* [PATCH 1/3] reset: Fix of_reset_control_get() for consistent return values
@ 2022-08-05 12:59 Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 2/3] reset: implement reset_control_get_optional() Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 3/3] reset: implement reset_control_get_count() Ahmad Fatoum
0 siblings, 2 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2022-08-05 12:59 UTC (permalink / raw)
To: barebox; +Cc: Ahmad Fatoum
When of_reset_control_get() is called without connection ID it returns
-ENOENT when the 'resets' property doesn't exists or is an empty entry.
However when a connection ID is given it returns -EINVAL when the 'resets'
property doesn't exists or the requested name can't be found. This is
because the error code returned by of_property_match_string() is just
passed down as an index to of_parse_phandle_with_args(), which then
returns -EINVAL.
To get a consistent return value with both code paths we must return
-ENOENT when of_property_match_string() fails.
Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
[afa: ported from Linux 3d81216fde465e76c5eae98f61d3666163634395]
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/reset/core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 4355c3415eb0..93fbaeccafd2 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -236,8 +236,11 @@ struct reset_control *of_reset_control_get(struct device_node *node,
{
int index = 0;
- if (id)
+ if (id) {
index = of_property_match_string(node, "reset-names", id);
+ if (index < 0)
+ return ERR_PTR(-ENOENT);
+ }
return of_reset_control_get_by_index(node, index);
}
--
2.30.2
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 2/3] reset: implement reset_control_get_optional()
2022-08-05 12:59 [PATCH 1/3] reset: Fix of_reset_control_get() for consistent return values Ahmad Fatoum
@ 2022-08-05 12:59 ` Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 3/3] reset: implement reset_control_get_count() Ahmad Fatoum
1 sibling, 0 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2022-08-05 12:59 UTC (permalink / raw)
To: barebox; +Cc: Ahmad Fatoum
Make porting kernel code easier by providing a compatible
reset_control_get_optional() function.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
include/linux/reset.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/reset.h b/include/linux/reset.h
index d0677b1d9f63..91e9cdfb3279 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -73,4 +73,10 @@ static inline int device_reset_all(struct device_d *dev)
#endif /* CONFIG_RESET_CONTROLLER */
+static inline struct reset_control *reset_control_get_optional(struct device_d *dev, const char *id)
+{
+ struct reset_control *rstc = reset_control_get(dev, id);
+ return rstc == ERR_PTR(-ENOENT) ? NULL : rstc;
+}
+
#endif
--
2.30.2
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 3/3] reset: implement reset_control_get_count()
2022-08-05 12:59 [PATCH 1/3] reset: Fix of_reset_control_get() for consistent return values Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 2/3] reset: implement reset_control_get_optional() Ahmad Fatoum
@ 2022-08-05 12:59 ` Ahmad Fatoum
1 sibling, 0 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2022-08-05 12:59 UTC (permalink / raw)
To: barebox; +Cc: Ahmad Fatoum
We have a nearly equivalent of_reset_control_get_count(). Rename it and
adjust the prototype to make kernel code easier to port.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/reset/core.c | 10 +++++-----
include/linux/reset.h | 7 +++++++
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 93fbaeccafd2..b252f94d6eb9 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -157,14 +157,14 @@ int reset_control_deassert(struct reset_control *rstc)
EXPORT_SYMBOL_GPL(reset_control_deassert);
/**
- * of_reset_control_count - Count reset lines
- * @node: device node
+ * reset_control_get_count - Count reset lines
+ * @dev: device
*
* Returns number of resets, 0 if none specified
*/
-static int of_reset_control_count(struct device_node *node)
+int reset_control_get_count(struct device_d *dev)
{
- return of_count_phandle_with_args(node, "resets", "#reset-cells");
+ return of_count_phandle_with_args(dev->device_node, "resets", "#reset-cells");
}
/**
@@ -357,7 +357,7 @@ int device_reset_all(struct device_d *dev)
struct reset_control *rstc;
int ret, i;
- for (i = 0; i < of_reset_control_count(dev->device_node); i++) {
+ for (i = 0; i < reset_control_get_count(dev); i++) {
int ret;
rstc = of_reset_control_get_by_index(dev->device_node, i);
diff --git a/include/linux/reset.h b/include/linux/reset.h
index 91e9cdfb3279..c1282a84c72c 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -24,6 +24,8 @@ int __must_check device_reset_us(struct device_d *dev, int us);
int __must_check device_reset_all(struct device_d *dev);
+int reset_control_get_count(struct device_d *dev);
+
#else
static inline int reset_control_status(struct reset_control *rstc)
@@ -71,6 +73,11 @@ static inline int device_reset_all(struct device_d *dev)
return 0;
}
+static inline int reset_control_get_count(struct device_d *dev)
+{
+ return 0;
+}
+
#endif /* CONFIG_RESET_CONTROLLER */
static inline struct reset_control *reset_control_get_optional(struct device_d *dev, const char *id)
--
2.30.2
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-08-05 13:02 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-08-05 12:59 [PATCH 1/3] reset: Fix of_reset_control_get() for consistent return values Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 2/3] reset: implement reset_control_get_optional() Ahmad Fatoum
2022-08-05 12:59 ` [PATCH 3/3] reset: implement reset_control_get_count() Ahmad Fatoum
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