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linux-hardened/drivers/power/pm2301_charger.c
Michel JAOUEN 01ec8c5423 pm2301: Provide u9540 support for the pm2301 charger 
AC charger driver for the DB9540 based platforms.

Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com>
Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com>
Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>
2013-01-23 11:33:02 +00:00

1455 lines
36 KiB
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/*
* Power supply driver for ST Ericsson pm2xxx_charger charger
*
* Copyright 2012 ST Ericsson.
*
* 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/abx500/ab8500-gpadc.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/pm2301_charger.h>
#define MAIN_WDOG_ENA 0x01
#define MAIN_WDOG_KICK 0x02
#define MAIN_WDOG_DIS 0x00
#define CHARG_WD_KICK 0x01
#define MAIN_CH_ENA 0x01
#define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
#define MAIN_CH_DET 0x01
#define MAIN_CH_CV_ON 0x04
#define OTP_ENABLE_WD 0x01
#define MAIN_CH_INPUT_CURR_SHIFT 4
#define LED_INDICATOR_PWM_ENA 0x01
#define LED_INDICATOR_PWM_DIS 0x00
#define LED_IND_CUR_5MA 0x04
#define LED_INDICATOR_PWM_DUTY_252_256 0xBF
/* HW failure constants */
#define MAIN_CH_TH_PROT 0x02
#define MAIN_CH_NOK 0x01
/* Watchdog timeout constant */
#define WD_TIMER 0x30 /* 4min */
#define WD_KICK_INTERVAL (60 * HZ)
/* Constant voltage/current */
#define PM2XXX_CONST_CURR 0x0
#define PM2XXX_CONST_VOLT 0x1
/* Lowest charger voltage is 3.39V -> 0x4E */
#define LOW_VOLT_REG 0x4E
#define PM2XXX_BATT_CTRL_REG1 0x00
#define PM2XXX_BATT_CTRL_REG2 0x01
#define PM2XXX_BATT_CTRL_REG3 0x02
#define PM2XXX_BATT_CTRL_REG4 0x03
#define PM2XXX_BATT_CTRL_REG5 0x04
#define PM2XXX_BATT_CTRL_REG6 0x05
#define PM2XXX_BATT_CTRL_REG7 0x06
#define PM2XXX_BATT_CTRL_REG8 0x07
#define PM2XXX_NTC_CTRL_REG1 0x08
#define PM2XXX_NTC_CTRL_REG2 0x09
#define PM2XXX_BATT_CTRL_REG9 0x0A
#define PM2XXX_BATT_STAT_REG1 0x0B
#define PM2XXX_INP_VOLT_VPWR2 0x11
#define PM2XXX_INP_DROP_VPWR2 0x13
#define PM2XXX_INP_VOLT_VPWR1 0x15
#define PM2XXX_INP_DROP_VPWR1 0x17
#define PM2XXX_INP_MODE_VPWR 0x18
#define PM2XXX_BATT_WD_KICK 0x70
#define PM2XXX_DEV_VER_STAT 0x0C
#define PM2XXX_THERM_WARN_CTRL_REG 0x20
#define PM2XXX_BATT_DISC_REG 0x21
#define PM2XXX_BATT_LOW_LEV_COMP_REG 0x22
#define PM2XXX_BATT_LOW_LEV_VAL_REG 0x23
#define PM2XXX_I2C_PAD_CTRL_REG 0x24
#define PM2XXX_SW_CTRL_REG 0x26
#define PM2XXX_LED_CTRL_REG 0x28
#define PM2XXX_REG_INT1 0x40
#define PM2XXX_MASK_REG_INT1 0x50
#define PM2XXX_SRCE_REG_INT1 0x60
#define PM2XXX_REG_INT2 0x41
#define PM2XXX_MASK_REG_INT2 0x51
#define PM2XXX_SRCE_REG_INT2 0x61
#define PM2XXX_REG_INT3 0x42
#define PM2XXX_MASK_REG_INT3 0x52
#define PM2XXX_SRCE_REG_INT3 0x62
#define PM2XXX_REG_INT4 0x43
#define PM2XXX_MASK_REG_INT4 0x53
#define PM2XXX_SRCE_REG_INT4 0x63
#define PM2XXX_REG_INT5 0x44
#define PM2XXX_MASK_REG_INT5 0x54
#define PM2XXX_SRCE_REG_INT5 0x64
#define PM2XXX_REG_INT6 0x45
#define PM2XXX_MASK_REG_INT6 0x55
#define PM2XXX_SRCE_REG_INT6 0x65
#define VPWR_OVV 0x0
#define VSYSTEM_OVV 0x1
/* control Reg 1 */
#define PM2XXX_CH_RESUME_EN 0x1
#define PM2XXX_CH_RESUME_DIS 0x0
/* control Reg 2 */
#define PM2XXX_CH_AUTO_RESUME_EN 0X2
#define PM2XXX_CH_AUTO_RESUME_DIS 0X0
#define PM2XXX_CHARGER_ENA 0x4
#define PM2XXX_CHARGER_DIS 0x0
/* control Reg 3 */
#define PM2XXX_CH_WD_CC_PHASE_OFF 0x0
#define PM2XXX_CH_WD_CC_PHASE_5MIN 0x1
#define PM2XXX_CH_WD_CC_PHASE_10MIN 0x2
#define PM2XXX_CH_WD_CC_PHASE_30MIN 0x3
#define PM2XXX_CH_WD_CC_PHASE_60MIN 0x4
#define PM2XXX_CH_WD_CC_PHASE_120MIN 0x5
#define PM2XXX_CH_WD_CC_PHASE_240MIN 0x6
#define PM2XXX_CH_WD_CC_PHASE_360MIN 0x7
#define PM2XXX_CH_WD_CV_PHASE_OFF (0x0<<3)
#define PM2XXX_CH_WD_CV_PHASE_5MIN (0x1<<3)
#define PM2XXX_CH_WD_CV_PHASE_10MIN (0x2<<3)
#define PM2XXX_CH_WD_CV_PHASE_30MIN (0x3<<3)
#define PM2XXX_CH_WD_CV_PHASE_60MIN (0x4<<3)
#define PM2XXX_CH_WD_CV_PHASE_120MIN (0x5<<3)
#define PM2XXX_CH_WD_CV_PHASE_240MIN (0x6<<3)
#define PM2XXX_CH_WD_CV_PHASE_360MIN (0x7<<3)
/* control Reg 4 */
#define PM2XXX_CH_WD_PRECH_PHASE_OFF 0x0
#define PM2XXX_CH_WD_PRECH_PHASE_1MIN 0x1
#define PM2XXX_CH_WD_PRECH_PHASE_5MIN 0x2
#define PM2XXX_CH_WD_PRECH_PHASE_10MIN 0x3
#define PM2XXX_CH_WD_PRECH_PHASE_30MIN 0x4
#define PM2XXX_CH_WD_PRECH_PHASE_60MIN 0x5
#define PM2XXX_CH_WD_PRECH_PHASE_120MIN 0x6
#define PM2XXX_CH_WD_PRECH_PHASE_240MIN 0x7
/* control Reg 5 */
#define PM2XXX_CH_WD_AUTO_TIMEOUT_NONE 0x0
#define PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN 0x1
/* control Reg 6 */
#define PM2XXX_DIR_CH_CC_CURRENT_MASK 0x0F
#define PM2XXX_DIR_CH_CC_CURRENT_200MA 0x0
#define PM2XXX_DIR_CH_CC_CURRENT_400MA 0x2
#define PM2XXX_DIR_CH_CC_CURRENT_600MA 0x3
#define PM2XXX_DIR_CH_CC_CURRENT_800MA 0x4
#define PM2XXX_DIR_CH_CC_CURRENT_1000MA 0x5
#define PM2XXX_DIR_CH_CC_CURRENT_1200MA 0x6
#define PM2XXX_DIR_CH_CC_CURRENT_1400MA 0x7
#define PM2XXX_DIR_CH_CC_CURRENT_1600MA 0x8
#define PM2XXX_DIR_CH_CC_CURRENT_1800MA 0x9
#define PM2XXX_DIR_CH_CC_CURRENT_2000MA 0xA
#define PM2XXX_DIR_CH_CC_CURRENT_2200MA 0xB
#define PM2XXX_DIR_CH_CC_CURRENT_2400MA 0xC
#define PM2XXX_DIR_CH_CC_CURRENT_2600MA 0xD
#define PM2XXX_DIR_CH_CC_CURRENT_2800MA 0xE
#define PM2XXX_DIR_CH_CC_CURRENT_3000MA 0xF
#define PM2XXX_CH_PRECH_CURRENT_MASK 0x30
#define PM2XXX_CH_PRECH_CURRENT_25MA (0x0<<4)
#define PM2XXX_CH_PRECH_CURRENT_50MA (0x1<<4)
#define PM2XXX_CH_PRECH_CURRENT_75MA (0x2<<4)
#define PM2XXX_CH_PRECH_CURRENT_100MA (0x3<<4)
#define PM2XXX_CH_EOC_CURRENT_MASK 0xC0
#define PM2XXX_CH_EOC_CURRENT_100MA (0x0<<6)
#define PM2XXX_CH_EOC_CURRENT_150MA (0x1<<6)
#define PM2XXX_CH_EOC_CURRENT_300MA (0x2<<6)
#define PM2XXX_CH_EOC_CURRENT_400MA (0x3<<6)
/* control Reg 7 */
#define PM2XXX_CH_PRECH_VOL_2_5 0x0
#define PM2XXX_CH_PRECH_VOL_2_7 0x1
#define PM2XXX_CH_PRECH_VOL_2_9 0x2
#define PM2XXX_CH_PRECH_VOL_3_1 0x3
#define PM2XXX_CH_VRESUME_VOL_3_2 (0x0<<2)
#define PM2XXX_CH_VRESUME_VOL_3_4 (0x1<<2)
#define PM2XXX_CH_VRESUME_VOL_3_6 (0x2<<2)
#define PM2XXX_CH_VRESUME_VOL_3_8 (0x3<<2)
/* control Reg 8 */
#define PM2XXX_CH_VOLT_MASK 0x3F
#define PM2XXX_CH_VOLT_3_5 0x0
#define PM2XXX_CH_VOLT_3_5225 0x1
#define PM2XXX_CH_VOLT_3_6 0x4
#define PM2XXX_CH_VOLT_3_7 0x8
#define PM2XXX_CH_VOLT_4_0 0x14
#define PM2XXX_CH_VOLT_4_175 0x1B
#define PM2XXX_CH_VOLT_4_2 0x1C
#define PM2XXX_CH_VOLT_4_275 0x1F
#define PM2XXX_CH_VOLT_4_3 0x20
/*NTC control register 1*/
#define PM2XXX_BTEMP_HIGH_TH_45 0x0
#define PM2XXX_BTEMP_HIGH_TH_50 0x1
#define PM2XXX_BTEMP_HIGH_TH_55 0x2
#define PM2XXX_BTEMP_HIGH_TH_60 0x3
#define PM2XXX_BTEMP_HIGH_TH_65 0x4
#define PM2XXX_BTEMP_LOW_TH_N5 (0x0<<3)
#define PM2XXX_BTEMP_LOW_TH_0 (0x1<<3)
#define PM2XXX_BTEMP_LOW_TH_5 (0x2<<3)
#define PM2XXX_BTEMP_LOW_TH_10 (0x3<<3)
/*NTC control register 2*/
#define PM2XXX_NTC_BETA_COEFF_3477 0x0
#define PM2XXX_NTC_BETA_COEFF_3964 0x1
#define PM2XXX_NTC_RES_10K (0x0<<2)
#define PM2XXX_NTC_RES_47K (0x1<<2)
#define PM2XXX_NTC_RES_100K (0x2<<2)
#define PM2XXX_NTC_RES_NO_NTC (0x3<<2)
/* control Reg 9 */
#define PM2XXX_CH_CC_MODEDROP_EN 1
#define PM2XXX_CH_CC_MODEDROP_DIS 0
#define PM2XXX_CH_CC_REDUCED_CURRENT_100MA (0x0<<1)
#define PM2XXX_CH_CC_REDUCED_CURRENT_200MA (0x1<<1)
#define PM2XXX_CH_CC_REDUCED_CURRENT_400MA (0x2<<1)
#define PM2XXX_CH_CC_REDUCED_CURRENT_IDENT (0x3<<1)
#define PM2XXX_CHARCHING_INFO_DIS (0<<3)
#define PM2XXX_CHARCHING_INFO_EN (1<<3)
#define PM2XXX_CH_150MV_DROP_300MV (0<<4)
#define PM2XXX_CH_150MV_DROP_150MV (1<<4)
/* charger status register */
#define PM2XXX_CHG_STATUS_OFF 0x0
#define PM2XXX_CHG_STATUS_ON 0x1
#define PM2XXX_CHG_STATUS_FULL 0x2
#define PM2XXX_CHG_STATUS_ERR 0x3
#define PM2XXX_CHG_STATUS_WAIT 0x4
#define PM2XXX_CHG_STATUS_NOBAT 0x5
/* Input charger voltage VPWR2 */
#define PM2XXX_VPWR2_OVV_6_0 0x0
#define PM2XXX_VPWR2_OVV_6_3 0x1
#define PM2XXX_VPWR2_OVV_10 0x2
#define PM2XXX_VPWR2_OVV_NONE 0x3
/* Input charger voltage VPWR1 */
#define PM2XXX_VPWR1_OVV_6_0 0x0
#define PM2XXX_VPWR1_OVV_6_3 0x1
#define PM2XXX_VPWR1_OVV_10 0x2
#define PM2XXX_VPWR1_OVV_NONE 0x3
/* Battery low level comparator control register */
#define PM2XXX_VBAT_LOW_MONITORING_DIS 0x0
#define PM2XXX_VBAT_LOW_MONITORING_ENA 0x1
/* Battery low level value control register */
#define PM2XXX_VBAT_LOW_LEVEL_2_3 0x0
#define PM2XXX_VBAT_LOW_LEVEL_2_4 0x1
#define PM2XXX_VBAT_LOW_LEVEL_2_5 0x2
#define PM2XXX_VBAT_LOW_LEVEL_2_6 0x3
#define PM2XXX_VBAT_LOW_LEVEL_2_7 0x4
#define PM2XXX_VBAT_LOW_LEVEL_2_8 0x5
#define PM2XXX_VBAT_LOW_LEVEL_2_9 0x6
#define PM2XXX_VBAT_LOW_LEVEL_3_0 0x7
#define PM2XXX_VBAT_LOW_LEVEL_3_1 0x8
#define PM2XXX_VBAT_LOW_LEVEL_3_2 0x9
#define PM2XXX_VBAT_LOW_LEVEL_3_3 0xA
#define PM2XXX_VBAT_LOW_LEVEL_3_4 0xB
#define PM2XXX_VBAT_LOW_LEVEL_3_5 0xC
#define PM2XXX_VBAT_LOW_LEVEL_3_6 0xD
#define PM2XXX_VBAT_LOW_LEVEL_3_7 0xE
#define PM2XXX_VBAT_LOW_LEVEL_3_8 0xF
#define PM2XXX_VBAT_LOW_LEVEL_3_9 0x10
#define PM2XXX_VBAT_LOW_LEVEL_4_0 0x11
#define PM2XXX_VBAT_LOW_LEVEL_4_1 0x12
#define PM2XXX_VBAT_LOW_LEVEL_4_2 0x13
/* SW CTRL */
#define PM2XXX_SWCTRL_HW 0x0
#define PM2XXX_SWCTRL_SW 0x1
/* LED Driver Control */
#define PM2XXX_LED_CURRENT_MASK 0x0C
#define PM2XXX_LED_CURRENT_2_5MA (0X0<<2)
#define PM2XXX_LED_CURRENT_1MA (0X1<<2)
#define PM2XXX_LED_CURRENT_5MA (0X2<<2)
#define PM2XXX_LED_CURRENT_10MA (0X3<<2)
#define PM2XXX_LED_SELECT_MASK 0x02
#define PM2XXX_LED_SELECT_EN (0X0<<1)
#define PM2XXX_LED_SELECT_DIS (0X1<<1)
#define PM2XXX_ANTI_OVERSHOOT_MASK 0x01
#define PM2XXX_ANTI_OVERSHOOT_DIS 0X0
#define PM2XXX_ANTI_OVERSHOOT_EN 0X1
#define to_pm2xxx_charger_ac_device_info(x) container_of((x), \
struct pm2xxx_charger, ac_chg)
static int pm2xxx_interrupt_registers[] = {
PM2XXX_REG_INT1,
PM2XXX_REG_INT2,
PM2XXX_REG_INT3,
PM2XXX_REG_INT4,
PM2XXX_REG_INT5,
PM2XXX_REG_INT6,
};
enum pm2xxx_reg_int1 {
PM2XXX_INT1_ITVBATDISCONNECT = 0x02,
PM2XXX_INT1_ITVBATLOWR = 0x04,
PM2XXX_INT1_ITVBATLOWF = 0x08,
};
enum pm2xxx_mask_reg_int1 {
PM2XXX_INT1_M_ITVBATDISCONNECT = 0x02,
PM2XXX_INT1_M_ITVBATLOWR = 0x04,
PM2XXX_INT1_M_ITVBATLOWF = 0x08,
};
enum pm2xxx_source_reg_int1 {
PM2XXX_INT1_S_ITVBATDISCONNECT = 0x02,
PM2XXX_INT1_S_ITVBATLOWR = 0x04,
PM2XXX_INT1_S_ITVBATLOWF = 0x08,
};
enum pm2xxx_reg_int2 {
PM2XXX_INT2_ITVPWR2PLUG = 0x01,
PM2XXX_INT2_ITVPWR2UNPLUG = 0x02,
PM2XXX_INT2_ITVPWR1PLUG = 0x04,
PM2XXX_INT2_ITVPWR1UNPLUG = 0x08,
};
enum pm2xxx_mask_reg_int2 {
PM2XXX_INT2_M_ITVPWR2PLUG = 0x01,
PM2XXX_INT2_M_ITVPWR2UNPLUG = 0x02,
PM2XXX_INT2_M_ITVPWR1PLUG = 0x04,
PM2XXX_INT2_M_ITVPWR1UNPLUG = 0x08,
};
enum pm2xxx_source_reg_int2 {
PM2XXX_INT2_S_ITVPWR2PLUG = 0x03,
PM2XXX_INT2_S_ITVPWR1PLUG = 0x0c,
};
enum pm2xxx_reg_int3 {
PM2XXX_INT3_ITCHPRECHARGEWD = 0x01,
PM2XXX_INT3_ITCHCCWD = 0x02,
PM2XXX_INT3_ITCHCVWD = 0x04,
PM2XXX_INT3_ITAUTOTIMEOUTWD = 0x08,
};
enum pm2xxx_mask_reg_int3 {
PM2XXX_INT3_M_ITCHPRECHARGEWD = 0x01,
PM2XXX_INT3_M_ITCHCCWD = 0x02,
PM2XXX_INT3_M_ITCHCVWD = 0x04,
PM2XXX_INT3_M_ITAUTOTIMEOUTWD = 0x08,
};
enum pm2xxx_source_reg_int3 {
PM2XXX_INT3_S_ITCHPRECHARGEWD = 0x01,
PM2XXX_INT3_S_ITCHCCWD = 0x02,
PM2XXX_INT3_S_ITCHCVWD = 0x04,
PM2XXX_INT3_S_ITAUTOTIMEOUTWD = 0x08,
};
enum pm2xxx_reg_int4 {
PM2XXX_INT4_ITBATTEMPCOLD = 0x01,
PM2XXX_INT4_ITBATTEMPHOT = 0x02,
PM2XXX_INT4_ITVPWR2OVV = 0x04,
PM2XXX_INT4_ITVPWR1OVV = 0x08,
PM2XXX_INT4_ITCHARGINGON = 0x10,
PM2XXX_INT4_ITVRESUME = 0x20,
PM2XXX_INT4_ITBATTFULL = 0x40,
PM2XXX_INT4_ITCVPHASE = 0x80,
};
enum pm2xxx_mask_reg_int4 {
PM2XXX_INT4_M_ITBATTEMPCOLD = 0x01,
PM2XXX_INT4_M_ITBATTEMPHOT = 0x02,
PM2XXX_INT4_M_ITVPWR2OVV = 0x04,
PM2XXX_INT4_M_ITVPWR1OVV = 0x08,
PM2XXX_INT4_M_ITCHARGINGON = 0x10,
PM2XXX_INT4_M_ITVRESUME = 0x20,
PM2XXX_INT4_M_ITBATTFULL = 0x40,
PM2XXX_INT4_M_ITCVPHASE = 0x80,
};
enum pm2xxx_source_reg_int4 {
PM2XXX_INT4_S_ITBATTEMPCOLD = 0x01,
PM2XXX_INT4_S_ITBATTEMPHOT = 0x02,
PM2XXX_INT4_S_ITVPWR2OVV = 0x04,
PM2XXX_INT4_S_ITVPWR1OVV = 0x08,
PM2XXX_INT4_S_ITCHARGINGON = 0x10,
PM2XXX_INT4_S_ITVRESUME = 0x20,
PM2XXX_INT4_S_ITBATTFULL = 0x40,
PM2XXX_INT4_S_ITCVPHASE = 0x80,
};
enum pm2xxx_reg_int5 {
PM2XXX_INT5_ITTHERMALSHUTDOWNRISE = 0x01,
PM2XXX_INT5_ITTHERMALSHUTDOWNFALL = 0x02,
PM2XXX_INT5_ITTHERMALWARNINGRISE = 0x04,
PM2XXX_INT5_ITTHERMALWARNINGFALL = 0x08,
PM2XXX_INT5_ITVSYSTEMOVV = 0x10,
};
enum pm2xxx_mask_reg_int5 {
PM2XXX_INT5_M_ITTHERMALSHUTDOWNRISE = 0x01,
PM2XXX_INT5_M_ITTHERMALSHUTDOWNFALL = 0x02,
PM2XXX_INT5_M_ITTHERMALWARNINGRISE = 0x04,
PM2XXX_INT5_M_ITTHERMALWARNINGFALL = 0x08,
PM2XXX_INT5_M_ITVSYSTEMOVV = 0x10,
};
enum pm2xxx_source_reg_int5 {
PM2XXX_INT5_S_ITTHERMALSHUTDOWNRISE = 0x01,
PM2XXX_INT5_S_ITTHERMALSHUTDOWNFALL = 0x02,
PM2XXX_INT5_S_ITTHERMALWARNINGRISE = 0x04,
PM2XXX_INT5_S_ITTHERMALWARNINGFALL = 0x08,
PM2XXX_INT5_S_ITVSYSTEMOVV = 0x10,
};
enum pm2xxx_reg_int6 {
PM2XXX_INT6_ITVPWR2DROP = 0x01,
PM2XXX_INT6_ITVPWR1DROP = 0x02,
PM2XXX_INT6_ITVPWR2VALIDRISE = 0x04,
PM2XXX_INT6_ITVPWR2VALIDFALL = 0x08,
PM2XXX_INT6_ITVPWR1VALIDRISE = 0x10,
PM2XXX_INT6_ITVPWR1VALIDFALL = 0x20,
};
enum pm2xxx_mask_reg_int6 {
PM2XXX_INT6_M_ITVPWR2DROP = 0x01,
PM2XXX_INT6_M_ITVPWR1DROP = 0x02,
PM2XXX_INT6_M_ITVPWR2VALIDRISE = 0x04,
PM2XXX_INT6_M_ITVPWR2VALIDFALL = 0x08,
PM2XXX_INT6_M_ITVPWR1VALIDRISE = 0x10,
PM2XXX_INT6_M_ITVPWR1VALIDFALL = 0x20,
};
enum pm2xxx_source_reg_int6 {
PM2XXX_INT6_S_ITVPWR2DROP = 0x01,
PM2XXX_INT6_S_ITVPWR1DROP = 0x02,
PM2XXX_INT6_S_ITVPWR2VALIDRISE = 0x04,
PM2XXX_INT6_S_ITVPWR2VALIDFALL = 0x08,
PM2XXX_INT6_S_ITVPWR1VALIDRISE = 0x10,
PM2XXX_INT6_S_ITVPWR1VALIDFALL = 0x20,
};
static enum power_supply_property pm2xxx_charger_ac_props[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int pm2xxx_charger_voltage_map[] = {
3500,
3525,
3550,
3575,
3600,
3625,
3650,
3675,
3700,
3725,
3750,
3775,
3800,
3825,
3850,
3875,
3900,
3925,
3950,
3975,
4000,
4025,
4050,
4075,
4100,
4125,
4150,
4175,
4200,
4225,
4250,
4275,
4300,
};
static int pm2xxx_charger_current_map[] = {
200,
200,
400,
600,
800,
1000,
1200,
1400,
1600,
1800,
2000,
2200,
2400,
2600,
2800,
3000,
};
struct pm2xxx_irq {
char *name;
irqreturn_t (*isr)(int irq, void *data);
};
struct pm2xxx_charger_info {
int charger_connected;
int charger_online;
int charger_voltage;
int cv_active;
bool wd_expired;
};
struct pm2xxx_charger_event_flags {
bool mainextchnotok;
bool main_thermal_prot;
bool ovv;
bool chgwdexp;
};
struct pm2xxx_config {
struct i2c_client *pm2xxx_i2c;
struct i2c_device_id *pm2xxx_id;
};
struct pm2xxx_charger {
struct device *dev;
u8 chip_id;
bool vddadc_en_ac;
struct pm2xxx_config config;
bool ac_conn;
unsigned int gpio_irq;
int vbat;
int old_vbat;
int failure_case;
int failure_input_ovv;
u8 pm2_int[6];
struct ab8500_gpadc *gpadc;
struct regulator *regu;
struct pm2xxx_bm_data *bat;
struct mutex lock;
struct ab8500 *parent;
struct pm2xxx_charger_info ac;
struct pm2xxx_charger_platform_data *pdata;
struct workqueue_struct *charger_wq;
struct delayed_work check_vbat_work;
struct work_struct ac_work;
struct work_struct check_main_thermal_prot_work;
struct ux500_charger ac_chg;
struct pm2xxx_charger_event_flags flags;
};
static const struct i2c_device_id pm2xxx_ident[] = {
{ "pm2301", 0 },
{ }
};
static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
{
int ret;
ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
1, val);
if (ret < 0)
dev_err(pm2->dev, "Error reading register at 0x%x\n", reg);
return ret;
}
static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
{
int ret;
ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
1, &val);
if (ret < 0)
dev_err(pm2->dev, "Error writing register at 0x%x\n", reg);
return ret;
}
static int pm2xxx_charging_enable_mngt(struct pm2xxx_charger *pm2)
{
int ret;
/* Enable charging */
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
(PM2XXX_CH_AUTO_RESUME_EN | PM2XXX_CHARGER_ENA));
return ret;
}
static int pm2xxx_charging_disable_mngt(struct pm2xxx_charger *pm2)
{
int ret;
/* Disable charging */
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
(PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS));
return ret;
}
static int pm2xxx_charger_batt_therm_mngt(struct pm2xxx_charger *pm2, int val)
{
queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
return 0;
}
int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val)
{
queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
return 0;
}
static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val)
{
int ret = 0;
pm2->failure_input_ovv++;
if (pm2->failure_input_ovv < 4) {
ret = pm2xxx_charging_enable_mngt(pm2);
goto out;
} else {
pm2->failure_input_ovv = 0;
dev_err(pm2->dev, "Overvoltage detected\n");
pm2->flags.ovv = true;
power_supply_changed(&pm2->ac_chg.psy);
}
out:
return ret;
}
static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val)
{
dev_dbg(pm2->dev , "20 minutes watchdog occured\n");
pm2->ac.wd_expired = true;
power_supply_changed(&pm2->ac_chg.psy);
return 0;
}
static int pm2xxx_charger_vbat_lsig_mngt(struct pm2xxx_charger *pm2, int val)
{
switch (val) {
case PM2XXX_INT1_ITVBATLOWR:
dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n");
break;
case PM2XXX_INT1_ITVBATLOWF:
dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n");
break;
default:
dev_err(pm2->dev, "Unknown VBAT level\n");
}
return 0;
}
static int pm2xxx_charger_bat_disc_mngt(struct pm2xxx_charger *pm2, int val)
{
dev_dbg(pm2->dev, "battery disconnected\n");
return (pm2xxx_charging_disable_mngt(pm2));
}
static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val)
{
int ret = 0;
ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT2, val);
if (ret < 0) {
dev_err(pm2->dev, "Charger detection failed\n");
goto out;
}
*val &= (PM2XXX_INT2_S_ITVPWR1PLUG | PM2XXX_INT2_S_ITVPWR2PLUG);
out:
return ret;
}
static int pm2xxx_charger_itv_pwr_plug_mngt(struct pm2xxx_charger *pm2, int val)
{
int ret;
u8 read_val;
/*
* Since we can't be sure that the events are received
* synchronously, we have the check if the main charger is
* connected by reading the interrupt source register.
*/
ret = pm2xxx_charger_detection(pm2, &read_val);
if ((ret == 0) && read_val) {
pm2->ac.charger_connected = 1;
pm2->ac_conn = true;
queue_work(pm2->charger_wq, &pm2->ac_work);
}
return ret;
}
static int pm2xxx_charger_itv_pwr_unplug_mngt(struct pm2xxx_charger *pm2,
int val)
{
pm2->ac.charger_connected = 0;
queue_work(pm2->charger_wq, &pm2->ac_work);
return 0;
}
static int pm2_int_reg0(struct pm2xxx_charger *pm2)
{
int ret = 0;
if (pm2->pm2_int[0] &
(PM2XXX_INT1_ITVBATLOWR | PM2XXX_INT1_ITVBATLOWF)) {
ret = pm2xxx_charger_vbat_lsig_mngt(pm2, pm2->pm2_int[0] &
(PM2XXX_INT1_ITVBATLOWR | PM2XXX_INT1_ITVBATLOWF));
}
if (pm2->pm2_int[0] & PM2XXX_INT1_ITVBATDISCONNECT) {
ret = pm2xxx_charger_bat_disc_mngt(pm2,
PM2XXX_INT1_ITVBATDISCONNECT);
}
return ret;
}
static int pm2_int_reg1(struct pm2xxx_charger *pm2)
{
int ret = 0;
if (pm2->pm2_int[1] &
(PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) {
dev_dbg(pm2->dev , "Main charger plugged\n");
ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, pm2->pm2_int[1] &
(PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG));
}
if (pm2->pm2_int[1] &
(PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) {
dev_dbg(pm2->dev , "Main charger unplugged\n");
ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, pm2->pm2_int[1] &
(PM2XXX_INT2_ITVPWR1UNPLUG |
PM2XXX_INT2_ITVPWR2UNPLUG));
}
return ret;
}
static int pm2_int_reg2(struct pm2xxx_charger *pm2)
{
int ret = 0;
if (pm2->pm2_int[2] & PM2XXX_INT3_ITAUTOTIMEOUTWD)
ret = pm2xxx_charger_wd_exp_mngt(pm2, pm2->pm2_int[2]);
if (pm2->pm2_int[2] & (PM2XXX_INT3_ITCHPRECHARGEWD |
PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) {
dev_dbg(pm2->dev,
"Watchdog occured for precharge, CC and CV charge\n");
}
return ret;
}
static int pm2_int_reg3(struct pm2xxx_charger *pm2)
{
int ret = 0;
if (pm2->pm2_int[3] & (PM2XXX_INT4_ITCHARGINGON)) {
dev_dbg(pm2->dev ,
"chargind operation has started\n");
}
if (pm2->pm2_int[3] & (PM2XXX_INT4_ITVRESUME)) {
dev_dbg(pm2->dev,
"battery discharged down to VResume threshold\n");
}
if (pm2->pm2_int[3] & (PM2XXX_INT4_ITBATTFULL)) {
dev_dbg(pm2->dev , "battery fully detected\n");
}
if (pm2->pm2_int[3] & (PM2XXX_INT4_ITCVPHASE)) {
dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n");
}
if (pm2->pm2_int[3] &
(PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) {
pm2->failure_case = VPWR_OVV;
ret = pm2xxx_charger_ovv_mngt(pm2, pm2->pm2_int[3] &
(PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV));
dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n");
}
if (pm2->pm2_int[3] & (PM2XXX_INT4_S_ITBATTEMPCOLD |
PM2XXX_INT4_S_ITBATTEMPHOT)) {
ret = pm2xxx_charger_batt_therm_mngt(pm2,
pm2->pm2_int[3] & (PM2XXX_INT4_S_ITBATTEMPCOLD |
PM2XXX_INT4_S_ITBATTEMPHOT));
dev_dbg(pm2->dev, "BTEMP is too Low/High\n");
}
return ret;
}
static int pm2_int_reg4(struct pm2xxx_charger *pm2)
{
int ret = 0;
if (pm2->pm2_int[4] & PM2XXX_INT5_ITVSYSTEMOVV) {
pm2->failure_case = VSYSTEM_OVV;
ret = pm2xxx_charger_ovv_mngt(pm2, pm2->pm2_int[4] &
PM2XXX_INT5_ITVSYSTEMOVV);
dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n");
}
if (pm2->pm2_int[4] & (PM2XXX_INT5_ITTHERMALWARNINGFALL |
PM2XXX_INT5_ITTHERMALWARNINGRISE |
PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)) {
dev_dbg(pm2->dev, "BTEMP die temperature is too Low/High\n");
ret = pm2xxx_charger_die_therm_mngt(pm2, pm2->pm2_int[4] &
(PM2XXX_INT5_ITTHERMALWARNINGFALL |
PM2XXX_INT5_ITTHERMALWARNINGRISE |
PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
PM2XXX_INT5_ITTHERMALSHUTDOWNRISE));
}
return ret;
}
static int pm2_int_reg5(struct pm2xxx_charger *pm2)
{
if (pm2->pm2_int[5]
& (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) {
dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n");
}
if (pm2->pm2_int[5] & (PM2XXX_INT6_ITVPWR2VALIDRISE |
PM2XXX_INT6_ITVPWR1VALIDRISE |
PM2XXX_INT6_ITVPWR2VALIDFALL |
PM2XXX_INT6_ITVPWR1VALIDFALL)) {
dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n");
}
return 0;
}
static irqreturn_t pm2xxx_irq_int(int irq, void *data)
{
struct pm2xxx_charger *pm2 = data;
int ret, i;
for (i = 0; i < ARRAY_SIZE(pm2->pm2_int); i++) {
ret = pm2xxx_reg_read(pm2, pm2xxx_interrupt_registers[i],
&(pm2->pm2_int[i]));
}
pm2_int_reg0(pm2);
pm2_int_reg1(pm2);
pm2_int_reg2(pm2);
pm2_int_reg3(pm2);
pm2_int_reg4(pm2);
pm2_int_reg5(pm2);
return IRQ_HANDLED;
}
static int pm2xxx_charger_get_ac_voltage(struct pm2xxx_charger *pm2)
{
int vch = 0;
if (pm2->ac.charger_connected) {
vch = ab8500_gpadc_convert(pm2->gpadc, MAIN_CHARGER_V);
if (vch < 0)
dev_err(pm2->dev, "%s gpadc conv failed,\n", __func__);
}
return vch;
}
static int pm2xxx_charger_get_ac_cv(struct pm2xxx_charger *pm2)
{
int ret = 0;
u8 val;
if (pm2->ac.charger_connected && pm2->ac.charger_online) {
ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &val);
if (ret < 0) {
dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
goto out;
}
if (val & PM2XXX_INT4_S_ITCVPHASE)
ret = PM2XXX_CONST_VOLT;
else
ret = PM2XXX_CONST_CURR;
}
out:
return ret;
}
static int pm2xxx_charger_get_ac_current(struct pm2xxx_charger *pm2)
{
int ich = 0;
if (pm2->ac.charger_online) {
ich = ab8500_gpadc_convert(pm2->gpadc, MAIN_CHARGER_C);
if (ich < 0)
dev_err(pm2->dev, "%s gpadc conv failed\n", __func__);
}
return ich;
}
static int pm2xxx_current_to_regval(int curr)
{
int i;
if (curr < pm2xxx_charger_current_map[0])
return 0;
for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_current_map); i++) {
if (curr < pm2xxx_charger_current_map[i])
return (i - 1);
}
i = ARRAY_SIZE(pm2xxx_charger_current_map) - 1;
if (curr == pm2xxx_charger_current_map[i])
return i;
else
return -EINVAL;
}
static int pm2xxx_voltage_to_regval(int curr)
{
int i;
if (curr < pm2xxx_charger_voltage_map[0])
return 0;
for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_voltage_map); i++) {
if (curr < pm2xxx_charger_voltage_map[i])
return i - 1;
}
i = ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1;
if (curr == pm2xxx_charger_voltage_map[i])
return i;
else
return -EINVAL;
}
static int pm2xxx_charger_update_charger_current(struct ux500_charger *charger,
int ich_out)
{
int ret;
int curr_index;
struct pm2xxx_charger *pm2;
u8 val;
if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
pm2 = to_pm2xxx_charger_ac_device_info(charger);
else
return -ENXIO;
curr_index = pm2xxx_current_to_regval(ich_out);
if (curr_index < 0) {
dev_err(pm2->dev,
"Charger current too high: charging not started\n");
return -ENXIO;
}
ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
if (ret >= 0) {
val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
val |= curr_index;
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
if (ret < 0) {
dev_err(pm2->dev,
"%s write failed\n", __func__);
}
}
else
dev_err(pm2->dev, "%s read failed\n", __func__);
return ret;
}
static int pm2xxx_charger_ac_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pm2xxx_charger *pm2;
pm2 = to_pm2xxx_charger_ac_device_info(psy_to_ux500_charger(psy));
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
if (pm2->flags.mainextchnotok)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else if (pm2->ac.wd_expired)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else if (pm2->flags.main_thermal_prot)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = pm2->ac.charger_online;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = pm2->ac.charger_connected;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
pm2->ac.charger_voltage = pm2xxx_charger_get_ac_voltage(pm2);
val->intval = pm2->ac.charger_voltage * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2);
val->intval = pm2->ac.cv_active;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = pm2xxx_charger_get_ac_current(pm2) * 1000;
break;
default:
return -EINVAL;
}
return 0;
}
static int pm2xxx_charging_init(struct pm2xxx_charger *pm2)
{
int ret = 0;
/* enable CC and CV watchdog */
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG3,
(PM2XXX_CH_WD_CV_PHASE_60MIN | PM2XXX_CH_WD_CC_PHASE_60MIN));
if( ret < 0)
return ret;
/* enable precharge watchdog */
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG4,
PM2XXX_CH_WD_PRECH_PHASE_60MIN);
return ret;
}
static int pm2xxx_charger_ac_en(struct ux500_charger *charger,
int enable, int vset, int iset)
{
int ret;
int volt_index;
int curr_index;
u8 val;
struct pm2xxx_charger *pm2 = to_pm2xxx_charger_ac_device_info(charger);
if (enable) {
if (!pm2->ac.charger_connected) {
dev_dbg(pm2->dev, "AC charger not connected\n");
return -ENXIO;
}
dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset);
if (!pm2->vddadc_en_ac) {
regulator_enable(pm2->regu);
pm2->vddadc_en_ac = true;
}
ret = pm2xxx_charging_init(pm2);
if (ret < 0) {
dev_err(pm2->dev, "%s charging init failed\n",
__func__);
goto error_occured;
}
volt_index = pm2xxx_voltage_to_regval(vset);
curr_index = pm2xxx_current_to_regval(iset);
if (volt_index < 0 || curr_index < 0) {
dev_err(pm2->dev,
"Charger voltage or current too high, "
"charging not started\n");
return -ENXIO;
}
ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG8, &val);
if (ret >= 0) {
val &= ~PM2XXX_CH_VOLT_MASK;
val |= volt_index;
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, val);
if (ret < 0) {
dev_err(pm2->dev,
"%s write failed\n", __func__);
goto error_occured;
}
else
dev_err(pm2->dev, "%s read failed\n", __func__);
}
ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
if (ret >= 0) {
val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
val |= curr_index;
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
if (ret < 0) {
dev_err(pm2->dev,
"%s write failed\n", __func__);
goto error_occured;
}
else
dev_err(pm2->dev, "%s read failed\n", __func__);
}
if (!pm2->bat->enable_overshoot) {
ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val);
if (ret >= 0) {
val |= PM2XXX_ANTI_OVERSHOOT_EN;
ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG,
val);
if (ret < 0){
dev_err(pm2->dev, "%s write failed\n",
__func__);
goto error_occured;
}
}
else
dev_err(pm2->dev, "%s read failed\n", __func__);
}
ret = pm2xxx_charging_enable_mngt(pm2);
if (ret) {
dev_err(pm2->dev, "%s write failed\n", __func__);
goto error_occured;
}
pm2->ac.charger_online = 1;
} else {
pm2->ac.charger_online = 0;
pm2->ac.wd_expired = false;
/* Disable regulator if enabled */
if (pm2->vddadc_en_ac) {
regulator_disable(pm2->regu);
pm2->vddadc_en_ac = false;
}
ret = pm2xxx_charging_disable_mngt(pm2);
if (ret) {
dev_err(pm2->dev, "%s write failed\n", __func__);
return ret;
}
dev_dbg(pm2->dev, "PM2301: " "Disabled AC charging\n");
}
power_supply_changed(&pm2->ac_chg.psy);
error_occured:
return ret;
}
static int pm2xxx_charger_watchdog_kick(struct ux500_charger *charger)
{
int ret;
struct pm2xxx_charger *pm2;
if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
pm2 = to_pm2xxx_charger_ac_device_info(charger);
else
return -ENXIO;
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_WD_KICK, WD_TIMER);
if (ret)
dev_err(pm2->dev, "Failed to kick WD!\n");
return ret;
}
static void pm2xxx_charger_ac_work(struct work_struct *work)
{
struct pm2xxx_charger *pm2 = container_of(work,
struct pm2xxx_charger, ac_work);
power_supply_changed(&pm2->ac_chg.psy);
sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
};
static void pm2xxx_charger_check_main_thermal_prot_work(
struct work_struct *work)
{
};
static struct pm2xxx_irq pm2xxx_charger_irq[] = {
{"PM2XXX_IRQ_INT", pm2xxx_irq_int},
};
static int pm2xxx_wall_charger_resume(struct i2c_client *i2c_client)
{
return 0;
}
static int pm2xxx_wall_charger_suspend(struct i2c_client *i2c_client,
pm_message_t state)
{
return 0;
}
static int __devinit pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
const struct i2c_device_id *id)
{
struct pm2xxx_platform_data *pl_data = i2c_client->dev.platform_data;
struct pm2xxx_charger *pm2;
int ret = 0;
u8 val;
pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL);
if (!pm2) {
dev_err(pm2->dev, "pm2xxx_charger allocation failed\n");
return -ENOMEM;
}
/* get parent data */
pm2->dev = &i2c_client->dev;
pm2->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
/* get charger spcific platform data */
if (!pl_data->wall_charger) {
dev_err(pm2->dev, "no charger platform data supplied\n");
ret = -EINVAL;
goto free_device_info;
}
pm2->pdata = pl_data->wall_charger;
/* get battery specific platform data */
if (!pl_data->battery) {
dev_err(pm2->dev, "no battery platform data supplied\n");
ret = -EINVAL;
goto free_device_info;
}
pm2->bat = pl_data->battery;
if (!i2c_check_functionality(i2c_client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_READ_WORD_DATA)) {
ret = -ENODEV;
dev_info(pm2->dev, "pm2301 i2c_check_functionality failed\n");
goto free_device_info;
}
pm2->config.pm2xxx_i2c = i2c_client;
pm2->config.pm2xxx_id = (struct i2c_device_id *) id;
i2c_set_clientdata(i2c_client, pm2);
/* AC supply */
/* power_supply base class */
pm2->ac_chg.psy.name = pm2->pdata->label;
pm2->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
pm2->ac_chg.psy.properties = pm2xxx_charger_ac_props;
pm2->ac_chg.psy.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props);
pm2->ac_chg.psy.get_property = pm2xxx_charger_ac_get_property;
pm2->ac_chg.psy.supplied_to = pm2->pdata->supplied_to;
pm2->ac_chg.psy.num_supplicants = pm2->pdata->num_supplicants;
/* pm2xxx_charger sub-class */
pm2->ac_chg.ops.enable = &pm2xxx_charger_ac_en;
pm2->ac_chg.ops.kick_wd = &pm2xxx_charger_watchdog_kick;
pm2->ac_chg.ops.update_curr = &pm2xxx_charger_update_charger_current;
pm2->ac_chg.max_out_volt = pm2xxx_charger_voltage_map[
ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1];
pm2->ac_chg.max_out_curr = pm2xxx_charger_current_map[
ARRAY_SIZE(pm2xxx_charger_current_map) - 1];
/* Create a work queue for the charger */
pm2->charger_wq =
create_singlethread_workqueue("pm2xxx_charger_wq");
if (pm2->charger_wq == NULL) {
dev_err(pm2->dev, "failed to create work queue\n");
goto free_device_info;
}
/* Init work for charger detection */
INIT_WORK(&pm2->ac_work, pm2xxx_charger_ac_work);
/* Init work for checking HW status */
INIT_WORK(&pm2->check_main_thermal_prot_work,
pm2xxx_charger_check_main_thermal_prot_work);
/*
* VDD ADC supply needs to be enabled from this driver when there
* is a charger connected to avoid erroneous BTEMP_HIGH/LOW
* interrupts during charging
*/
pm2->regu = regulator_get(pm2->dev, "vddadc");
if (IS_ERR(pm2->regu)) {
ret = PTR_ERR(pm2->regu);
dev_err(pm2->dev, "failed to get vddadc regulator\n");
goto free_charger_wq;
}
/* Register AC charger class */
ret = power_supply_register(pm2->dev, &pm2->ac_chg.psy);
if (ret) {
dev_err(pm2->dev, "failed to register AC charger\n");
goto free_regulator;
}
/* Register interrupts */
ret = request_threaded_irq(pm2->pdata->irq_number, NULL,
pm2xxx_charger_irq[0].isr,
pm2->pdata->irq_type,
pm2xxx_charger_irq[0].name, pm2);
if (ret != 0) {
dev_err(pm2->dev, "failed to request %s IRQ %d: %d\n",
pm2xxx_charger_irq[0].name, pm2->pdata->irq_number, ret);
goto unregister_pm2xxx_charger;
}
/*
* I2C Read/Write will fail, if AC adaptor is not connected.
* fix the charger detection mechanism.
*/
ret = pm2xxx_charger_detection(pm2, &val);
if ((ret == 0) && val) {
pm2->ac.charger_connected = 1;
pm2->ac_conn = true;
power_supply_changed(&pm2->ac_chg.psy);
sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
}
return 0;
unregister_pm2xxx_charger:
/* unregister power supply */
power_supply_unregister(&pm2->ac_chg.psy);
free_regulator:
/* disable the regulator */
regulator_put(pm2->regu);
free_charger_wq:
destroy_workqueue(pm2->charger_wq);
free_device_info:
kfree(pm2);
return ret;
}
static int __devexit pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
{
struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client);
/* Disable AC charging */
pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
/* Disable interrupts */
free_irq(pm2->pdata->irq_number, pm2);
/* Delete the work queue */
destroy_workqueue(pm2->charger_wq);
flush_scheduled_work();
/* disable the regulator */
regulator_put(pm2->regu);
power_supply_unregister(&pm2->ac_chg.psy);
kfree(pm2);
return 0;
}
static const struct i2c_device_id pm2xxx_id[] = {
{ "pm2301", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pm2xxx_id);
static struct i2c_driver pm2xxx_charger_driver = {
.probe = pm2xxx_wall_charger_probe,
.remove = __devexit_p(pm2xxx_wall_charger_remove),
.suspend = pm2xxx_wall_charger_suspend,
.resume = pm2xxx_wall_charger_resume,
.driver = {
.name = "pm2xxx-wall_charger",
.owner = THIS_MODULE,
},
.id_table = pm2xxx_id,
};
static int __init pm2xxx_charger_init(void)
{
return i2c_add_driver(&pm2xxx_charger_driver);
}
static void __exit pm2xxx_charger_exit(void)
{
i2c_del_driver(&pm2xxx_charger_driver);
}
subsys_initcall_sync(pm2xxx_charger_init);
module_exit(pm2xxx_charger_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
MODULE_ALIAS("platform:pm2xxx-charger");
MODULE_DESCRIPTION("PM2xxx charger management driver");
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