1 files changed, 96 insertions, 0 deletions
diff --git a/include/linux/mfd/max5970.h b/include/linux/mfd/max5970.h
new file mode 100644
index 000000000000..762a7d40c843
--- /dev/null
+++ b/include/linux/mfd/max5970.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Device driver for regulators in MAX5970 and MAX5978 IC
+ *
+ * Copyright (c) 2022 9elements GmbH
+ *
+ * Author: Patrick Rudolph <patrick.rudolph@9elements.com>
+ */
+
+#ifndef _MFD_MAX5970_H
+#define _MFD_MAX5970_H
+
+#include <linux/regmap.h>
+
+#define MAX5970_NUM_SWITCHES 2
+#define MAX5978_NUM_SWITCHES 1
+#define MAX5970_NUM_LEDS     4
+
+struct max5970_data {
+	int num_switches;
+	u32 irng[MAX5970_NUM_SWITCHES];
+	u32 mon_rng[MAX5970_NUM_SWITCHES];
+	u32 shunt_micro_ohms[MAX5970_NUM_SWITCHES];
+};
+
+enum max5970_chip_type {
+	TYPE_MAX5978 = 1,
+	TYPE_MAX5970,
+};
+
+#define MAX5970_REG_CURRENT_L(ch)		(0x01 + (ch) * 4)
+#define MAX5970_REG_CURRENT_H(ch)		(0x00 + (ch) * 4)
+#define MAX5970_REG_VOLTAGE_L(ch)		(0x03 + (ch) * 4)
+#define MAX5970_REG_VOLTAGE_H(ch)		(0x02 + (ch) * 4)
+#define MAX5970_REG_MON_RANGE			0x18
+#define  MAX5970_MON_MASK			0x3
+#define  MAX5970_MON(reg, ch)			(((reg) >> ((ch) * 2)) & MAX5970_MON_MASK)
+#define  MAX5970_MON_MAX_RANGE_UV		16000000
+
+#define MAX5970_REG_CH_UV_WARN_H(ch)		(0x1A + (ch) * 10)
+#define MAX5970_REG_CH_UV_WARN_L(ch)		(0x1B + (ch) * 10)
+#define MAX5970_REG_CH_UV_CRIT_H(ch)		(0x1C + (ch) * 10)
+#define MAX5970_REG_CH_UV_CRIT_L(ch)		(0x1D + (ch) * 10)
+#define MAX5970_REG_CH_OV_WARN_H(ch)		(0x1E + (ch) * 10)
+#define MAX5970_REG_CH_OV_WARN_L(ch)		(0x1F + (ch) * 10)
+#define MAX5970_REG_CH_OV_CRIT_H(ch)		(0x20 + (ch) * 10)
+#define MAX5970_REG_CH_OV_CRIT_L(ch)		(0x21 + (ch) * 10)
+
+#define  MAX5970_VAL2REG_H(x)		(((x) >> 2) & 0xFF)
+#define  MAX5970_VAL2REG_L(x)		((x) & 0x3)
+
+#define MAX5970_REG_DAC_FAST(ch)	(0x2E + (ch))
+
+#define MAX5970_FAST2SLOW_RATIO		200
+
+#define MAX5970_REG_STATUS0		0x31
+#define  MAX5970_CB_IFAULTF(ch)		(1 << (ch))
+#define  MAX5970_CB_IFAULTS(ch)		(1 << ((ch) + 4))
+
+#define MAX5970_REG_STATUS1		0x32
+#define  STATUS1_PROT_MASK		0x3
+#define  STATUS1_PROT(reg) \
+	(((reg) >> 6) & STATUS1_PROT_MASK)
+#define  STATUS1_PROT_SHUTDOWN		0
+#define  STATUS1_PROT_CLEAR_PG		1
+#define  STATUS1_PROT_ALERT_ONLY	2
+
+#define MAX5970_REG_STATUS2		0x33
+#define  MAX5970_IRNG_MASK		0x3
+#define  MAX5970_IRNG(reg, ch) \
+	(((reg) >> ((ch) * 2)) & MAX5970_IRNG_MASK)
+
+#define MAX5970_REG_STATUS3		0x34
+#define  MAX5970_STATUS3_ALERT		BIT(4)
+#define  MAX5970_STATUS3_PG(ch)		BIT(ch)
+
+#define MAX5970_REG_FAULT0		0x35
+#define  UV_STATUS_WARN(ch)		(1 << (ch))
+#define  UV_STATUS_CRIT(ch)		(1 << ((ch) + 4))
+
+#define MAX5970_REG_FAULT1		0x36
+#define  OV_STATUS_WARN(ch)		(1 << (ch))
+#define  OV_STATUS_CRIT(ch)		(1 << ((ch) + 4))
+
+#define MAX5970_REG_FAULT2		0x37
+#define  OC_STATUS_WARN(ch)		(1 << (ch))
+
+#define MAX5970_REG_CHXEN		0x3b
+#define  CHXEN(ch)			(3 << ((ch) * 2))
+
+#define MAX5970_REG_LED_FLASH		0x43
+
+#define MAX_REGISTERS			0x49
+#define ADC_MASK			0x3FF
+
+#endif				/* _MFD_MAX5970_H */