Merge "feat(lib): add mmio read with timeout" into integration
diff --git a/include/lib/mmio_poll.h b/include/lib/mmio_poll.h
new file mode 100644
index 0000000..1b2aa0a
--- /dev/null
+++ b/include/lib/mmio_poll.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef MMIO_POLL_H
+#define MMIO_POLL_H
+
+#include <errno.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+
+/**
+ * mmio_read_poll_timeout - Continuously check an address until a specific
+ * condition is satisfied or a timeout is reached.
+ * @op: The mmio_read_* operator to read the register
+ * @val: The variable where the read value is stored.
+ * @cond: The condition used to stop polling, which can be a macro using @val.
+ * @timeout_us: Timeout in microseconds.
+ * @args: Arguments to be passed to @op.
+ *
+ * Return: 0 if the condition @cond is evaluated to true within @timeout_us
+ * microseconds, or -ETIMEOUT in case of a timeout. In either case,
+ * the last read value will be stored in @val.
+ */
+#define mmio_read_poll_timeout(op, val, cond, timeout_us, args...)\
+({\
+ int _rv = -ETIMEDOUT; \
+ uint32_t _tout_us = (timeout_us); \
+ uint64_t _tout = timeout_init_us(_tout_us);\
+ do {\
+ (val) = (op)(args);\
+ if (cond) { \
+ _rv = 0;\
+ break;\
+ } \
+ } while (!timeout_elapsed(_tout));\
+ _rv;\
+})
+
+#define mmio_read_32_poll_timeout(addr, val, cond, timeout_us) \
+ mmio_read_poll_timeout(&mmio_read_32, val, cond, timeout_us, addr)
+
+#endif /* MMIO_POLL_H */