v4.19.13 snapshot.
diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h
new file mode 100644
index 0000000..2580c08
--- /dev/null
+++ b/include/linux/mfd/hi6421-pmic.h
@@ -0,0 +1,46 @@
+/*
+ * Header file for device driver Hi6421 PMIC
+ *
+ * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
+ * http://www.hisilicon.com
+ * Copyright (c) <2013-2014> Linaro Ltd.
+ * http://www.linaro.org
+ *
+ * Author: Guodong Xu <guodong.xu@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __HI6421_PMIC_H
+#define __HI6421_PMIC_H
+
+/* Hi6421 registers are mapped to memory bus in 4 bytes stride */
+#define HI6421_REG_TO_BUS_ADDR(x) (x << 2)
+
+/* Hi6421 maximum register number */
+#define HI6421_REG_MAX 0xFF
+
+/* Hi6421 OCP (over current protection) and DEB (debounce) control register */
+#define HI6421_OCP_DEB_CTRL_REG HI6421_REG_TO_BUS_ADDR(0x51)
+#define HI6421_OCP_DEB_SEL_MASK 0x0C
+#define HI6421_OCP_DEB_SEL_8MS 0x00
+#define HI6421_OCP_DEB_SEL_16MS 0x04
+#define HI6421_OCP_DEB_SEL_32MS 0x08
+#define HI6421_OCP_DEB_SEL_64MS 0x0C
+#define HI6421_OCP_EN_DEBOUNCE_MASK 0x02
+#define HI6421_OCP_EN_DEBOUNCE_ENABLE 0x02
+#define HI6421_OCP_AUTO_STOP_MASK 0x01
+#define HI6421_OCP_AUTO_STOP_ENABLE 0x01
+
+struct hi6421_pmic {
+ struct regmap *regmap;
+};
+
+enum hi6421_type {
+ HI6421 = 0,
+ HI6421_V530,
+};
+
+#endif /* __HI6421_PMIC_H */