mfd: axp20x: Add support for fuel gauge cell driver

#define AXP288_PMIC_ADC_H               0x56

#define AXP288_PMIC_ADC_L               0x57

#define AXP288_ADC_TS_PIN_CTRL          0x84

#define AXP288_PMIC_ADC_EN              0x84

#define AXP288_FG_TUNE5			0xed

/* Fuel Gauge */

#define AXP288_FG_RDC1_REG          0xba

#define AXP288_FG_RDC0_REG          0xbb

#define AXP288_FG_OCVH_REG          0xbc

#define AXP288_FG_OCVL_REG          0xbd

#define AXP288_FG_OCV_CURVE_REG     0xc0

#define AXP288_FG_DES_CAP1_REG      0xe0

#define AXP288_FG_DES_CAP0_REG      0xe1

#define AXP288_FG_CC_MTR1_REG       0xe2

#define AXP288_FG_CC_MTR0_REG       0xe3

#define AXP288_FG_OCV_CAP_REG       0xe4

#define AXP288_FG_CC_CAP_REG        0xe5

#define AXP288_FG_LOW_CAP_REG       0xe6

#define AXP288_FG_TUNE0             0xe8

#define AXP288_FG_TUNE1             0xe9

#define AXP288_FG_TUNE2             0xea

#define AXP288_FG_TUNE3             0xeb

#define AXP288_FG_TUNE4             0xec

#define AXP288_FG_TUNE5             0xed

/* Regulators IDs */

enum {

	const struct regmap_irq_chip	*regmap_irq_chip;

};

#define BATTID_LEN				64

#define OCV_CURVE_SIZE			32

#define MAX_THERM_CURVE_SIZE	25

#define PD_DEF_MIN_TEMP			0

#define PD_DEF_MAX_TEMP			55

struct axp20x_fg_pdata {

	char battid[BATTID_LEN + 1];

	int design_cap;

	int min_volt;

	int max_volt;

	int max_temp;

	int min_temp;

	int cap1;

	int cap0;

	int rdc1;

	int rdc0;

	int ocv_curve[OCV_CURVE_SIZE];

	int tcsz;

	int thermistor_curve[MAX_THERM_CURVE_SIZE][2];

};

#endif /* __LINUX_MFD_AXP20X_H */