![Rafael J. Wysocki](/assets/img/avatar_default.png)
After commit b2b49ccbdd
(PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME within #ifdef blocks depending on
CONFIG_PM may be dropped now.
Do that in drivers/power/pm2301_charger.c.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1266 lines
30 KiB
C
1266 lines
30 KiB
C
/*
|
|
* Copyright 2012 ST Ericsson.
|
|
*
|
|
* Power supply driver for ST Ericsson pm2xxx_charger charger
|
|
*
|
|
* 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/regulator/consumer.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/mfd/abx500/ab8500.h>
|
|
#include <linux/mfd/abx500/ab8500-bm.h>
|
|
#include <linux/mfd/abx500/ux500_chargalg.h>
|
|
#include <linux/pm2301_charger.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/pm.h>
|
|
|
|
#include "pm2301_charger.h"
|
|
|
|
#define to_pm2xxx_charger_ac_device_info(x) container_of((x), \
|
|
struct pm2xxx_charger, ac_chg)
|
|
#define SLEEP_MIN 50
|
|
#define SLEEP_MAX 100
|
|
#define PM2XXX_AUTOSUSPEND_DELAY 500
|
|
|
|
static int pm2xxx_interrupt_registers[] = {
|
|
PM2XXX_REG_INT1,
|
|
PM2XXX_REG_INT2,
|
|
PM2XXX_REG_INT3,
|
|
PM2XXX_REG_INT4,
|
|
PM2XXX_REG_INT5,
|
|
PM2XXX_REG_INT6,
|
|
};
|
|
|
|
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_AVG,
|
|
};
|
|
|
|
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,
|
|
};
|
|
|
|
static const struct i2c_device_id pm2xxx_ident[] = {
|
|
{ "pm2301", 0 },
|
|
{ }
|
|
};
|
|
|
|
static void set_lpn_pin(struct pm2xxx_charger *pm2)
|
|
{
|
|
if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin)) {
|
|
gpio_set_value(pm2->lpn_pin, 1);
|
|
usleep_range(SLEEP_MIN, SLEEP_MAX);
|
|
}
|
|
}
|
|
|
|
static void clear_lpn_pin(struct pm2xxx_charger *pm2)
|
|
{
|
|
if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin))
|
|
gpio_set_value(pm2->lpn_pin, 0);
|
|
}
|
|
|
|
static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
|
|
{
|
|
int ret;
|
|
|
|
/* wake up the device */
|
|
pm_runtime_get_sync(pm2->dev);
|
|
|
|
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);
|
|
else
|
|
ret = 0;
|
|
|
|
pm_runtime_put_sync(pm2->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
|
|
{
|
|
int ret;
|
|
|
|
/* wake up the device */
|
|
pm_runtime_get_sync(pm2->dev);
|
|
|
|
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);
|
|
else
|
|
ret = 0;
|
|
|
|
pm_runtime_put_sync(pm2->dev);
|
|
|
|
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 SW EOC ctrl */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* Disable charging */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
|
|
(PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS));
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
static 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)
|
|
{
|
|
dev_err(pm2->dev, "Overvoltage detected\n");
|
|
pm2->flags.ovv = true;
|
|
power_supply_changed(&pm2->ac_chg.psy);
|
|
|
|
/* Schedule a new HW failure check */
|
|
queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val)
|
|
{
|
|
dev_dbg(pm2->dev , "20 minutes watchdog expired\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)
|
|
{
|
|
int ret;
|
|
|
|
switch (val) {
|
|
case PM2XXX_INT1_ITVBATLOWR:
|
|
dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n");
|
|
/* Enable SW EOC ctrl */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
|
|
PM2XXX_SWCTRL_SW);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
break;
|
|
|
|
case PM2XXX_INT1_ITVBATLOWF:
|
|
dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n");
|
|
/* Disable SW EOC ctrl */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
|
|
PM2XXX_SWCTRL_HW);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
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 0;
|
|
}
|
|
|
|
static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val)
|
|
{
|
|
int ret;
|
|
|
|
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(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & PM2XXX_INT1_ITVBATLOWR) {
|
|
ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
|
|
PM2XXX_INT1_ITVBATLOWR);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (val & PM2XXX_INT1_ITVBATLOWF) {
|
|
ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
|
|
PM2XXX_INT1_ITVBATLOWF);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (val & PM2XXX_INT1_ITVBATDISCONNECT) {
|
|
ret = pm2xxx_charger_bat_disc_mngt(pm2,
|
|
PM2XXX_INT1_ITVBATDISCONNECT);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int pm2_int_reg1(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) {
|
|
dev_dbg(pm2->dev , "Main charger plugged\n");
|
|
ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, val &
|
|
(PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG));
|
|
}
|
|
|
|
if (val &
|
|
(PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) {
|
|
dev_dbg(pm2->dev , "Main charger unplugged\n");
|
|
ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, val &
|
|
(PM2XXX_INT2_ITVPWR1UNPLUG |
|
|
PM2XXX_INT2_ITVPWR2UNPLUG));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pm2_int_reg2(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & PM2XXX_INT3_ITAUTOTIMEOUTWD)
|
|
ret = pm2xxx_charger_wd_exp_mngt(pm2, val);
|
|
|
|
if (val & (PM2XXX_INT3_ITCHPRECHARGEWD |
|
|
PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) {
|
|
dev_dbg(pm2->dev,
|
|
"Watchdog occurred for precharge, CC and CV charge\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pm2_int_reg3(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & (PM2XXX_INT4_ITCHARGINGON)) {
|
|
dev_dbg(pm2->dev ,
|
|
"chargind operation has started\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT4_ITVRESUME)) {
|
|
dev_dbg(pm2->dev,
|
|
"battery discharged down to VResume threshold\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT4_ITBATTFULL)) {
|
|
dev_dbg(pm2->dev , "battery fully detected\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT4_ITCVPHASE)) {
|
|
dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) {
|
|
pm2->failure_case = VPWR_OVV;
|
|
ret = pm2xxx_charger_ovv_mngt(pm2, val &
|
|
(PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV));
|
|
dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT4_S_ITBATTEMPCOLD |
|
|
PM2XXX_INT4_S_ITBATTEMPHOT)) {
|
|
ret = pm2xxx_charger_batt_therm_mngt(pm2, val &
|
|
(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(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & PM2XXX_INT5_ITVSYSTEMOVV) {
|
|
pm2->failure_case = VSYSTEM_OVV;
|
|
ret = pm2xxx_charger_ovv_mngt(pm2, val &
|
|
PM2XXX_INT5_ITVSYSTEMOVV);
|
|
dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n");
|
|
}
|
|
|
|
if (val & (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, val &
|
|
(PM2XXX_INT5_ITTHERMALWARNINGFALL |
|
|
PM2XXX_INT5_ITTHERMALWARNINGRISE |
|
|
PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
|
|
PM2XXX_INT5_ITTHERMALSHUTDOWNRISE));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pm2_int_reg5(void *pm2_data, int val)
|
|
{
|
|
struct pm2xxx_charger *pm2 = pm2_data;
|
|
int ret = 0;
|
|
|
|
if (val & (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) {
|
|
dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n");
|
|
}
|
|
|
|
if (val & (PM2XXX_INT6_ITVPWR2VALIDRISE |
|
|
PM2XXX_INT6_ITVPWR1VALIDRISE |
|
|
PM2XXX_INT6_ITVPWR2VALIDFALL |
|
|
PM2XXX_INT6_ITVPWR1VALIDFALL)) {
|
|
dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t pm2xxx_irq_int(int irq, void *data)
|
|
{
|
|
struct pm2xxx_charger *pm2 = data;
|
|
struct pm2xxx_interrupts *interrupt = pm2->pm2_int;
|
|
int i;
|
|
|
|
/* wake up the device */
|
|
pm_runtime_get_sync(pm2->dev);
|
|
|
|
do {
|
|
for (i = 0; i < PM2XXX_NUM_INT_REG; i++) {
|
|
pm2xxx_reg_read(pm2,
|
|
pm2xxx_interrupt_registers[i],
|
|
&(interrupt->reg[i]));
|
|
|
|
if (interrupt->reg[i] > 0)
|
|
interrupt->handler[i](pm2, interrupt->reg[i]);
|
|
}
|
|
} while (gpio_get_value(pm2->pdata->gpio_irq_number) == 0);
|
|
|
|
pm_runtime_mark_last_busy(pm2->dev);
|
|
pm_runtime_put_autosuspend(pm2->dev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
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_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 if (pm2->flags.ovv)
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
|
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_AVG:
|
|
pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2);
|
|
val->intval = pm2->ac.cv_active;
|
|
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);
|
|
|
|
/* Disable auto timeout */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG5,
|
|
PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN);
|
|
|
|
/*
|
|
* EOC current level = 100mA
|
|
* Precharge current level = 100mA
|
|
* CC current level = 1000mA
|
|
*/
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6,
|
|
(PM2XXX_DIR_CH_CC_CURRENT_1000MA |
|
|
PM2XXX_CH_PRECH_CURRENT_100MA |
|
|
PM2XXX_CH_EOC_CURRENT_100MA));
|
|
|
|
/*
|
|
* recharge threshold = 3.8V
|
|
* Precharge to CC threshold = 2.9V
|
|
*/
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG7,
|
|
(PM2XXX_CH_PRECH_VOL_2_9 | PM2XXX_CH_VRESUME_VOL_3_8));
|
|
|
|
/* float voltage charger level = 4.2V */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8,
|
|
PM2XXX_CH_VOLT_4_2);
|
|
|
|
/* Voltage drop between VBAT and VSYS in HW charging = 300mV */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG9,
|
|
(PM2XXX_CH_150MV_DROP_300MV | PM2XXX_CHARCHING_INFO_DIS |
|
|
PM2XXX_CH_CC_REDUCED_CURRENT_IDENT |
|
|
PM2XXX_CH_CC_MODEDROP_DIS));
|
|
|
|
/* Input charger level of over voltage = 10V */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR2,
|
|
PM2XXX_VPWR2_OVV_10);
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR1,
|
|
PM2XXX_VPWR1_OVV_10);
|
|
|
|
/* Input charger drop */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR2,
|
|
(PM2XXX_VPWR2_HW_OPT_DIS | PM2XXX_VPWR2_VALID_DIS |
|
|
PM2XXX_VPWR2_DROP_DIS));
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR1,
|
|
(PM2XXX_VPWR1_HW_OPT_DIS | PM2XXX_VPWR1_VALID_DIS |
|
|
PM2XXX_VPWR1_DROP_DIS));
|
|
|
|
/* Disable battery low monitoring */
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_LOW_LEV_COMP_REG,
|
|
PM2XXX_VBAT_LOW_MONITORING_ENA);
|
|
|
|
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) {
|
|
ret = regulator_enable(pm2->regu);
|
|
if (ret)
|
|
dev_warn(pm2->dev,
|
|
"Failed to enable vddadc regulator\n");
|
|
else
|
|
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) {
|
|
dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
|
|
goto error_occured;
|
|
}
|
|
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 pm2xxx write failed\n", __func__);
|
|
goto error_occured;
|
|
}
|
|
|
|
ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
|
|
goto error_occured;
|
|
}
|
|
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 pm2xxx write failed\n", __func__);
|
|
goto error_occured;
|
|
}
|
|
|
|
if (!pm2->bat->enable_overshoot) {
|
|
ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx read failed\n",
|
|
__func__);
|
|
goto error_occured;
|
|
}
|
|
val |= PM2XXX_ANTI_OVERSHOOT_EN;
|
|
ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, val);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx write failed\n",
|
|
__func__);
|
|
goto error_occured;
|
|
}
|
|
}
|
|
|
|
ret = pm2xxx_charging_enable_mngt(pm2);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "Failed to enable"
|
|
"pm2xxx ac charger\n");
|
|
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 < 0) {
|
|
dev_err(pm2->dev, "failed to disable"
|
|
"pm2xxx ac charger\n");
|
|
goto error_occured;
|
|
}
|
|
|
|
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_hw_failure_work(struct work_struct *work)
|
|
{
|
|
u8 reg_value;
|
|
|
|
struct pm2xxx_charger *pm2 = container_of(work,
|
|
struct pm2xxx_charger, check_hw_failure_work.work);
|
|
|
|
if (pm2->flags.ovv) {
|
|
pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, ®_value);
|
|
|
|
if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV |
|
|
PM2XXX_INT4_S_ITVPWR2OVV))) {
|
|
pm2->flags.ovv = false;
|
|
power_supply_changed(&pm2->ac_chg.psy);
|
|
}
|
|
}
|
|
|
|
/* If we still have a failure, schedule a new check */
|
|
if (pm2->flags.ovv) {
|
|
queue_delayed_work(pm2->charger_wq,
|
|
&pm2->check_hw_failure_work, round_jiffies(HZ));
|
|
}
|
|
}
|
|
|
|
static void pm2xxx_charger_check_main_thermal_prot_work(
|
|
struct work_struct *work)
|
|
{
|
|
int ret;
|
|
u8 val;
|
|
|
|
struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger,
|
|
check_main_thermal_prot_work);
|
|
|
|
/* Check if die temp warning is still active */
|
|
ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT5, &val);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
|
|
return;
|
|
}
|
|
if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGRISE
|
|
| PM2XXX_INT5_S_ITTHERMALSHUTDOWNRISE))
|
|
pm2->flags.main_thermal_prot = true;
|
|
else if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGFALL
|
|
| PM2XXX_INT5_S_ITTHERMALSHUTDOWNFALL))
|
|
pm2->flags.main_thermal_prot = false;
|
|
|
|
power_supply_changed(&pm2->ac_chg.psy);
|
|
}
|
|
|
|
static struct pm2xxx_interrupts pm2xxx_int = {
|
|
.handler[0] = pm2_int_reg0,
|
|
.handler[1] = pm2_int_reg1,
|
|
.handler[2] = pm2_int_reg2,
|
|
.handler[3] = pm2_int_reg3,
|
|
.handler[4] = pm2_int_reg4,
|
|
.handler[5] = pm2_int_reg5,
|
|
};
|
|
|
|
static struct pm2xxx_irq pm2xxx_charger_irq[] = {
|
|
{"PM2XXX_IRQ_INT", pm2xxx_irq_int},
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int pm2xxx_wall_charger_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c_client = to_i2c_client(dev);
|
|
struct pm2xxx_charger *pm2;
|
|
|
|
pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
|
|
set_lpn_pin(pm2);
|
|
|
|
/* If we still have a HW failure, schedule a new check */
|
|
if (pm2->flags.ovv)
|
|
queue_delayed_work(pm2->charger_wq,
|
|
&pm2->check_hw_failure_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pm2xxx_wall_charger_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c_client = to_i2c_client(dev);
|
|
struct pm2xxx_charger *pm2;
|
|
|
|
pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
|
|
clear_lpn_pin(pm2);
|
|
|
|
/* Cancel any pending HW failure check */
|
|
if (delayed_work_pending(&pm2->check_hw_failure_work))
|
|
cancel_delayed_work(&pm2->check_hw_failure_work);
|
|
|
|
flush_work(&pm2->ac_work);
|
|
flush_work(&pm2->check_main_thermal_prot_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
static int pm2xxx_runtime_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
|
|
struct pm2xxx_charger *pm2;
|
|
|
|
pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
|
|
clear_lpn_pin(pm2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pm2xxx_runtime_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
|
|
struct pm2xxx_charger *pm2;
|
|
|
|
pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
|
|
|
|
if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0)
|
|
set_lpn_pin(pm2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops pm2xxx_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(pm2xxx_wall_charger_suspend,
|
|
pm2xxx_wall_charger_resume)
|
|
SET_RUNTIME_PM_OPS(pm2xxx_runtime_suspend, pm2xxx_runtime_resume, NULL)
|
|
};
|
|
#define PM2XXX_PM_OPS (&pm2xxx_pm_ops)
|
|
#else
|
|
#define PM2XXX_PM_OPS NULL
|
|
#endif
|
|
|
|
static int 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;
|
|
int i;
|
|
|
|
if (!pl_data) {
|
|
dev_err(&i2c_client->dev, "No platform data supplied\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL);
|
|
if (!pm2) {
|
|
dev_err(&i2c_client->dev, "pm2xxx_charger allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* get parent data */
|
|
pm2->dev = &i2c_client->dev;
|
|
|
|
pm2->pm2_int = &pm2xxx_int;
|
|
|
|
/* 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];
|
|
pm2->ac_chg.wdt_refresh = WD_KICK_INTERVAL;
|
|
pm2->ac_chg.enabled = true;
|
|
pm2->ac_chg.external = true;
|
|
|
|
/* Create a work queue for the charger */
|
|
pm2->charger_wq = create_singlethread_workqueue("pm2xxx_charger_wq");
|
|
if (pm2->charger_wq == NULL) {
|
|
ret = -ENOMEM;
|
|
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);
|
|
|
|
/* Init work for HW failure check */
|
|
INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work,
|
|
pm2xxx_charger_check_hw_failure_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(gpio_to_irq(pm2->pdata->gpio_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,
|
|
gpio_to_irq(pm2->pdata->gpio_irq_number), ret);
|
|
goto unregister_pm2xxx_charger;
|
|
}
|
|
|
|
ret = pm_runtime_set_active(pm2->dev);
|
|
if (ret)
|
|
dev_err(pm2->dev, "set active Error\n");
|
|
|
|
pm_runtime_enable(pm2->dev);
|
|
pm_runtime_set_autosuspend_delay(pm2->dev, PM2XXX_AUTOSUSPEND_DELAY);
|
|
pm_runtime_use_autosuspend(pm2->dev);
|
|
pm_runtime_resume(pm2->dev);
|
|
|
|
/* pm interrupt can wake up system */
|
|
ret = enable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
|
|
if (ret) {
|
|
dev_err(pm2->dev, "failed to set irq wake\n");
|
|
goto unregister_pm2xxx_interrupt;
|
|
}
|
|
|
|
mutex_init(&pm2->lock);
|
|
|
|
if (gpio_is_valid(pm2->pdata->lpn_gpio)) {
|
|
/* get lpn GPIO from platform data */
|
|
pm2->lpn_pin = pm2->pdata->lpn_gpio;
|
|
|
|
/*
|
|
* Charger detection mechanism requires pulling up the LPN pin
|
|
* while i2c communication if Charger is not connected
|
|
* LPN pin of PM2301 is GPIO60 of AB9540
|
|
*/
|
|
ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio");
|
|
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n");
|
|
goto disable_pm2_irq_wake;
|
|
}
|
|
ret = gpio_direction_output(pm2->lpn_pin, 0);
|
|
if (ret < 0) {
|
|
dev_err(pm2->dev, "pm2301_lpm_gpio direction failed\n");
|
|
goto free_gpio;
|
|
}
|
|
set_lpn_pin(pm2);
|
|
}
|
|
|
|
/* read interrupt registers */
|
|
for (i = 0; i < PM2XXX_NUM_INT_REG; i++)
|
|
pm2xxx_reg_read(pm2,
|
|
pm2xxx_interrupt_registers[i],
|
|
&val);
|
|
|
|
ret = pm2xxx_charger_detection(pm2, &val);
|
|
|
|
if ((ret == 0) && val) {
|
|
pm2->ac.charger_connected = 1;
|
|
ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
|
|
AB8500_MAIN_CH_DET);
|
|
pm2->ac_conn = true;
|
|
power_supply_changed(&pm2->ac_chg.psy);
|
|
sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_gpio:
|
|
if (gpio_is_valid(pm2->lpn_pin))
|
|
gpio_free(pm2->lpn_pin);
|
|
disable_pm2_irq_wake:
|
|
disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
|
|
unregister_pm2xxx_interrupt:
|
|
/* disable interrupt */
|
|
free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2);
|
|
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 pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
|
|
{
|
|
struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client);
|
|
|
|
/* Disable pm_runtime */
|
|
pm_runtime_disable(pm2->dev);
|
|
/* Disable AC charging */
|
|
pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
|
|
|
|
/* Disable wake by pm interrupt */
|
|
disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
|
|
|
|
/* Disable interrupts */
|
|
free_irq(gpio_to_irq(pm2->pdata->gpio_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);
|
|
|
|
if (gpio_is_valid(pm2->lpn_pin))
|
|
gpio_free(pm2->lpn_pin);
|
|
|
|
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 = pm2xxx_wall_charger_remove,
|
|
.driver = {
|
|
.name = "pm2xxx-wall_charger",
|
|
.owner = THIS_MODULE,
|
|
.pm = PM2XXX_PM_OPS,
|
|
},
|
|
.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);
|
|
}
|
|
|
|
device_initcall_sync(pm2xxx_charger_init);
|
|
module_exit(pm2xxx_charger_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
|
|
MODULE_ALIAS("i2c:pm2xxx-charger");
|
|
MODULE_DESCRIPTION("PM2xxx charger management driver");
|