[1/8] hwspinlock: Add one new API to support getting a specific hwlock by the name
diff mbox

Message ID c23ed23d6d355e80401abce6242523f32ce480fd.1529654288.git.baolin.wang@linaro.org
State New
Headers show

Commit Message

Baolin Wang June 22, 2018, 8:08 a.m. UTC
The hardware spinlock binding already supplied the 'hwlock-names' property
to match and get a specific hwlock, but did not supply one API for users
to get a specific hwlock by the hwlock name. So this patch introduces one
API to support this requirement.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
 drivers/hwspinlock/hwspinlock_core.c |   29 +++++++++++++++++++++++++++++
 include/linux/hwspinlock.h           |    7 +++++++
 2 files changed, 36 insertions(+)

Comments

Bjorn Andersson June 26, 2018, 8:54 p.m. UTC | #1
On Fri 22 Jun 01:08 PDT 2018, Baolin Wang wrote:

> The hardware spinlock binding already supplied the 'hwlock-names' property
> to match and get a specific hwlock, but did not supply one API for users
> to get a specific hwlock by the hwlock name. So this patch introduces one
> API to support this requirement.
> 
> Signed-off-by: Baolin Wang <baolin.wang@linaro.org>

Thanks Baolin,

Picked up all but patch 6 from the series; including 7 and 8 with Mark's
ack.

Regards,
Bjorn

> ---
>  drivers/hwspinlock/hwspinlock_core.c |   29 +++++++++++++++++++++++++++++
>  include/linux/hwspinlock.h           |    7 +++++++
>  2 files changed, 36 insertions(+)
> 
> diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
> index d16e6a3..bea3586 100644
> --- a/drivers/hwspinlock/hwspinlock_core.c
> +++ b/drivers/hwspinlock/hwspinlock_core.c
> @@ -367,6 +367,35 @@ int of_hwspin_lock_get_id(struct device_node *np, int index)
>  }
>  EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id);
>  
> +/**
> + * of_hwspin_lock_get_id_byname() - get lock id for an specified hwlock name
> + * @np: device node from which to request the specific hwlock
> + * @name: hwlock name
> + *
> + * This function provides a means for DT users of the hwspinlock module to
> + * get the global lock id of a specific hwspinlock using the specified name of
> + * the hwspinlock device, so that it can be requested using the normal
> + * hwspin_lock_request_specific() API.
> + *
> + * Returns the global lock id number on success, -EPROBE_DEFER if the hwspinlock
> + * device is not yet registered, -EINVAL on invalid args specifier value or an
> + * appropriate error as returned from the OF parsing of the DT client node.
> + */
> +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
> +{
> +	int index;
> +
> +	if (!name)
> +		return -EINVAL;
> +
> +	index = of_property_match_string(np, "hwlock-names", name);
> +	if (index < 0)
> +		return index;
> +
> +	return of_hwspin_lock_get_id(np, index);
> +}
> +EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id_byname);
> +
>  static int hwspin_lock_register_single(struct hwspinlock *hwlock, int id)
>  {
>  	struct hwspinlock *tmp;
> diff --git a/include/linux/hwspinlock.h b/include/linux/hwspinlock.h
> index 57537e6..2b6f389 100644
> --- a/include/linux/hwspinlock.h
> +++ b/include/linux/hwspinlock.h
> @@ -66,6 +66,7 @@ int __hwspin_lock_timeout(struct hwspinlock *, unsigned int, int,
>  							unsigned long *);
>  int __hwspin_trylock(struct hwspinlock *, int, unsigned long *);
>  void __hwspin_unlock(struct hwspinlock *, int, unsigned long *);
> +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name);
>  
>  #else /* !CONFIG_HWSPINLOCK */
>  
> @@ -125,6 +126,12 @@ static inline int hwspin_lock_get_id(struct hwspinlock *hwlock)
>  	return 0;
>  }
>  
> +static inline
> +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
> +{
> +	return 0;
> +}
> +
>  #endif /* !CONFIG_HWSPINLOCK */
>  
>  /**
> -- 
> 1.7.9.5
> 
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Baolin Wang June 27, 2018, 2:18 a.m. UTC | #2
On 27 June 2018 at 04:54, Bjorn Andersson <bjorn.andersson@linaro.org> wrote:
> On Fri 22 Jun 01:08 PDT 2018, Baolin Wang wrote:
>
>> The hardware spinlock binding already supplied the 'hwlock-names' property
>> to match and get a specific hwlock, but did not supply one API for users
>> to get a specific hwlock by the hwlock name. So this patch introduces one
>> API to support this requirement.
>>
>> Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
>
> Thanks Baolin,
>
> Picked up all but patch 6 from the series; including 7 and 8 with Mark's
> ack.

OK. Thanks Bjorn and Mark.

Patch
diff mbox

diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index d16e6a3..bea3586 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -367,6 +367,35 @@  int of_hwspin_lock_get_id(struct device_node *np, int index)
 }
 EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id);
 
+/**
+ * of_hwspin_lock_get_id_byname() - get lock id for an specified hwlock name
+ * @np: device node from which to request the specific hwlock
+ * @name: hwlock name
+ *
+ * This function provides a means for DT users of the hwspinlock module to
+ * get the global lock id of a specific hwspinlock using the specified name of
+ * the hwspinlock device, so that it can be requested using the normal
+ * hwspin_lock_request_specific() API.
+ *
+ * Returns the global lock id number on success, -EPROBE_DEFER if the hwspinlock
+ * device is not yet registered, -EINVAL on invalid args specifier value or an
+ * appropriate error as returned from the OF parsing of the DT client node.
+ */
+int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
+{
+	int index;
+
+	if (!name)
+		return -EINVAL;
+
+	index = of_property_match_string(np, "hwlock-names", name);
+	if (index < 0)
+		return index;
+
+	return of_hwspin_lock_get_id(np, index);
+}
+EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id_byname);
+
 static int hwspin_lock_register_single(struct hwspinlock *hwlock, int id)
 {
 	struct hwspinlock *tmp;
diff --git a/include/linux/hwspinlock.h b/include/linux/hwspinlock.h
index 57537e6..2b6f389 100644
--- a/include/linux/hwspinlock.h
+++ b/include/linux/hwspinlock.h
@@ -66,6 +66,7 @@  int __hwspin_lock_timeout(struct hwspinlock *, unsigned int, int,
 							unsigned long *);
 int __hwspin_trylock(struct hwspinlock *, int, unsigned long *);
 void __hwspin_unlock(struct hwspinlock *, int, unsigned long *);
+int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name);
 
 #else /* !CONFIG_HWSPINLOCK */
 
@@ -125,6 +126,12 @@  static inline int hwspin_lock_get_id(struct hwspinlock *hwlock)
 	return 0;
 }
 
+static inline
+int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
+{
+	return 0;
+}
+
 #endif /* !CONFIG_HWSPINLOCK */
 
 /**