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-rw-r--r--arch/arm/mach-zynq/slcr.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c
index a37d49a6e657..c43a2d16e223 100644
--- a/arch/arm/mach-zynq/slcr.c
+++ b/arch/arm/mach-zynq/slcr.c
@@ -26,10 +26,13 @@
#define SLCR_PS_RST_CTRL_OFFSET 0x200 /* PS Software Reset Control */
#define SLCR_A9_CPU_RST_CTRL_OFFSET 0x244 /* CPU Software Reset Control */
#define SLCR_REBOOT_STATUS_OFFSET 0x258 /* PS Reboot Status */
+#define SLCR_PSS_IDCODE 0x530 /* PS IDCODE */
#define SLCR_UNLOCK_MAGIC 0xDF0D
#define SLCR_A9_CPU_CLKSTOP 0x10
#define SLCR_A9_CPU_RST 0x1
+#define SLCR_PSS_IDCODE_DEVICE_SHIFT 12
+#define SLCR_PSS_IDCODE_DEVICE_MASK 0x1F
static void __iomem *zynq_slcr_base;
static struct regmap *zynq_slcr_regmap;
@@ -83,6 +86,22 @@ static inline int zynq_slcr_unlock(void)
}
/**
+ * zynq_slcr_get_device_id - Read device code id
+ *
+ * Return: Device code id
+ */
+u32 zynq_slcr_get_device_id(void)
+{
+ u32 val;
+
+ zynq_slcr_read(&val, SLCR_PSS_IDCODE);
+ val >>= SLCR_PSS_IDCODE_DEVICE_SHIFT;
+ val &= SLCR_PSS_IDCODE_DEVICE_MASK;
+
+ return val;
+}
+
+/**
* zynq_slcr_system_reset - Reset the entire system.
*/
void zynq_slcr_system_reset(void)
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