linux-kernel - [PATCH v4 19/22] power-supply: Probe power supplies on demand

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Date:	Mon,  7 Sep 2015 14:23:44 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-kernel@...r.kernel.org
Cc:	Rob Herring <robh+dt@...nel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Mark Brown <broonie@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-arm-kernel@...ts.infradead.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	devicetree@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-acpi@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>, linux-pm@...r.kernel.org
Subject: [PATCH v4 19/22] power-supply: Probe power supplies on demand

When looking up a power supply through its OF node, probe it if it
hasn't already.

The goal is to reduce deferred probes to a minimum, as it makes it very
cumbersome to find out why a device failed to probe, and can introduce
very big delays in when a critical device is probed.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/power/power_supply_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 456987c88baa..80bc89f4ae89 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -19,6 +19,7 @@
 #include <linux/err.h>
 #include <linux/power_supply.h>
 #include <linux/thermal.h>
+#include <linux/of_device.h>
 #include "power_supply.h"
 
 /* exported for the APM Power driver, APM emulation */
@@ -206,6 +207,8 @@ static int power_supply_find_supply_from_node(struct device_node *supply_node)
 {
 	int error;
 
+	of_device_probe(supply_node);
+
 	/*
 	 * class_for_each_device() either returns its own errors or values
 	 * returned by __power_supply_find_supply_from_node().
-- 
2.4.3

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