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authorPaul Kocialkowski <contact@paulk.fr>2016-09-03 00:09:53 +0200
committerSebastian Reichel <sre@kernel.org>2016-09-05 12:59:49 +0200
commitc65a8b51123a14f6960e4238bfa4673d54ee183a (patch)
tree6c71dafdd88c4ff44c84b4b809229df38061b889 /drivers/power
parent3b5dd3a49496220b35af83c96e3d2ff5716550ae (diff)
downloadlinux-c65a8b51123a14f6960e4238bfa4673d54ee183a.tar.bz2
power: supply: bq24735-charger: Request status GPIO with initial input setup
This requests the status GPIO with initial input setup. It is required to read the GPIO status at probe time and thus correctly avoid sending I2C messages when AC is not plugged. When requesting the GPIO without initial input setup, it always reads 0 which causes probe to fail as it assumes the charger is connected, sends I2C messages and fails. While at it, this switches the driver over to gpiod API. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/bq24735-charger.c39
1 files changed, 12 insertions, 27 deletions
diff --git a/drivers/power/supply/bq24735-charger.c b/drivers/power/supply/bq24735-charger.c
index dc460bb03d84..eb7783b42e0a 100644
--- a/drivers/power/supply/bq24735-charger.c
+++ b/drivers/power/supply/bq24735-charger.c
@@ -25,7 +25,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
@@ -49,6 +49,7 @@ struct bq24735 {
struct i2c_client *client;
struct bq24735_platform *pdata;
struct mutex lock;
+ struct gpio_desc *status_gpio;
bool charging;
};
@@ -177,12 +178,8 @@ static int bq24735_config_charger(struct bq24735 *charger)
static bool bq24735_charger_is_present(struct bq24735 *charger)
{
- struct bq24735_platform *pdata = charger->pdata;
- int ret;
-
- if (pdata->status_gpio_valid) {
- ret = gpio_get_value_cansleep(pdata->status_gpio);
- return ret ^= pdata->status_gpio_active_low == 0;
+ if (charger->status_gpio) {
+ return !gpiod_get_value_cansleep(charger->status_gpio);
} else {
int ac = 0;
@@ -308,7 +305,6 @@ static struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client)
struct device_node *np = client->dev.of_node;
u32 val;
int ret;
- enum of_gpio_flags flags;
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
@@ -317,12 +313,6 @@ static struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client)
return NULL;
}
- pdata->status_gpio = of_get_named_gpio_flags(np, "ti,ac-detect-gpios",
- 0, &flags);
-
- if (flags & OF_GPIO_ACTIVE_LOW)
- pdata->status_gpio_active_low = 1;
-
ret = of_property_read_u32(np, "ti,charge-current", &val);
if (!ret)
pdata->charge_current = val;
@@ -396,21 +386,16 @@ static int bq24735_charger_probe(struct i2c_client *client,
i2c_set_clientdata(client, charger);
- if (gpio_is_valid(charger->pdata->status_gpio)) {
- ret = devm_gpio_request(&client->dev,
- charger->pdata->status_gpio,
- name);
- if (ret) {
- dev_err(&client->dev,
- "Failed GPIO request for GPIO %d: %d\n",
- charger->pdata->status_gpio, ret);
- }
-
- charger->pdata->status_gpio_valid = !ret;
+ charger->status_gpio = devm_gpiod_get_optional(&client->dev,
+ "ti,ac-detect",
+ GPIOD_IN);
+ if (IS_ERR(charger->status_gpio)) {
+ ret = PTR_ERR(charger->status_gpio);
+ dev_err(&client->dev, "Getting gpio failed: %d\n", ret);
+ return ret;
}
- if (!charger->pdata->status_gpio_valid
- || bq24735_charger_is_present(charger)) {
+ if (!charger->status_gpio || bq24735_charger_is_present(charger)) {
ret = bq24735_read_word(client, BQ24735_MANUFACTURER_ID);
if (ret < 0) {
dev_err(&client->dev, "Failed to read manufacturer id : %d\n",