[PATCH] ARM: Add SMSC911X support to Overo platform (V2)

[Steve Sakoman <sakoman@gmail.com>]

Gumstix will soon be shipping a variant of their Summit board that
includes an SMSC LAN9221 ethernet interface.  This patch provides
support via the smsc911x driver when enabled in kernel config.

The Overo defconfig is not updated since the LAN9221 is an option
not present on all systems.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
---
 arch/arm/mach-omap2/board-overo.c             |   62 +++++++++++++++++++++++++
 arch/arm/plat-omap/include/mach/board-overo.h |    3 +
 2 files changed, 65 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-overo.c
b/arch/arm/mach-omap2/board-overo.c
index 9995ac2..032a2c9 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -55,6 +55,67 @@
 #define GPMC_CS0_BASE  0x60
 #define GPMC_CS_SIZE   0x30

+#if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)
+
+#include <linux/smsc911x.h>
+
+static struct resource overo_smsc911x_resources[] = {
+	{
+		.name	= "smsc911x-memory",
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
+	},
+};
+
+static struct smsc911x_platform_config overo_smsc911x_config = {
+	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
+	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
+	.flags		= SMSC911X_USE_32BIT ,
+	.phy_interface	= PHY_INTERFACE_MODE_MII,
+};
+
+static struct platform_device overo_smsc911x_device = {
+	.name		= "smsc911x",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(overo_smsc911x_resources),
+	.resource	= &overo_smsc911x_resources,
+	.dev		= {
+		.platform_data = &overo_smsc911x_config,
+	},
+};
+
+static inline void __init overo_init_smsc911x(void)
+{
+	unsigned long cs_mem_base;
+
+	if (gpmc_cs_request(OVERO_SMSC911X_CS, SZ_16M, &cs_mem_base) < 0) {
+		printk(KERN_ERR "Failed request for GPMC mem for smsc911x\n");
+		return;
+	}
+
+	overo_smsc911x_resources[0].start = cs_mem_base + 0x0;
+	overo_smsc911x_resources[0].end   = cs_mem_base + 0xff;
+
+	if ((gpio_request(OVERO_SMSC911X_GPIO, "SMSC911X IRQ") == 0) &&
+	    (gpio_direction_input(OVERO_SMSC911X_GPIO) == 0)) {
+		gpio_export(OVERO_SMSC911X_GPIO, 0);
+	} else {
+		printk(KERN_ERR "could not obtain gpio for SMSC911X IRQ\n");
+		return;
+	}
+
+	overo_smsc911x_resources[1].start = OMAP_GPIO_IRQ(OVERO_SMSC911X_GPIO);
+	overo_smsc911x_resources[1].end	  = 0;
+
+	platform_device_register(&overo_smsc911x_device);
+}
+
+#else
+static inline void __init overo_init_smsc911x(void) { return; }
+#endif
+
 static struct mtd_partition overo_nand_partitions[] = {
 	{
 		.name           = "xloader",
@@ -234,6 +295,7 @@ static void __init overo_init(void)
 	usb_musb_init();
 	usb_ehci_init();
 	overo_flash_init();
+	overo_init_smsc911x();

 	if ((gpio_request(OVERO_GPIO_W2W_NRESET,
 			  "OVERO_GPIO_W2W_NRESET") == 0) &&
diff --git a/arch/arm/plat-omap/include/mach/board-overo.h
b/arch/arm/plat-omap/include/mach/board-overo.h
index 7ecae66..8635171 100644
--- a/arch/arm/plat-omap/include/mach/board-overo.h
+++ b/arch/arm/plat-omap/include/mach/board-overo.h
@@ -22,5 +22,8 @@
 #define OVERO_GPIO_USBH_CPEN	168
 #define OVERO_GPIO_USBH_NRESET	183

+#define OVERO_SMSC911X_CS	5
+#define OVERO_SMSC911X_GPIO	176
+
 #endif /* ____ASM_ARCH_OVERO_H */

-- 
1.5.6.3