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From: Sebastian Reichel <sre@debian.org>
To: Sebastian Reichel <sre@ring0.de>,
	Anton Vorontsov <anton@enomsg.org>,
	David Woodhouse <dwmw2@infradead.org>
Cc: "Rob Herring" <rob.herring@calxeda.com>,
	"Pawel Moll" <pawel.moll@arm.com>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Stephen Warren" <swarren@wwwdotorg.org>,
	"Ian Campbell" <ijc+devicetree@hellion.org.uk>,
	"Rob Landley" <rob@landley.net>,
	linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	devicetree@vger.kernel.org, "Pali Rohár" <pali.rohar@gmail.com>,
	freemangordon@abv.bg, aaro.koskinen@iki.fi, pavel@ucw.cz,
	"Sebastian Reichel" <sre@debian.org>
Subject: [PATCH 1/3] power_supply: add power_supply_get_by_phandle
Date: Sun, 24 Nov 2013 17:49:29 +0100	[thread overview]
Message-ID: <1385311771-447-2-git-send-email-sre@debian.org> (raw)
In-Reply-To: <1385311771-447-1-git-send-email-sre@debian.org>

Add method to get power supply by device tree phandle.

Signed-off-by: Sebastian Reichel <sre@debian.org>
---
 drivers/power/power_supply_core.c | 24 ++++++++++++++++++++++++
 include/linux/power_supply.h      |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 08bce22..99e4b41 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -340,6 +340,30 @@ struct power_supply *power_supply_get_by_name(const char *name)
 }
 EXPORT_SYMBOL_GPL(power_supply_get_by_name);
 
+static int power_supply_match_device_node(struct device *dev, const void *data)
+{
+	return dev->parent && dev->parent->of_node == data;
+}
+
+struct power_supply *power_supply_get_by_phandle(struct device_node *np,
+							const char *property)
+{
+	struct device_node *power_supply_np;
+	struct device *dev;
+
+	power_supply_np = of_parse_phandle(np, property, 0);
+	if (!power_supply_np)
+		return ERR_PTR(-ENODEV);
+
+	dev = class_find_device(power_supply_class, NULL, power_supply_np,
+						power_supply_match_device_node);
+
+	of_node_put(power_supply_np);
+
+	return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
+
 int power_supply_powers(struct power_supply *psy, struct device *dev)
 {
 	return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index c6f52c0..4d0e0b4 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -246,6 +246,8 @@ extern struct atomic_notifier_head    power_supply_notifier;
 extern int power_supply_reg_notifier(struct notifier_block *nb);
 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 extern struct power_supply *power_supply_get_by_name(const char *name);
+extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
+							const char *property);
 extern void power_supply_changed(struct power_supply *psy);
 extern int power_supply_am_i_supplied(struct power_supply *psy);
 extern int power_supply_set_battery_charged(struct power_supply *psy);
-- 
1.8.4.3


  reply	other threads:[~2013-11-24 16:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-24 16:49 [PATCH 0/3] DT support for bq2415x Sebastian Reichel
2013-11-24 16:49 ` Sebastian Reichel [this message]
2013-11-25 12:32   ` [PATCH 1/3] power_supply: add power_supply_get_by_phandle Pavel Machek
2013-12-24  2:20   ` Anton Vorontsov
2013-12-24  2:20     ` Anton Vorontsov
2013-12-24  3:37     ` Sebastian Reichel
2013-11-24 16:49 ` [PATCH 2/3] bq2415x_charger: add DT support Sebastian Reichel
2013-11-25 12:39   ` Pavel Machek
2013-11-24 16:49 ` [PATCH 3/3] dt: binding documentation for bq2415x charger Sebastian Reichel
2013-11-25 13:07   ` Pavel Machek
2013-12-24  2:20 ` [PATCH 0/3] DT support for bq2415x Anton Vorontsov
2013-12-24  2:20   ` Anton Vorontsov
2013-12-24  3:39   ` Sebastian Reichel

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