mx6: soc: update get_cpu_rev and get_imx_type for mx6solo/sololite

Previously, the same value was returned for both mx6dl and mx6solo.
Check number of processors to differeniate.
Also, a freescale patch says that sololite has its cpu/rev
stored at 0x280 instead of 0x260.
I don't have a sololite to verify.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

arch/arm/cpu/armv7/mx6/soc.c

@@ -31,17 +31,33 @@
 #include <asm/arch/sys_proto.h>
 #include <asm/imx-common/boot_mode.h>
 
+struct scu_regs {
+	u32	ctrl;
+	u32	config;
+	u32	status;
+	u32	invalidate;
+	u32	fpga_rev;
+};
+
 u32 get_cpu_rev(void)
 {
 	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
-	int reg = readl(&anatop->digprog);
-
-	/* Read mx6 variant: quad, dual or solo */
-	int system_rev = (reg >> 4) & 0xFF000;
-	/* Read mx6 silicon revision */
-	system_rev |= (reg & 0xFF) + 0x10;
-
-	return system_rev;
+	u32 reg = readl(&anatop->digprog_sololite);
+	u32 type = ((reg >> 16) & 0xff);
+
+	if (type != MXC_CPU_MX6SL) {
+		reg = readl(&anatop->digprog);
+		type = ((reg >> 16) & 0xff);
+		if (type == MXC_CPU_MX6DL) {
+			struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
+			u32 cfg = readl(&scu->config) & 3;
+
+			if (!cfg)
+				type = MXC_CPU_MX6SOLO;
+		}
+	}
+	reg &= 0xff;		/* mx6 silicon revision */
+	return (type << 12) | (reg + 0x10);
 }
 
 void init_aips(void)

arch/arm/imx-common/cpu.c

@@ -67,18 +67,20 @@ char *get_reset_cause(void)
 
 #if defined(CONFIG_DISPLAY_CPUINFO)
 
-static const char *get_imx_type(u32 imxtype)
+const char *get_imx_type(u32 imxtype)
 {
 	switch (imxtype) {
-	case 0x63:
+	case MXC_CPU_MX6Q:
 		return "6Q";	/* Quad-core version of the mx6 */
-	case 0x61:
-		return "6DS";	/* Dual/Solo version of the mx6 */
-	case 0x60:
+	case MXC_CPU_MX6DL:
+		return "6DL";	/* Dual Lite version of the mx6 */
+	case MXC_CPU_MX6SOLO:
+		return "6SOLO";	/* Solo version of the mx6 */
+	case MXC_CPU_MX6SL:
 		return "6SL";	/* Solo-Lite version of the mx6 */
-	case 0x51:
+	case MXC_CPU_MX51:
 		return "51";
-	case 0x53:
+	case MXC_CPU_MX53:
 		return "53";
 	default:
 		return "??";

arch/arm/include/asm/arch-mx5/sys_proto.h

@@ -24,8 +24,15 @@
 #ifndef _SYS_PROTO_H_
 #define _SYS_PROTO_H_
 
-u32 get_cpu_rev(void);
+#define MXC_CPU_MX51		0x51
+#define MXC_CPU_MX53		0x53
+#define MXC_CPU_MX6SL		0x60
+#define MXC_CPU_MX6DL		0x61
+#define MXC_CPU_MX6SOLO		0x62
+#define MXC_CPU_MX6Q		0x63
+
 #define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
+u32 get_cpu_rev(void);
 void sdelay(unsigned long);
 void set_chipselect_size(int const);
 

arch/arm/include/asm/arch-mx6/imx-regs.h

@@ -564,6 +564,8 @@ struct anatop_regs {
 	u32	usb2_misc_clr;		/* 0x258 */
 	u32	usb2_misc_tog;		/* 0x25c */
 	u32	digprog;		/* 0x260 */
+	u32	reserved1[7];
+	u32	digprog_sololite;	/* 0x280 */
 };
 
 #define ANATOP_PFD_480_PFD0_FRAC_SHIFT		0

arch/arm/include/asm/arch-mx6/sys_proto.h

@@ -24,9 +24,16 @@
 #ifndef _SYS_PROTO_H_
 #define _SYS_PROTO_H_
 
-#define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
+#define MXC_CPU_MX51		0x51
+#define MXC_CPU_MX53		0x53
+#define MXC_CPU_MX6SL		0x60
+#define MXC_CPU_MX6DL		0x61
+#define MXC_CPU_MX6SOLO		0x62
+#define MXC_CPU_MX6Q		0x63
 
+#define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
 u32 get_cpu_rev(void);
+const char *get_imx_type(u32 imxtype);
 
 void set_vddsoc(u32 mv);