MIPS: SEAD3: Probe ethernet controller using DT

Probe the smsc911x ethernet controller using device tree rather than
platform code, reducing the amount of the latter.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14050/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/dts/mti/sead3.dts

@@ -87,4 +87,16 @@ uart1: uart@1f000800 {
 
 		no-loopback-test;
 	};
+
+	eth@1f010000 {
+		compatible = "smsc,lan9115";
+		reg = <0x1f010000 0x10000>;
+		reg-io-width = <4>;
+
+		interrupts = <0>; /* GIC 0 or CPU 6 */
+
+		phy-mode = "mii";
+		smsc,irq-push-pull;
+		smsc,save-mac-address;
+	};
 };

arch/mips/include/asm/mips-boards/sead3int.h

@@ -14,10 +14,8 @@
 
 /* CPU interrupt offsets */
 #define CPU_INT_EHCI		2
-#define CPU_INT_NET		6
 
 /* GIC interrupt offsets */
-#define GIC_INT_NET		GIC_SHARED_TO_HWIRQ(0)
 #define GIC_INT_EHCI		GIC_SHARED_TO_HWIRQ(5)
 
 #endif /* !(_MIPS_SEAD3INT_H) */

arch/mips/mti-sead3/sead3-dtshim.c

@@ -25,7 +25,8 @@ static unsigned char fdt_buf[16 << 10] __initdata;
 static int remove_gic(void *fdt)
 {
 	const unsigned int cpu_uart_int = 4;
-	int gic_off, cpu_off, uart_off, err;
+	const unsigned int cpu_eth_int = 6;
+	int gic_off, cpu_off, uart_off, eth_off, err;
 	uint32_t cfg, cpu_phandle;
 
 	/* leave the GIC node intact if a GIC is present */
@@ -82,6 +83,18 @@ static int remove_gic(void *fdt)
 		return uart_off;
 	}
 
+	eth_off = fdt_node_offset_by_compatible(fdt, -1, "smsc,lan9115");
+	if (eth_off < 0) {
+		pr_err("unable to find ethernet DT node: %d\n", eth_off);
+		return eth_off;
+	}
+
+	err = fdt_setprop_u32(fdt, eth_off, "interrupts", cpu_eth_int);
+	if (err) {
+		pr_err("unable to set ethernet interrupts property: %d\n", err);
+		return err;
+	}
+
 	return 0;
 }
 

arch/mips/mti-sead3/sead3-platform.c

@@ -14,37 +14,9 @@
 #include <linux/mtd/physmap.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
-#include <linux/smsc911x.h>
 
 #include <asm/mips-boards/sead3int.h>
 
-static struct smsc911x_platform_config sead3_smsc911x_data = {
-	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
-	.irq_type	= SMSC911X_IRQ_TYPE_PUSH_PULL,
-	.flags		= SMSC911X_USE_32BIT | SMSC911X_SAVE_MAC_ADDRESS,
-	.phy_interface	= PHY_INTERFACE_MODE_MII,
-};
-
-static struct resource sead3_net_resources[] = {
-	{
-		.start			= 0x1f010000,
-		.end			= 0x1f01ffff,
-		.flags			= IORESOURCE_MEM
-	}, {
-		.flags			= IORESOURCE_IRQ
-	}
-};
-
-static struct platform_device sead3_net_device = {
-	.name			= "smsc911x",
-	.id			= 0,
-	.dev			= {
-		.platform_data	= &sead3_smsc911x_data,
-	},
-	.num_resources		= ARRAY_SIZE(sead3_net_resources),
-	.resource		= sead3_net_resources
-};
-
 static struct mtd_partition sead3_mtd_partitions[] = {
 	{
 		.name =		"User FS",
@@ -175,7 +147,6 @@ static struct platform_device *sead3_platform_devices[] __initdata = {
 	&fled_device,
 	&sead3_led_device,
 	&ehci_device,
-	&sead3_net_device,
 };
 
 static int __init sead3_platforms_device_init(void)
@@ -204,13 +175,9 @@ static int __init sead3_platforms_device_init(void)
 	if (gic_present) {
 		ehci_resources[1].start =
 			irq_create_mapping(irqd, GIC_INT_EHCI);
-		sead3_net_resources[1].start =
-			irq_create_mapping(irqd, GIC_INT_NET);
 	} else {
 		ehci_resources[1].start =
 			irq_create_mapping(irqd, CPU_INT_EHCI);
-		sead3_net_resources[1].start =
-			irq_create_mapping(irqd, CPU_INT_NET);
 	}
 
 	return platform_add_devices(sead3_platform_devices,