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ab8500-bm: Charge only mode fixes for the ab9540

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Fix for charging not getting enabled in charge only mode by
external charger.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones 2013-02-13 11:39:19 +00:00
parent 789ca7b468
commit 8891716e24
4 changed files with 65 additions and 0 deletions
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42
drivers/power/ab8500_charger.c
View File

@ -15,6 +15,7 @@
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
@ -97,6 +98,10 @@
#define AB8500_SW_CONTROL_FALLBACK 0x03
/* Wait for enumeration before charing in us */
#define WAIT_ACA_RID_ENUMERATION (5 * 1000)
/*External charger control*/
#define AB8500_SYS_CHARGER_CONTROL_REG 0x52
#define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03
#define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07
/* UsbLineStatus register - usb types */
enum ab8500_charger_link_status {
@ -1678,6 +1683,29 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
return ret;
}
static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
unsigned long event, void *data)
{
int ret;
struct device *dev = data;
/*Toggle External charger control pin*/
ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
AB8500_SYS_CHARGER_CONTROL_REG,
EXTERNAL_CHARGER_DISABLE_REG_VAL);
if (ret < 0) {
dev_err(dev, "write reg failed %d\n", ret);
goto out;
}
ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
AB8500_SYS_CHARGER_CONTROL_REG,
EXTERNAL_CHARGER_ENABLE_REG_VAL);
if (ret < 0)
dev_err(dev, "Write reg failed %d\n", ret);
out:
return ret;
}
/**
* ab8500_charger_usb_check_enable() - enable usb charging
* @charger: pointer to the ux500_charger structure
@ -3221,6 +3249,10 @@ static int ab8500_charger_suspend(struct platform_device *pdev,
#define ab8500_charger_resume NULL
#endif
static struct notifier_block charger_nb = {
.notifier_call = ab8500_external_charger_prepare,
};
static int ab8500_charger_remove(struct platform_device *pdev)
{
struct ab8500_charger *di = platform_get_drvdata(pdev);
@ -3250,6 +3282,11 @@ static int ab8500_charger_remove(struct platform_device *pdev)
/* Delete the work queue */
destroy_workqueue(di->charger_wq);
/* Unregister external charger enable notifier */
if (!di->ac_chg.enabled)
blocking_notifier_chain_unregister(
&charger_notifier_list, &charger_nb);
flush_scheduled_work();
if (di->usb_chg.enabled)
power_supply_unregister(&di->usb_chg.psy);
@ -3331,6 +3368,11 @@ static int ab8500_charger_probe(struct platform_device *pdev)
di->ac_chg.enabled = di->bm->ac_enabled;
di->ac_chg.external = false;
/*notifier for external charger enabling*/
if (!di->ac_chg.enabled)
blocking_notifier_chain_register(
&charger_notifier_list, &charger_nb);
/* USB supply */
/* power_supply base class */
di->usb_chg.psy.name = "ab8500_usb";

14
drivers/power/abx500_chargalg.c
View File

@ -26,6 +26,7 @@
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/notifier.h>
/* Watchdog kick interval */
#define CHG_WD_INTERVAL (6 * HZ)
@ -243,6 +244,9 @@ struct abx500_chargalg {
struct kobject chargalg_kobject;
};
/*External charger prepare notifier*/
BLOCKING_NOTIFIER_HEAD(charger_notifier_list);
/* Main battery properties */
static enum power_supply_property abx500_chargalg_props[] = {
POWER_SUPPLY_PROP_STATUS,
@ -503,6 +507,8 @@ static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di)
static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable,
int vset, int iset)
{
static int abx500_chargalg_ex_ac_enable_toggle;
if (!di->ac_chg || !di->ac_chg->ops.enable)
return -ENXIO;
@ -515,6 +521,14 @@ static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable,
di->chg_info.ac_iset = iset;
di->chg_info.ac_vset = vset;
/* Enable external charger */
if (enable && di->ac_chg->external &&
!abx500_chargalg_ex_ac_enable_toggle) {
blocking_notifier_call_chain(&charger_notifier_list,
0, di->dev);
abx500_chargalg_ex_ac_enable_toggle++;
}
return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset);
}

7
drivers/power/pm2301_charger.c
View File

@ -1059,6 +1059,13 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
ret = pm2xxx_charger_detection(pm2, &val);
if ((ret == 0) && val) {
/*
* When boot is due to AC charger plug-in,
* read interrupt registers
*/
pm2xxx_reg_read(pm2, PM2XXX_REG_INT1, &val);
pm2xxx_reg_read(pm2, PM2XXX_REG_INT2, &val);
pm2xxx_reg_read(pm2, PM2XXX_REG_INT4, &val);
pm2->ac.charger_connected = 1;
pm2->ac_conn = true;
power_supply_changed(&pm2->ac_chg.psy);

2
include/linux/mfd/abx500/ux500_chargalg.h
View File

@ -41,4 +41,6 @@ struct ux500_charger {
bool external;
};
extern struct blocking_notifier_head charger_notifier_list;
#endif