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authorPavel Machek <pavel@ucw.cz>2018-09-11 23:03:44 +0200
committerLee Jones <lee.jones@linaro.org>2018-10-23 08:58:34 +0100
commit7891d37509cca01f383e8349831ee0adc0724e77 (patch)
tree3aa8fdfa52f6e4163f91942e4b7284dda5514b9b /drivers/mfd
parent7a6a395b16c3fdcd2ede2b0ce4bf63f6dafc1fea (diff)
downloadlinux-7891d37509cca01f383e8349831ee0adc0724e77.tar.bz2
mfd: ti-lmu: Use managed resource for everything
This replaces all remaining unmanaged resources with device managed ones, so that the remove function is no longer needed. This makes the code slightly shorter and fixes two problems: 1. The hardware is disabled after the child devices have been removed. Previously there was a potential race condition. 2. The hardware is disabled when mfd_add_devices fails during probe. Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/ti-lmu.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
index e14cb9f41b44..2ee09d099832 100644
--- a/drivers/mfd/ti-lmu.c
+++ b/drivers/mfd/ti-lmu.c
@@ -47,8 +47,9 @@ static int ti_lmu_enable_hw(struct ti_lmu *lmu, enum ti_lmu_id id)
return 0;
}
-static void ti_lmu_disable_hw(struct ti_lmu *lmu)
+static void ti_lmu_disable_hw(void *data)
{
+ struct ti_lmu *lmu = data;
if (lmu->en_gpio)
gpiod_set_value(lmu->en_gpio, 0);
}
@@ -205,6 +206,10 @@ static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
if (ret)
return ret;
+ ret = devm_add_action_or_reset(dev, ti_lmu_disable_hw, lmu);
+ if (ret)
+ return ret;
+
/*
* Fault circuit(open/short) can be detected by ti-lmu-fault-monitor.
* After fault detection is done, some devices should re-initialize
@@ -214,17 +219,8 @@ static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
i2c_set_clientdata(cl, lmu);
- return mfd_add_devices(lmu->dev, 0, data->cells,
- data->num_cells, NULL, 0, NULL);
-}
-
-static int ti_lmu_remove(struct i2c_client *cl)
-{
- struct ti_lmu *lmu = i2c_get_clientdata(cl);
-
- ti_lmu_disable_hw(lmu);
- mfd_remove_devices(lmu->dev);
- return 0;
+ return devm_mfd_add_devices(lmu->dev, 0, data->cells,
+ data->num_cells, NULL, 0, NULL);
}
static const struct i2c_device_id ti_lmu_ids[] = {
@@ -240,7 +236,6 @@ MODULE_DEVICE_TABLE(i2c, ti_lmu_ids);
static struct i2c_driver ti_lmu_driver = {
.probe = ti_lmu_probe,
- .remove = ti_lmu_remove,
.driver = {
.name = "ti-lmu",
.of_match_table = ti_lmu_of_match,