mfd: Initial max8925 support

Basic Max8925 support, which is a power management IC from Maxim
Semiconductor.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/include/linux/mfd/max8925.h b/include/linux/mfd/max8925.h
new file mode 100644
index 0000000..2326246
--- /dev/null
+++ b/include/linux/mfd/max8925.h
@@ -0,0 +1,119 @@
+/*
+ * Maxim8925 Interface
+ *
+ * Copyright (C) 2009 Marvell International Ltd.
+ *	Haojian Zhuang <haojian.zhuang@marvell.com>
+ *
+ * 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 __LINUX_MFD_MAX8925_H
+#define __LINUX_MFD_MAX8925_H
+
+#include <linux/interrupt.h>
+
+/* Charger registers */
+#define MAX8925_CHG_IRQ1		(0x7e)
+#define MAX8925_CHG_IRQ2		(0x7f)
+#define MAX8925_CHG_IRQ1_MASK		(0x80)
+#define MAX8925_CHG_IRQ2_MASK		(0x81)
+
+/* GPM registers */
+#define MAX8925_SYSENSEL		(0x00)
+#define MAX8925_ON_OFF_IRQ1		(0x01)
+#define MAX8925_ON_OFF_IRQ1_MASK	(0x02)
+#define MAX8925_ON_OFF_STAT		(0x03)
+#define MAX8925_ON_OFF_IRQ2		(0x0d)
+#define MAX8925_ON_OFF_IRQ2_MASK	(0x0e)
+#define MAX8925_RESET_CNFG		(0x0f)
+
+/* Touch registers */
+#define MAX8925_TSC_IRQ			(0x00)
+#define MAX8925_TSC_IRQ_MASK		(0x01)
+
+/* RTC registers */
+#define MAX8925_RTC_STATUS		(0x1a)
+#define MAX8925_RTC_IRQ			(0x1c)
+#define MAX8925_RTC_IRQ_MASK		(0x1d)
+
+/* bit definitions */
+#define CHG_IRQ1_MASK			(0x07)
+#define CHG_IRQ2_MASK			(0xff)
+#define ON_OFF_IRQ1_MASK		(0xff)
+#define ON_OFF_IRQ2_MASK		(0x03)
+#define TSC_IRQ_MASK			(0x03)
+#define RTC_IRQ_MASK			(0x0c)
+
+#define MAX8925_NUM_IRQ			(32)
+
+#define MAX8925_NAME_SIZE		(32)
+
+enum {
+	MAX8925_INVALID = 0,
+	MAX8925_RTC,
+	MAX8925_ADC,
+	MAX8925_GPM,	/* general power management */
+	MAX8925_MAX,
+};
+
+#define MAX8925_IRQ_VCHG_OVP		(0)
+#define MAX8925_IRQ_VCHG_F		(1)
+#define MAX8925_IRQ_VCHG_R		(2)
+#define MAX8925_IRQ_VCHG_THM_OK_R	(8)
+#define MAX8925_IRQ_VCHG_THM_OK_F	(9)
+#define MAX8925_IRQ_VCHG_BATTLOW_F	(10)
+#define MAX8925_IRQ_VCHG_BATTLOW_R	(11)
+#define MAX8925_IRQ_VCHG_RST		(12)
+#define MAX8925_IRQ_VCHG_DONE		(13)
+#define MAX8925_IRQ_VCHG_TOPOFF		(14)
+#define MAX8925_IRQ_VCHG_TMR_FAULT	(15)
+#define MAX8925_IRQ_GPM_RSTIN		(16)
+#define MAX8925_IRQ_GPM_MPL		(17)
+#define MAX8925_IRQ_GPM_SW_3SEC		(18)
+#define MAX8925_IRQ_GPM_EXTON_F		(19)
+#define MAX8925_IRQ_GPM_EXTON_R		(20)
+#define MAX8925_IRQ_GPM_SW_1SEC		(21)
+#define MAX8925_IRQ_GPM_SW_F		(22)
+#define MAX8925_IRQ_GPM_SW_R		(23)
+#define MAX8925_IRQ_GPM_SYSCKEN_F	(24)
+#define MAX8925_IRQ_GPM_SYSCKEN_R	(25)
+
+#define MAX8925_IRQ_TSC_STICK		(0)
+#define MAX8925_IRQ_TSC_NSTICK		(1)
+
+struct max8925_irq {
+	irq_handler_t		handler;
+	void			*data;
+};
+
+struct max8925_chip {
+	struct device		*dev;
+	struct mutex		io_lock;
+	struct mutex		irq_lock;
+	struct i2c_client	*i2c;
+	struct max8925_irq	irq[MAX8925_NUM_IRQ];
+
+	const char		*name;
+	int			chip_id;
+	int			chip_irq;
+};
+
+struct max8925_platform_data {
+	int	chip_id;
+	int	chip_irq;
+};
+
+extern int max8925_reg_read(struct i2c_client *, int);
+extern int max8925_reg_write(struct i2c_client *, int, unsigned char);
+extern int max8925_bulk_read(struct i2c_client *, int, int, unsigned char *);
+extern int max8925_bulk_write(struct i2c_client *, int, int, unsigned char *);
+extern int max8925_set_bits(struct i2c_client *, int, unsigned char,
+			unsigned char);
+
+extern int max8925_device_init(struct max8925_chip *,
+				struct max8925_platform_data *);
+extern void max8925_device_exit(struct max8925_chip *);
+#endif /* __LINUX_MFD_MAX8925_H */
+