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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 3/5] driver: implement find_device() helper
Date: Mon,  5 Sep 2022 12:35:44 +0200	[thread overview]
Message-ID: <20220905103546.1476277-4-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20220905103546.1476277-1-a.fatoum@pengutronix.de>

For use in commands like done in the follow-up commits, it can be useful
to have a best effort find_device, that not only finds by device name,
but also by device tree path or alias. Add such a helper.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/base/driver.c | 16 ++++++++++++++++
 include/driver.h      |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 072870bea444..cbe1c974f4fe 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -46,6 +46,22 @@ LIST_HEAD(active_device_list);
 EXPORT_SYMBOL(active_device_list);
 static LIST_HEAD(deferred);
 
+struct device_d *find_device(const char *str)
+{
+	struct device_d *dev;
+	struct device_node *np;
+
+	dev = get_device_by_name(str);
+	if (dev)
+		return dev;
+
+	np = of_find_node_by_path_or_alias(NULL, str);
+	if (np)
+		return of_find_device_by_node(np);
+
+	return NULL;
+}
+
 struct device_d *get_device_by_name(const char *name)
 {
 	struct device_d *dev;
diff --git a/include/driver.h b/include/driver.h
index 67ffbba6be80..543287a27638 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -169,6 +169,11 @@ struct device_d *get_device_by_type(ulong type, struct device_d *last);
 struct device_d *get_device_by_id(const char *id);
 struct device_d *get_device_by_name(const char *name);
 
+/* Find a device by name and if not found look up by device tree path
+ * or alias
+ */
+struct device_d *find_device(const char *str);
+
 /* Find a free device id from the given template. This is archieved by
  * appending a number to the template. Dynamically created devices should
  * use this function rather than filling the id field themselves.
-- 
2.30.2




  parent reply	other threads:[~2022-09-05 17:44 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-05 10:35 [PATCH 0/5] commands: gpio: add controller as optional argument Ahmad Fatoum
2022-09-05 10:35 ` [PATCH 1/5] gpiolib: implement gpio_get_chip_by_dev() Ahmad Fatoum
2022-09-05 10:35 ` [PATCH 2/5] of: platform: optimize of_find_device_by_node when deep probing Ahmad Fatoum
2022-09-05 10:35 ` Ahmad Fatoum [this message]
2022-09-05 10:35 ` [PATCH 4/5] commands: gpio: add -d argument to set/get commands Ahmad Fatoum
2022-09-28 13:37   ` Enrico Scholz
2022-09-28 14:36     ` Sascha Hauer
2022-09-29  9:50     ` Ahmad Fatoum
2022-09-05 10:35 ` [PATCH 5/5] gpiolib: gpioinfo: add optional CONTROLLER command line argument Ahmad Fatoum
2022-09-28 13:22   ` Enrico Scholz
2022-09-28 14:24     ` Sascha Hauer
2022-09-12  9:13 ` [PATCH 0/5] commands: gpio: add controller as optional argument Sascha Hauer

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