OMAP4/5: device: Add support to get the device type.

Add support to identify the device as GP/EMU/HS.

Signed-off-by: R Sricharan <r.sricharan@ti.com>

arch/arm/cpu/armv7/omap-common/hwinit-common.c

@@ -217,7 +217,11 @@ int arch_cpu_init(void)
  */
 u32 get_device_type(void)
 {
-	return 0;
+	struct omap_sys_ctrl_regs *ctrl =
+		      (struct omap_sys_ctrl_regs *) SYSCTRL_GENERAL_CORE_BASE;
+
+	return (readl(&ctrl->control_status) &
+				      (DEVICE_TYPE_MASK)) >> DEVICE_TYPE_SHIFT;
 }
 
 /*

arch/arm/include/asm/arch-omap4/omap.h

@@ -139,6 +139,10 @@ struct s32ktimer {
 	unsigned int s32k_cr;	/* 0x10 */
 };
 
+#define DEVICE_TYPE_SHIFT (0x8)
+#define DEVICE_TYPE_MASK (0x7 << DEVICE_TYPE_SHIFT)
+#define DEVICE_GP 0x3
+
 struct omap_sys_ctrl_regs {
 	unsigned int pad1[129];
 	unsigned int control_id_code;			/* 0x4A002204 */

arch/arm/include/asm/arch-omap5/omap.h

@@ -136,6 +136,10 @@ struct s32ktimer {
 	unsigned int s32k_cr;	/* 0x10 */
 };
 
+#define DEVICE_TYPE_SHIFT 0x6
+#define DEVICE_TYPE_MASK (0x7 << DEVICE_TYPE_SHIFT)
+#define DEVICE_GP 0x3
+
 struct omap_sys_ctrl_regs {
 	u32 pad0[77]; /* 0x4A002000 */
 	u32 control_status; /* 0x4A002134 */