[PATCH wireless-next 07/35] wifi: mm81x: add debug.c

[Lachlan Hodges <lachlan.hodges@morsemicro.com>]

(Patches split per file for review, see cover letter for more
information)

Signed-off-by: Lachlan Hodges <lachlan.hodges@morsemicro.com>
---
 drivers/net/wireless/morsemicro/mm81x/debug.c | 87 +++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 drivers/net/wireless/morsemicro/mm81x/debug.c

diff --git a/drivers/net/wireless/morsemicro/mm81x/debug.c b/drivers/net/wireless/morsemicro/mm81x/debug.c
new file mode 100644
index 000000000000..6c9720fa452c
--- /dev/null
+++ b/drivers/net/wireless/morsemicro/mm81x/debug.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2017-2026 Morse Micro
+ */
+#include <linux/printk.h>
+#include <linux/ratelimit.h>
+#include <linux/stdarg.h>
+#include "core.h"
+#include "debug.h"
+
+void mm81x_info(struct mm81x *mm, const char *fmt, ...)
+{
+	struct va_format vaf = { .fmt = fmt };
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	dev_info(mm->dev, "%pV\n", &vaf);
+	va_end(args);
+}
+
+void mm81x_err(struct mm81x *mm, const char *fmt, ...)
+{
+	struct va_format vaf = { .fmt = fmt };
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	dev_err(mm->dev, "%pV\n", &vaf);
+	va_end(args);
+}
+
+void __mm81x_warn(struct device *dev, const char *fmt, ...)
+{
+	struct va_format vaf = { .fmt = fmt };
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	dev_warn_ratelimited(dev, "%pV\n", &vaf);
+	va_end(args);
+}
+
+#ifdef CONFIG_MM81X_DEBUG
+void __mm81x_dbg(struct mm81x *mm, enum mm81x_debug_mask mask, const char *fmt,
+		 ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	dev_dbg(mm->dev, "%pV\n", &vaf);
+	va_end(args);
+}
+
+void mm81x_dbg_dump(struct mm81x *mm, enum mm81x_debug_mask mask,
+		    const char *msg, const char *prefix, const void *buf,
+		    size_t len)
+{
+	const u8 *ptr = buf;
+	char line[256];
+
+	if (!(mm81x_debug_mask & mask))
+		return;
+
+	if (msg)
+		__mm81x_dbg(mm, mask, "%s", msg);
+
+	if (!buf || !len)
+		return;
+
+	while (ptr < (const u8 *)buf + len) {
+		size_t off = ptr - (const u8 *)buf;
+		size_t n = min_t(size_t, 16, (const u8 *)buf + len - ptr);
+		size_t p = 0;
+
+		p += scnprintf(line + p, sizeof(line) - p,
+			       "%s%08zx: ", prefix ? prefix : "", off);
+		hex_dump_to_buffer(ptr, n, 16, 1, line + p, sizeof(line) - p,
+				   true);
+		dev_dbg(mm->dev, "%s\n", line);
+		ptr += n;
+	}
+}
+#endif /* CONFIG_MM81X_DEBUG */
-- 
2.43.0