Signed-off-by: Eric Bénard <eric@xxxxxxxxxx>
---
arch/arm/mach-imx/imx53.c | 45 +++++++++++++++++++++++++++
arch/arm/mach-imx/include/mach/imx53-regs.h | 5 +++
2 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-imx/imx53.c b/arch/arm/mach-imx/imx53.c
index 4f7d1cb..acb9d49 100644
--- a/arch/arm/mach-imx/imx53.c
+++ b/arch/arm/mach-imx/imx53.c
@@ -37,6 +37,51 @@ void *imx_gpio_base[] = {
int imx_gpio_count = ARRAY_SIZE(imx_gpio_base) * 32;
+#define SI_REV 0x48
+
+static u32 mx53_silicon_revision;
+static char *mx53_rev_string = "unknown";
+
+int imx_silicon_revision(void)
+{
+ return mx53_silicon_revision;
+}
+
+static int query_silicon_revision(void)
+{
+ void __iomem *rom = MX53_IROM_BASE_ADDR;
+ u32 rev;
+
+ rev = readl(rom + SI_REV);
+ switch (rev) {
+ case 0x10:
+ mx53_silicon_revision = MX53_CHIP_REV_1_0;
+ mx53_rev_string = "1.0";
+ break;
+ case 0x20:
+ mx53_silicon_revision = MX53_CHIP_REV_2_0;
+ mx53_rev_string = "2.0";
+ break;
+ case 0x21:
+ mx53_silicon_revision = MX53_CHIP_REV_2_1;
+ mx53_rev_string = "2.1";
+ break;
+ default:
+ mx53_silicon_revision = 0;
+ }
+
+ return 0;
+}
+core_initcall(query_silicon_revision);
+
+static int imx53_print_silicon_rev(void)
+{
+ printf("detected i.MX53 rev %s\n", mx53_rev_string);
+
+ return 0;
+}
+device_initcall(imx53_print_silicon_rev);
+
static int imx53_init(void)
{
add_generic_device("imx_iim", 0, NULL, MX53_IIM_BASE_ADDR, SZ_4K,
diff --git a/arch/arm/mach-imx/include/mach/imx53-regs.h b/arch/arm/mach-imx/include/mach/imx53-regs.h
index 8fefc54..065bf08 100644
--- a/arch/arm/mach-imx/include/mach/imx53-regs.h
+++ b/arch/arm/mach-imx/include/mach/imx53-regs.h
@@ -135,5 +135,10 @@
#define MX53_CS2_96MB_BASE_ADDR 0xF6000000
#define MX53_CS3_BASE_ADDR 0xF6000000
+/* silicon revisions specific to i.MX53 */
+#define MX53_CHIP_REV_1_0 0x10
+#define MX53_CHIP_REV_2_0 0x20
+#define MX53_CHIP_REV_2_1 0x21
+
#endif /* __MACH_IMX53_REGS_H */
--
1.7.7.6
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