Thread (26 messages) 26 messages, 3 authors, 2015-10-17
STALE3893d
Revisions (6)
  1. v2 [diff vs current]
  2. v3 [diff vs current]
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  5. v6 [diff vs current]
  6. v7 current

[PATCH v7 11/20] pwm: Probe PWM chip devices on demand

From: Tomeu Vizoso <hidden>
Date: 2015-09-29 09:14:32
Also in: linux-acpi, linux-arm-kernel, lkml
Subsystem: pwm subsystem, the rest · Maintainers: Uwe Kleine-König, Linus Torvalds

When looking up a PWM chip 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-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
---


 drivers/pwm/core.c | 3 +++
 1 file changed, 3 insertions(+)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 3f9df3ea3350..794a923df0d8 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -29,6 +29,7 @@
 #include <linux/device.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/of_device.h>
 
 #include <dt-bindings/pwm/pwm.h>
 
@@ -516,6 +517,8 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
 {
 	struct pwm_chip *chip;
 
+	of_device_probe(np);
+
 	mutex_lock(&pwm_lock);
 
 	list_for_each_entry(chip, &pwm_chips, list)
-- 
2.4.3

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