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

From: Tomeu Vizoso
Date: Mon Sep 07 2015 - 08:28:43 EST

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@xxxxxxxxxxxxx>

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().

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