The ColdFire 520x family of SoCs (including 5207 and 5208) have a Chip
Identification Register (CIR) that can be used to determine the exact
SoC family member. Read this at startup to report the exact SoC type
and its revision number.
Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
---
arch/m68k/coldfire/m520x.c | 21 +++++++++++++++++++++
arch/m68k/include/asm/m520xsim.h | 10 ++++++++++
2 files changed, 31 insertions(+)
diff --git a/arch/m68k/coldfire/m520x.c b/arch/m68k/coldfire/m520x.c
index d2f96b40aee1..30b85c7fb460 100644
--- a/arch/m68k/coldfire/m520x.c
+++ b/arch/m68k/coldfire/m520x.c
@@ -22,6 +22,7 @@
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfclk.h>
+#include <asm/setup.h>
/***************************************************************************/
@@ -185,9 +186,29 @@ static void __init m520x_fec_init(void)
/***************************************************************************/
+static void __init m520x_probe_cpu(void)
+{
+ u16 v;
+
+ v = readw(MCF_CIR);
+
+ switch (MCFCIR_PIN(v)) {
+ case MCFCIR_5208:
+ m68k_cpuname = "5208";
+ break;
+ case MCFCIR_5207:
+ m68k_cpuname = "5207";
+ break;
+ }
+
+ m68k_cpurevision = MCFCIR_PRN(v);
+}
+
void __init config_BSP(char *commandp, int size)
{
mach_sched_init = hw_timer_init;
+
+ m520x_probe_cpu();
m520x_clk_init();
m520x_uarts_init();
m520x_fec_init();
diff --git a/arch/m68k/include/asm/m520xsim.h b/arch/m68k/include/asm/m520xsim.h
index af2c708a528c..dada224bf26e 100644
--- a/arch/m68k/include/asm/m520xsim.h
+++ b/arch/m68k/include/asm/m520xsim.h
@@ -209,5 +209,15 @@
#define MCFI2C_BASE0 0xFC058000
#define MCFI2C_SIZE0 0x40
+/*
+ * Chip Identification.
+ */
+#define MCF_CIR 0xFC0A000A
+#define MCFCIR_PRN(x) ((x) & 0x3f) /* Chip revision */
+#define MCFCIR_PIN(x) (((x) >> 6) & 0x3ff) /* Chip ID */
+
+#define MCFCIR_5207 0x45
+#define MCFCIR_5208 0x44
+
/****************************************************************************/
#endif /* m520xsim_h */
--
2.25.1
