OMAP4: Ethernet: KS8851 Board Support

Enable Micrel KS8851 SPI network chip for OMAP4430

Signed-off-by: Abraham Arce <x0066660@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index b88f28c5814b..be7a7868d210 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -18,6 +18,7 @@
 #include <linux/io.h>
 #include <linux/gpio.h>
 #include <linux/usb/otg.h>
+#include <linux/spi/spi.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -32,6 +33,75 @@
 #include <asm/hardware/gic.h>
 #include <asm/hardware/cache-l2x0.h>
 
+#define ETH_KS8851_IRQ                  34
+#define ETH_KS8851_POWER_ON             48
+#define ETH_KS8851_QUART                138
+
+static struct spi_board_info sdp4430_spi_board_info[] __initdata = {
+        {
+                .modalias               = "ks8851",
+                .bus_num                = 1,
+                .chip_select            = 0,
+                .max_speed_hz           = 24000000,
+                .irq                    = ETH_KS8851_IRQ,
+        },
+};
+
+static int omap_ethernet_init(void)
+{
+        int status;
+
+        /* Request of GPIO lines */
+
+        status = gpio_request(ETH_KS8851_POWER_ON, "eth_power");
+        if (status) {
+                pr_err("Cannot request GPIO %d\n", ETH_KS8851_POWER_ON);
+                return status;
+        }
+
+        status = gpio_request(ETH_KS8851_QUART, "quart");
+        if (status) {
+                pr_err("Cannot request GPIO %d\n", ETH_KS8851_QUART);
+                goto error1;
+        }
+
+        status = gpio_request(ETH_KS8851_IRQ, "eth_irq");
+        if (status) {
+                pr_err("Cannot request GPIO %d\n", ETH_KS8851_IRQ);
+                goto error2;
+        }
+
+        /* Configuration of requested GPIO lines */
+
+        status = gpio_direction_output(ETH_KS8851_POWER_ON, 1);
+        if (status) {
+                pr_err("Cannot set output GPIO %d\n", ETH_KS8851_IRQ);
+                goto error3;
+        }
+
+        status = gpio_direction_output(ETH_KS8851_QUART, 1);
+        if (status) {
+                pr_err("Cannot set output GPIO %d\n", ETH_KS8851_QUART);
+                goto error3;
+        }
+
+        status = gpio_direction_input(ETH_KS8851_IRQ);
+        if (status) {
+                pr_err("Cannot set input GPIO %d\n", ETH_KS8851_IRQ);
+                goto error3;
+        }
+
+        return 0;
+
+error3:
+        gpio_free(ETH_KS8851_IRQ);
+error2:
+        gpio_free(ETH_KS8851_QUART);
+error1:
+        gpio_free(ETH_KS8851_POWER_ON);
+        return status;
+}
+
 static struct platform_device sdp4430_lcd_device = {
         .name           = "sdp4430_lcd",
         .id             = -1,
@@ -113,6 +183,8 @@ static struct omap_musb_board_data musb_board_data = {
 
 static void __init omap_4430sdp_init(void)
 {
+        int status;
+
         platform_add_devices(sdp4430_devices, ARRAY_SIZE(sdp4430_devices));
         omap_serial_init();
         /* OMAP4 SDP uses internal transceiver so register nop transceiver */
@@ -120,6 +192,15 @@ static void __init omap_4430sdp_init(void)
         /* FIXME: allow multi-omap to boot until musb is updated for omap4 */
         if (!cpu_is_omap44xx())
                 usb_musb_init(&musb_board_data);
+
+        status = omap_ethernet_init();
+        if (status) {
+                pr_err("Ethernet initialization failed: %d\n", status);
+        } else {
+                sdp4430_spi_board_info[0].irq = gpio_to_irq(ETH_KS8851_IRQ);
+                spi_register_board_info(sdp4430_spi_board_info,
+                                ARRAY_SIZE(sdp4430_spi_board_info));
+        }
 }
 
 static void __init omap_4430sdp_map_io(void)