivers/net/dsa/mv88e6xxx/chip.h    | 1 +
 drivers/net/dsa/mv88e6xxx/global2.c | 2 +-
 drivers/net/dsa/mv88e6xxx/smi.c     | 4 ++++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index e5430cf2ad71..88c148a62366 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -257,6 +257,7 @@ struct mv88e6xxx_chip {
 	const struct mv88e6xxx_bus_ops *smi_ops;
 	struct mii_bus *bus;
 	int sw_addr;
+	unsigned int phy_base_addr;
 
 	/* Handles automatic disabling and re-enabling of the PHY
 	 * polling unit.
diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c
index 8fd483020c5b..3c3dfaf16882 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.c
+++ b/drivers/net/dsa/mv88e6xxx/global2.c
@@ -1156,7 +1156,7 @@ int mv88e6xxx_g2_irq_mdio_setup(struct mv88e6xxx_chip *chip,
 			err = irq;
 			goto out;
 		}
-		bus->irq[chip->info->phy_base_addr + phy] = irq;
+		bus->irq[chip->phy_base_addr + phy] = irq;
 	}
 	return 0;
 out:
diff --git a/drivers/net/dsa/mv88e6xxx/smi.c b/drivers/net/dsa/mv88e6xxx/smi.c
index 282fe08db050..a62d7b8702d5 100644
--- a/drivers/net/dsa/mv88e6xxx/smi.c
+++ b/drivers/net/dsa/mv88e6xxx/smi.c
@@ -175,5 +175,9 @@ int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
 	chip->bus = bus;
 	chip->sw_addr = sw_addr;
 
+	chip->phy_base_addr = chip->info->phy_base_addr;
+	if (chip->info->dual_chip)
+		chip->phy_base_addr += sw_addr;
+
 	return 0;
 }
-- 
2.17.1