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authorlme00437 <benoit.gauthier-nonst@stericsson.com>2012-11-13 14:43:48 +0100
committerLee Jones <lee.jones@linaro.org>2013-03-07 12:35:55 +0800
commita21e22f2f36c65c8453575ffd0cc8267134bb30a (patch)
treefb78409f465950e95646e9fc489e227a35c907c3 /drivers/power/pm2301_charger.c
parent3c01b3676f3fa3813b02742a1816c9d2eff1b27e (diff)
downloadvexpress-lsk-a21e22f2f36c65c8453575ffd0cc8267134bb30a.tar.gz
pm2301-charger: lpn pin used only in C2C boards
This patch restricts use of LPN pin to C2C boards to avoid conflict on HSI for GPIO 60 use. Signed-off-by: Benoit GAUTHIER <benoit.gauthier-xsig@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Mustapha BEN-ZOUBEIR <mustapha.ben.zoubeir-xsig@stericsson.com> Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com> Tested-by: Benoit GAUTHIER <benoit.gauthier-xsig@stericsson.com>
Diffstat (limited to 'drivers/power/pm2301_charger.c')
-rw-r--r--drivers/power/pm2301_charger.c66
1 files changed, 32 insertions, 34 deletions
diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index 87ddc658413..12aeed34bd4 100644
--- a/drivers/power/pm2301_charger.c
+++ b/drivers/power/pm2301_charger.c
@@ -113,17 +113,16 @@ static const struct i2c_device_id pm2xxx_ident[] = {
static void set_lpn_pin(struct pm2xxx_charger *pm2)
{
- gpio_set_value(pm2->lpn_pin, 1);
- usleep_range(SLEEP_MIN, SLEEP_MAX);
-
- return;
+ 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)
{
- gpio_set_value(pm2->lpn_pin, 0);
-
- return;
+ 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)
@@ -1035,14 +1034,6 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
pm2->bat = pl_data->battery;
- /*get lpn GPIO from platform data*/
- if (!pm2->pdata->lpn_gpio) {
- dev_err(pm2->dev, "no lpn gpio data supplied\n");
- ret = -EINVAL;
- goto free_device_info;
- }
- pm2->lpn_pin = pm2->pdata->lpn_gpio;
-
if (!i2c_check_functionality(i2c_client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_READ_WORD_DATA)) {
@@ -1146,23 +1137,28 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
mutex_init(&pm2->lock);
- /*
- * 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;
- }
+ if (gpio_is_valid(pm2->pdata->lpn_gpio)) {
+ /* get lpn GPIO from platform data */
+ pm2->lpn_pin = pm2->pdata->lpn_gpio;
- set_lpn_pin(pm2);
+ /*
+ * 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++)
@@ -1184,7 +1180,8 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
return 0;
free_gpio:
- gpio_free(pm2->lpn_pin);
+ 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:
@@ -1229,7 +1226,8 @@ static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
power_supply_unregister(&pm2->ac_chg.psy);
- gpio_free(pm2->lpn_pin);
+ if (gpio_is_valid(pm2->lpn_pin))
+ gpio_free(pm2->lpn_pin);
kfree(pm2);
@@ -1266,7 +1264,7 @@ static void __exit pm2xxx_charger_exit(void)
i2c_del_driver(&pm2xxx_charger_driver);
}
-subsys_initcall_sync(pm2xxx_charger_init);
+device_initcall_sync(pm2xxx_charger_init);
module_exit(pm2xxx_charger_exit);
MODULE_LICENSE("GPL v2");