power: Add support for ACT8846 PMIC

Add a driver for the ACT8846 PMIC. This supports several LDOs and BUCKs and
is connected to the I2C bus. This driver supports using a regulator driver
to access the regulators.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/power/act8846_pmic.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _PMIC_ACT8846_H_
+#define _PMIC_ACT8846_H_
+
+#include <asm/gpio.h>
+
+#define ACT8846_NUM_OF_REGS	12
+
+#define BUCK_VOL_MASK 0x3f
+#define LDO_VOL_MASK 0x3f
+
+#define BUCK_EN_MASK 0x80
+#define LDO_EN_MASK 0x80
+
+#define VOL_MIN_IDX 0x00
+#define VOL_MAX_IDX 0x3f
+
+struct  act8846_reg_table {
+	char	*name;
+	char	reg_ctl;
+	char	reg_vol;
+};
+
+struct pmic_act8846 {
+	struct pmic *pmic;
+	int node;	/*device tree node*/
+	struct gpio_desc pwr_hold;
+	struct udevice *dev;
+};
+
+#endif