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 000000000000..2326246ddef2
--- /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 */
+