net: macb: remove #if defined(CONFIG_ARCH_AT91) sections

With multi platform support those sections could lead to unexpected
behavior if both ARCH_AT91 and another ARM SoC using the MACB IP are
selected.
Add two new capabilities to encode the default MII mode and the presence
of a CLKEN bit in USRIO register.
Then define the appropriate config for IPs embedded in at91 SoCs.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 19 insertions, 15 deletions

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index f6c8935a4f0b..ff649f0e9cb7 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -2131,6 +2131,10 @@ static const struct net_device_ops macb_netdev_ops = {
 };
 
 #if defined(CONFIG_OF)
+static struct macb_config at91sam9260_config = {
+        .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII,
+};
+
 static struct macb_config pc302gem_config = {
         .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
         .dma_burst_length = 16,
@@ -2148,7 +2152,7 @@ static struct macb_config sama5d4_config = {
 
 static const struct of_device_id macb_dt_ids[] = {
         { .compatible = "cdns,at32ap7000-macb" },
-        { .compatible = "cdns,at91sam9260-macb" },
+        { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
         { .compatible = "cdns,macb" },
         { .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
         { .compatible = "cdns,gem", .data = &pc302gem_config },
@@ -2408,21 +2412,19 @@ static int macb_probe(struct platform_device *pdev)
                 bp->phy_interface = err;
         }
 
+        config = 0;
         if (bp->phy_interface == PHY_INTERFACE_MODE_RGMII)
-                macb_or_gem_writel(bp, USRIO, GEM_BIT(RGMII));
-        else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII)
-#if defined(CONFIG_ARCH_AT91)
-                macb_or_gem_writel(bp, USRIO, (MACB_BIT(RMII) |
-                                               MACB_BIT(CLKEN)));
-#else
-                macb_or_gem_writel(bp, USRIO, 0);
-#endif
-        else
-#if defined(CONFIG_ARCH_AT91)
-                macb_or_gem_writel(bp, USRIO, MACB_BIT(CLKEN));
-#else
-                macb_or_gem_writel(bp, USRIO, MACB_BIT(MII));
-#endif
+                config = GEM_BIT(RGMII);
+        else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII &&
+                 (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII))
+                config = MACB_BIT(RMII);
+        else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII))
+                config = MACB_BIT(MII);
+
+        if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN)
+                config |= MACB_BIT(CLKEN);
+
+        macb_or_gem_writel(bp, USRIO, config);
 
         err = register_netdev(dev);
         if (err) {
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 83241c8ec5dc..1797fb00124b 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -391,6 +391,8 @@
 
 /* Capability mask bits */
 #define MACB_CAPS_ISR_CLEAR_ON_WRITE            0x00000001
+#define MACB_CAPS_USRIO_HAS_CLKEN               0x00000002
+#define MACB_CAPS_USRIO_DEFAULT_IS_MII          0x00000004
 #define MACB_CAPS_FIFO_MODE                     0x10000000
 #define MACB_CAPS_GIGABIT_MODE_AVAILABLE        0x20000000
 #define MACB_CAPS_SG_DISABLED                   0x40000000