Re: [RFC PATCH v2 net-next 6/8] net: mscc: ocelot: expose ocelot wm functions

diff --git a/drivers/net/ethernet/mscc/ocelot_wm.c b/drivers/net/ethernet/mscc/ocelot_wm.c
new file mode 100644
index 000000000000..f9a11a6a059d
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_wm.c

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+
+#include "ocelot.h"
+
+/* Watermark encode
+ * Bit 8:   Unit; 0:1, 1:16
+ * Bit 7-0: Value to be multiplied with unit
+ */
+u16 ocelot_wm_enc(u16 value)
+{
+	WARN_ON(value >= 16 * BIT(8));
+
+	if (value >= BIT(8))
+		return BIT(8) | (value / 16);
+
+	return value;
+}
+EXPORT_SYMBOL(ocelot_wm_enc);
+
+u16 ocelot_wm_dec(u16 wm)
+{
+	if (wm & BIT(8))
+		return (wm & GENMASK(7, 0)) * 16;
+
+	return wm;
+}
+EXPORT_SYMBOL(ocelot_wm_dec);
+
+void ocelot_wm_stat(u32 val, u32 *inuse, u32 *maxuse)
+{
+	*inuse = (val & GENMASK(23, 12)) >> 12;
+	*maxuse = val & GENMASK(11, 0);
+}
+EXPORT_SYMBOL(ocelot_wm_stat);
+