- cause = readl(&src_regs->srsr);
- writel(cause, &src_regs->srsr);
- reset_cause = cause;
+ if (reset_cause == -1) {
+ reset_cause = readl(&src_regs->srsr);
+/* preserve the value for U-Boot proper */
+#if !defined(CONFIG_SPL_BUILD)
+ writel(reset_cause, &src_regs->srsr);
+#endif
+ }
+
+ return reset_cause;
+}