ARM: at91: Get the Chip ID of SAMA5D2 SiP

The SAMA5D2 SiP(System in Package) has different Chip IDs in the
CHIPID and CHIP_EXID registers.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/mach-at91/armv7/sama5d2_devices.c

@@ -10,11 +10,20 @@
 #include <asm/arch/clk.h>
 #include <asm/arch/sama5d2.h>
 
-char *get_cpu_name()
+int cpu_is_sama5d2(void)
 {
+	unsigned int chip_id = get_chip_id();
+
+	return ((chip_id == ARCH_ID_SAMA5D2) ||
+		(chip_id == ARCH_ID_SAMA5D2_SIP)) ? 1 : 0;
+}
+
+char *get_cpu_name(void)
+{
+	unsigned int chip_id = get_chip_id();
 	unsigned int extension_id = get_extension_chip_id();
 
-	if (cpu_is_sama5d2()) {
+	if (chip_id == ARCH_ID_SAMA5D2) {
 		switch (extension_id) {
 		case ARCH_EXID_SAMA5D21CU:
 			return "SAMA5D21";
@@ -41,6 +50,19 @@ char *get_cpu_name()
 		}
 	}
 
+	if ((chip_id == ARCH_ID_SAMA5D2) || (chip_id == ARCH_ID_SAMA5D2_SIP)) {
+		switch (extension_id) {
+		case ARCH_EXID_SAMA5D225C_D1M:
+			return "SAMA5D225 128M bits DDR2 SDRAM";
+		case ARCH_EXID_SAMA5D27C_D5M:
+			return "SAMA5D27 512M bits DDR2 SDRAM";
+		case ARCH_EXID_SAMA5D27C_D1G:
+			return "SAMA5D27 1G bits DDR2 SDRAM";
+		case ARCH_EXID_SAMA5D28C_D1G:
+			return "SAMA5D28 1G bits DDR2 SDRAM";
+		}
+	}
+
 	return "Unknown CPU type";
 }
 

arch/arm/mach-at91/include/mach/sama5d2.h

@@ -222,7 +222,11 @@
 #define ARCH_EXID_SAMA5D28CU	0x00000010
 #define ARCH_EXID_SAMA5D28CN	0x00000020
 
-#define cpu_is_sama5d2()	(get_chip_id() == ARCH_ID_SAMA5D2)
+#define ARCH_ID_SAMA5D2_SIP		0x8a5c08c2
+#define ARCH_EXID_SAMA5D225C_D1M	0x00000053
+#define ARCH_EXID_SAMA5D27C_D5M		0x00000032
+#define ARCH_EXID_SAMA5D27C_D1G		0x00000033
+#define ARCH_EXID_SAMA5D28C_D1G		0x00000013
 
 /* PIT Timer(PIT_PIIR) */
 #define CONFIG_SYS_TIMER_COUNTER	0xf804803c
@@ -233,6 +237,7 @@
 #ifndef __ASSEMBLY__
 unsigned int get_chip_id(void);
 unsigned int get_extension_chip_id(void);
+int cpu_is_sama5d2(void);
 unsigned int has_lcdc(void);
 char *get_cpu_name(void);
 #endif