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authorPhilipp Zabel <p.zabel@pengutronix.de>2016-02-05 13:41:39 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2017-04-04 17:36:10 +0200
commit62e24c5775ecb387a3eb33701378ccfa6dbc98ee (patch)
tree66b088d3862e20b8680fa7982b9902d83092df40 /drivers/reset
parent0ca10b60ceeb5372da01798ca68c116ae45a6eb6 (diff)
reset: add exported __reset_control_get, return NULL if optional
Rename the internal __reset_control_get/put functions to __reset_control_get/put_internal and add an exported __reset_control_get equivalent to __of_reset_control_get that takes a struct device parameter. This avoids the confusing call to __of_reset_control_get in the non-DT case and fixes the devm_reset_control_get_optional function to return NULL if RESET_CONTROLLER is enabled but dev->of_node == NULL. Fixes: bb475230b8e5 ("reset: make optional functions really optional") Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Ramiro Oliveira <Ramiro.Oliveira@synopsys.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/core.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index f1e5e65388bb..cd739d2fa160 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -275,7 +275,7 @@ int reset_control_status(struct reset_control *rstc)
}
EXPORT_SYMBOL_GPL(reset_control_status);
-static struct reset_control *__reset_control_get(
+static struct reset_control *__reset_control_get_internal(
struct reset_controller_dev *rcdev,
unsigned int index, bool shared)
{
@@ -308,7 +308,7 @@ static struct reset_control *__reset_control_get(
return rstc;
}
-static void __reset_control_put(struct reset_control *rstc)
+static void __reset_control_put_internal(struct reset_control *rstc)
{
lockdep_assert_held(&reset_list_mutex);
@@ -377,7 +377,7 @@ struct reset_control *__of_reset_control_get(struct device_node *node,
}
/* reset_list_mutex also protects the rcdev's reset_control list */
- rstc = __reset_control_get(rcdev, rstc_id, shared);
+ rstc = __reset_control_get_internal(rcdev, rstc_id, shared);
mutex_unlock(&reset_list_mutex);
@@ -385,6 +385,17 @@ struct reset_control *__of_reset_control_get(struct device_node *node,
}
EXPORT_SYMBOL_GPL(__of_reset_control_get);
+struct reset_control *__reset_control_get(struct device *dev, const char *id,
+ int index, bool shared, bool optional)
+{
+ if (dev->of_node)
+ return __of_reset_control_get(dev->of_node, id, index, shared,
+ optional);
+
+ return optional ? NULL : ERR_PTR(-EINVAL);
+}
+EXPORT_SYMBOL_GPL(__reset_control_get);
+
/**
* reset_control_put - free the reset controller
* @rstc: reset controller
@@ -396,7 +407,7 @@ void reset_control_put(struct reset_control *rstc)
return;
mutex_lock(&reset_list_mutex);
- __reset_control_put(rstc);
+ __reset_control_put_internal(rstc);
mutex_unlock(&reset_list_mutex);
}
EXPORT_SYMBOL_GPL(reset_control_put);
@@ -417,8 +428,7 @@ struct reset_control *__devm_reset_control_get(struct device *dev,
if (!ptr)
return ERR_PTR(-ENOMEM);
- rstc = __of_reset_control_get(dev ? dev->of_node : NULL,
- id, index, shared, optional);
+ rstc = __reset_control_get(dev, id, index, shared, optional);
if (!IS_ERR(rstc)) {
*ptr = rstc;
devres_add(dev, ptr);

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