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path: root/drivers/power/bq2415x_charger.c
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Diffstat (limited to 'drivers/power/bq2415x_charger.c')
-rw-r--r--drivers/power/bq2415x_charger.c121
1 files changed, 98 insertions, 23 deletions
diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c
index df893dd1447d..79a37f6d3307 100644
--- a/drivers/power/bq2415x_charger.c
+++ b/drivers/power/bq2415x_charger.c
@@ -1,7 +1,7 @@
/*
* bq2415x charger driver
*
- * Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
+ * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -170,6 +170,8 @@ struct bq2415x_device {
struct bq2415x_platform_data init_data;
struct power_supply charger;
struct delayed_work work;
+ struct power_supply *notify_psy;
+ struct notifier_block nb;
enum bq2415x_mode reported_mode;/* mode reported by hook function */
enum bq2415x_mode mode; /* current configured mode */
enum bq2415x_chip chip;
@@ -795,24 +797,53 @@ static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
}
-/* hook function called by other driver which set reported mode */
-static void bq2415x_hook_function(enum bq2415x_mode mode, void *data)
+static int bq2415x_notifier_call(struct notifier_block *nb,
+ unsigned long val, void *v)
{
- struct bq2415x_device *bq = data;
+ struct bq2415x_device *bq =
+ container_of(nb, struct bq2415x_device, nb);
+ struct power_supply *psy = v;
+ enum bq2415x_mode mode;
+ union power_supply_propval prop;
+ int ret;
+ int mA;
- if (!bq)
- return;
+ if (val != PSY_EVENT_PROP_CHANGED)
+ return NOTIFY_OK;
+
+ if (psy != bq->notify_psy)
+ return NOTIFY_OK;
+
+ dev_dbg(bq->dev, "notifier call was called\n");
+
+ ret = psy->get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
+ if (ret != 0)
+ return NOTIFY_OK;
+
+ mA = prop.intval;
+
+ if (mA == 0)
+ mode = BQ2415X_MODE_OFF;
+ else if (mA < 500)
+ mode = BQ2415X_MODE_NONE;
+ else if (mA < 1800)
+ mode = BQ2415X_MODE_HOST_CHARGER;
+ else
+ mode = BQ2415X_MODE_DEDICATED_CHARGER;
+
+ if (bq->reported_mode == mode)
+ return NOTIFY_OK;
- dev_dbg(bq->dev, "hook function was called\n");
bq->reported_mode = mode;
/* if automode is not enabled do not tell about reported_mode */
if (bq->automode < 1)
- return;
+ return NOTIFY_OK;
sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode");
bq2415x_set_mode(bq, bq->reported_mode);
+ return NOTIFY_OK;
}
/**** timer functions ****/
@@ -1512,9 +1543,11 @@ static int bq2415x_probe(struct i2c_client *client,
int num;
char *name;
struct bq2415x_device *bq;
+ struct device_node *np = client->dev.of_node;
+ struct bq2415x_platform_data *pdata = client->dev.platform_data;
- if (!client->dev.platform_data) {
- dev_err(&client->dev, "platform data not set\n");
+ if (!np && !pdata) {
+ dev_err(&client->dev, "platform data missing\n");
return -ENODEV;
}
@@ -1539,6 +1572,17 @@ static int bq2415x_probe(struct i2c_client *client,
goto error_2;
}
+ if (np) {
+ bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection");
+
+ if (!bq->notify_psy)
+ return -EPROBE_DEFER;
+ }
+ else if (pdata->notify_device)
+ bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
+ else
+ bq->notify_psy = NULL;
+
i2c_set_clientdata(client, bq);
bq->id = num;
@@ -1550,8 +1594,34 @@ static int bq2415x_probe(struct i2c_client *client,
bq->autotimer = 0;
bq->automode = 0;
- memcpy(&bq->init_data, client->dev.platform_data,
- sizeof(bq->init_data));
+ if (np) {
+ ret = of_property_read_u32(np, "ti,current-limit",
+ &bq->init_data.current_limit);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,weak-battery-voltage",
+ &bq->init_data.weak_battery_voltage);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,battery-regulation-voltage",
+ &bq->init_data.battery_regulation_voltage);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,charge-current",
+ &bq->init_data.charge_current);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,termination-current",
+ &bq->init_data.termination_current);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,resistor-sense",
+ &bq->init_data.resistor_sense);
+ if (ret)
+ return ret;
+ } else {
+ memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
+ }
bq2415x_reset_chip(bq);
@@ -1573,16 +1643,20 @@ static int bq2415x_probe(struct i2c_client *client,
goto error_4;
}
- if (bq->init_data.set_mode_hook) {
- if (bq->init_data.set_mode_hook(
- bq2415x_hook_function, bq)) {
- bq->automode = 1;
- bq2415x_set_mode(bq, bq->reported_mode);
- dev_info(bq->dev, "automode enabled\n");
- } else {
- bq->automode = -1;
- dev_info(bq->dev, "automode failed\n");
+ if (bq->notify_psy) {
+ bq->nb.notifier_call = bq2415x_notifier_call;
+ ret = power_supply_reg_notifier(&bq->nb);
+ if (ret) {
+ dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
+ goto error_5;
}
+
+ /* Query for initial reported_mode and set it */
+ bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy);
+ bq2415x_set_mode(bq, bq->reported_mode);
+
+ bq->automode = 1;
+ dev_info(bq->dev, "automode enabled\n");
} else {
bq->automode = -1;
dev_info(bq->dev, "automode not supported\n");
@@ -1594,6 +1668,7 @@ static int bq2415x_probe(struct i2c_client *client,
dev_info(bq->dev, "driver registered\n");
return 0;
+error_5:
error_4:
bq2415x_sysfs_exit(bq);
error_3:
@@ -1614,8 +1689,8 @@ static int bq2415x_remove(struct i2c_client *client)
{
struct bq2415x_device *bq = i2c_get_clientdata(client);
- if (bq->init_data.set_mode_hook)
- bq->init_data.set_mode_hook(NULL, NULL);
+ if (bq->notify_psy)
+ power_supply_unreg_notifier(&bq->nb);
bq2415x_sysfs_exit(bq);
bq2415x_power_supply_exit(bq);

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