mfd: Add MAX8907 core driver

The MAX8907 is an I2C-based power-management IC containing voltage
regulators, a reset controller, a real-time clock, and a touch-screen
controller.

The original driver was written by:
* Gyungoh Yoo <jack.yoo@maxim-ic.com>

Various fixes and enhancements by:
* Jin Park <jinyoungp@nvidia.com>
* Tom Cherry <tcherry@nvidia.com>
* Prashant Gaikwad <pgaikwad@nvidia.com>
* Dan Willemsen <dwillemsen@nvidia.com>
* Laxman Dewangan <ldewangan@nvidia.com>

During upstreaming, I (swarren):
* Converted to regmap.
* Converted to regmap-irq.
* Allowed probing from device tree.
* Renamed from max8907c->max8907, since the driver covers at least the
  C and B revisions.
* General cleanup.

Signed-off-by: Gyungoh Yoo <jack.yoo@maxim-ic.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> #v3
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 250 insertions, 0 deletions

diff --git a/include/linux/mfd/max8907.h b/include/linux/mfd/max8907.h
new file mode 100644
index 000000000000..283531fde4e0
--- /dev/null
+++ b/include/linux/mfd/max8907.h
@@ -0,0 +1,250 @@
+/*
+ * Functions to access MAX8907 power management chip.
+ *
+ * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
+ * Copyright (C) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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_MAX8907_H
+#define __LINUX_MFD_MAX8907_H
+
+#include <linux/mutex.h>
+#include <linux/pm.h>
+
+#define MAX8907_GEN_I2C_ADDR		(0x78 >> 1)
+#define MAX8907_ADC_I2C_ADDR		(0x8e >> 1)
+#define MAX8907_RTC_I2C_ADDR		(0xd0 >> 1)
+
+/* MAX8907 register map */
+#define MAX8907_REG_SYSENSEL		0x00
+#define MAX8907_REG_ON_OFF_IRQ1		0x01
+#define MAX8907_REG_ON_OFF_IRQ1_MASK	0x02
+#define MAX8907_REG_ON_OFF_STAT		0x03
+#define MAX8907_REG_SDCTL1		0x04
+#define MAX8907_REG_SDSEQCNT1		0x05
+#define MAX8907_REG_SDV1		0x06
+#define MAX8907_REG_SDCTL2		0x07
+#define MAX8907_REG_SDSEQCNT2		0x08
+#define MAX8907_REG_SDV2		0x09
+#define MAX8907_REG_SDCTL3		0x0A
+#define MAX8907_REG_SDSEQCNT3		0x0B
+#define MAX8907_REG_SDV3		0x0C
+#define MAX8907_REG_ON_OFF_IRQ2		0x0D
+#define MAX8907_REG_ON_OFF_IRQ2_MASK	0x0E
+#define MAX8907_REG_RESET_CNFG		0x0F
+#define MAX8907_REG_LDOCTL16		0x10
+#define MAX8907_REG_LDOSEQCNT16		0x11
+#define MAX8907_REG_LDO16VOUT		0x12
+#define MAX8907_REG_SDBYSEQCNT		0x13
+#define MAX8907_REG_LDOCTL17		0x14
+#define MAX8907_REG_LDOSEQCNT17		0x15
+#define MAX8907_REG_LDO17VOUT		0x16
+#define MAX8907_REG_LDOCTL1		0x18
+#define MAX8907_REG_LDOSEQCNT1		0x19
+#define MAX8907_REG_LDO1VOUT		0x1A
+#define MAX8907_REG_LDOCTL2		0x1C
+#define MAX8907_REG_LDOSEQCNT2		0x1D
+#define MAX8907_REG_LDO2VOUT		0x1E
+#define MAX8907_REG_LDOCTL3		0x20
+#define MAX8907_REG_LDOSEQCNT3		0x21
+#define MAX8907_REG_LDO3VOUT		0x22
+#define MAX8907_REG_LDOCTL4		0x24
+#define MAX8907_REG_LDOSEQCNT4		0x25
+#define MAX8907_REG_LDO4VOUT		0x26
+#define MAX8907_REG_LDOCTL5		0x28
+#define MAX8907_REG_LDOSEQCNT5		0x29
+#define MAX8907_REG_LDO5VOUT		0x2A
+#define MAX8907_REG_LDOCTL6		0x2C
+#define MAX8907_REG_LDOSEQCNT6		0x2D
+#define MAX8907_REG_LDO6VOUT		0x2E
+#define MAX8907_REG_LDOCTL7		0x30
+#define MAX8907_REG_LDOSEQCNT7		0x31
+#define MAX8907_REG_LDO7VOUT		0x32
+#define MAX8907_REG_LDOCTL8		0x34
+#define MAX8907_REG_LDOSEQCNT8		0x35
+#define MAX8907_REG_LDO8VOUT		0x36
+#define MAX8907_REG_LDOCTL9		0x38
+#define MAX8907_REG_LDOSEQCNT9		0x39
+#define MAX8907_REG_LDO9VOUT		0x3A
+#define MAX8907_REG_LDOCTL10		0x3C
+#define MAX8907_REG_LDOSEQCNT10		0x3D
+#define MAX8907_REG_LDO10VOUT		0x3E
+#define MAX8907_REG_LDOCTL11		0x40
+#define MAX8907_REG_LDOSEQCNT11		0x41
+#define MAX8907_REG_LDO11VOUT		0x42
+#define MAX8907_REG_LDOCTL12		0x44
+#define MAX8907_REG_LDOSEQCNT12		0x45
+#define MAX8907_REG_LDO12VOUT		0x46
+#define MAX8907_REG_LDOCTL13		0x48
+#define MAX8907_REG_LDOSEQCNT13		0x49
+#define MAX8907_REG_LDO13VOUT		0x4A
+#define MAX8907_REG_LDOCTL14		0x4C
+#define MAX8907_REG_LDOSEQCNT14		0x4D
+#define MAX8907_REG_LDO14VOUT		0x4E
+#define MAX8907_REG_LDOCTL15		0x50
+#define MAX8907_REG_LDOSEQCNT15		0x51
+#define MAX8907_REG_LDO15VOUT		0x52
+#define MAX8907_REG_OUT5VEN		0x54
+#define MAX8907_REG_OUT5VSEQ		0x55
+#define MAX8907_REG_OUT33VEN		0x58
+#define MAX8907_REG_OUT33VSEQ		0x59
+#define MAX8907_REG_LDOCTL19		0x5C
+#define MAX8907_REG_LDOSEQCNT19		0x5D
+#define MAX8907_REG_LDO19VOUT		0x5E
+#define MAX8907_REG_LBCNFG		0x60
+#define MAX8907_REG_SEQ1CNFG		0x64
+#define MAX8907_REG_SEQ2CNFG		0x65
+#define MAX8907_REG_SEQ3CNFG		0x66
+#define MAX8907_REG_SEQ4CNFG		0x67
+#define MAX8907_REG_SEQ5CNFG		0x68
+#define MAX8907_REG_SEQ6CNFG		0x69
+#define MAX8907_REG_SEQ7CNFG		0x6A
+#define MAX8907_REG_LDOCTL18		0x72
+#define MAX8907_REG_LDOSEQCNT18		0x73
+#define MAX8907_REG_LDO18VOUT		0x74
+#define MAX8907_REG_BBAT_CNFG		0x78
+#define MAX8907_REG_CHG_CNTL1		0x7C
+#define MAX8907_REG_CHG_CNTL2		0x7D
+#define MAX8907_REG_CHG_IRQ1		0x7E
+#define MAX8907_REG_CHG_IRQ2		0x7F
+#define MAX8907_REG_CHG_IRQ1_MASK	0x80
+#define MAX8907_REG_CHG_IRQ2_MASK	0x81
+#define MAX8907_REG_CHG_STAT		0x82
+#define MAX8907_REG_WLED_MODE_CNTL	0x84
+#define MAX8907_REG_ILED_CNTL		0x84
+#define MAX8907_REG_II1RR		0x8E
+#define MAX8907_REG_II2RR		0x8F
+#define MAX8907_REG_LDOCTL20		0x9C
+#define MAX8907_REG_LDOSEQCNT20		0x9D
+#define MAX8907_REG_LDO20VOUT		0x9E
+
+/* RTC register map */
+#define MAX8907_REG_RTC_SEC		0x00
+#define MAX8907_REG_RTC_MIN		0x01
+#define MAX8907_REG_RTC_HOURS		0x02
+#define MAX8907_REG_RTC_WEEKDAY		0x03
+#define MAX8907_REG_RTC_DATE		0x04
+#define MAX8907_REG_RTC_MONTH		0x05
+#define MAX8907_REG_RTC_YEAR1		0x06
+#define MAX8907_REG_RTC_YEAR2		0x07
+#define MAX8907_REG_ALARM0_SEC		0x08
+#define MAX8907_REG_ALARM0_MIN		0x09
+#define MAX8907_REG_ALARM0_HOURS	0x0A
+#define MAX8907_REG_ALARM0_WEEKDAY	0x0B
+#define MAX8907_REG_ALARM0_DATE		0x0C
+#define MAX8907_REG_ALARM0_MONTH	0x0D
+#define MAX8907_REG_ALARM0_YEAR1	0x0E
+#define MAX8907_REG_ALARM0_YEAR2	0x0F
+#define MAX8907_REG_ALARM1_SEC		0x10
+#define MAX8907_REG_ALARM1_MIN		0x11
+#define MAX8907_REG_ALARM1_HOURS	0x12
+#define MAX8907_REG_ALARM1_WEEKDAY	0x13
+#define MAX8907_REG_ALARM1_DATE		0x14
+#define MAX8907_REG_ALARM1_MONTH	0x15
+#define MAX8907_REG_ALARM1_YEAR1	0x16
+#define MAX8907_REG_ALARM1_YEAR2	0x17
+#define MAX8907_REG_ALARM0_CNTL		0x18
+#define MAX8907_REG_ALARM1_CNTL		0x19
+#define MAX8907_REG_RTC_STATUS		0x1A
+#define MAX8907_REG_RTC_CNTL		0x1B
+#define MAX8907_REG_RTC_IRQ		0x1C
+#define MAX8907_REG_RTC_IRQ_MASK	0x1D
+#define MAX8907_REG_MPL_CNTL		0x1E
+
+/* ADC and Touch Screen Controller register map */
+#define MAX8907_CTL			0
+#define MAX8907_SEQCNT			1
+#define MAX8907_VOUT			2
+
+/* mask bit fields */
+#define MAX8907_MASK_LDO_SEQ		0x1C
+#define MAX8907_MASK_LDO_EN		0x01
+#define MAX8907_MASK_VBBATTCV		0x03
+#define MAX8907_MASK_OUT5V_VINEN	0x10
+#define MAX8907_MASK_OUT5V_ENSRC	0x0E
+#define MAX8907_MASK_OUT5V_EN		0x01
+
+/* Regulator IDs */
+#define MAX8907_MBATT	0
+#define MAX8907_SD1	1
+#define MAX8907_SD2	2
+#define MAX8907_SD3	3
+#define MAX8907_LDO1	4
+#define MAX8907_LDO2	5
+#define MAX8907_LDO3	6
+#define MAX8907_LDO4	7
+#define MAX8907_LDO5	8
+#define MAX8907_LDO6	9
+#define MAX8907_LDO7	10
+#define MAX8907_LDO8	11
+#define MAX8907_LDO9	12
+#define MAX8907_LDO10	13
+#define MAX8907_LDO11	14
+#define MAX8907_LDO12	15
+#define MAX8907_LDO13	16
+#define MAX8907_LDO14	17
+#define MAX8907_LDO15	18
+#define MAX8907_LDO16	19
+#define MAX8907_LDO17	20
+#define MAX8907_LDO18	21
+#define MAX8907_LDO19	22
+#define MAX8907_LDO20	23
+#define MAX8907_OUT5V	24
+#define MAX8907_OUT33V	25
+#define MAX8907_BBAT	26
+#define MAX8907_SDBY	27
+#define MAX8907_VRTC	28
+#define MAX8907_NUM_REGULATORS (MAX8907_VRTC + 1)
+
+/* IRQ definitions */
+enum {
+	MAX8907_IRQ_VCHG_DC_OVP = 0,
+	MAX8907_IRQ_VCHG_DC_F,
+	MAX8907_IRQ_VCHG_DC_R,
+	MAX8907_IRQ_VCHG_THM_OK_R,
+	MAX8907_IRQ_VCHG_THM_OK_F,
+	MAX8907_IRQ_VCHG_MBATTLOW_F,
+	MAX8907_IRQ_VCHG_MBATTLOW_R,
+	MAX8907_IRQ_VCHG_RST,
+	MAX8907_IRQ_VCHG_DONE,
+	MAX8907_IRQ_VCHG_TOPOFF,
+	MAX8907_IRQ_VCHG_TMR_FAULT,
+
+	MAX8907_IRQ_GPM_RSTIN = 0,
+	MAX8907_IRQ_GPM_MPL,
+	MAX8907_IRQ_GPM_SW_3SEC,
+	MAX8907_IRQ_GPM_EXTON_F,
+	MAX8907_IRQ_GPM_EXTON_R,
+	MAX8907_IRQ_GPM_SW_1SEC,
+	MAX8907_IRQ_GPM_SW_F,
+	MAX8907_IRQ_GPM_SW_R,
+	MAX8907_IRQ_GPM_SYSCKEN_F,
+	MAX8907_IRQ_GPM_SYSCKEN_R,
+
+	MAX8907_IRQ_RTC_ALARM1 = 0,
+	MAX8907_IRQ_RTC_ALARM0,
+};
+
+struct max8907_platform_data {
+	struct regulator_init_data *init_data[MAX8907_NUM_REGULATORS];
+};
+
+struct regmap_irq_chips_data;
+
+struct max8907 {
+	struct device			*dev;
+	struct mutex			irq_lock;
+	struct i2c_client		*i2c_gen;
+	struct i2c_client		*i2c_rtc;
+	struct regmap			*regmap_gen;
+	struct regmap			*regmap_rtc;
+	struct regmap_irq_chip_data	*irqc_chg;
+	struct regmap_irq_chip_data	*irqc_on_off;
+	struct regmap_irq_chip_data	*irqc_rtc;
+};
+
+#endif