linux-kernel - [RFC 10/12] pwm: Probe PWM chip devices on demand

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Message-Id: <1429886848-5843-11-git-send-email-tomeu.vizoso@collabora.com>
Date:	Fri, 24 Apr 2015 16:47:26 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Stéphane Marchesin <marcheu@...omium.org>,
	Alexander Holler <holler@...oftware.de>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>
Subject: [RFC 10/12] pwm: Probe PWM chip devices on demand

When looking up a PWM chip through its DT node, ensure that the
corresponding device has been registered.
---
 drivers/pwm/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index ba34c7d..31f486c 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -24,6 +24,7 @@
 #include <linux/radix-tree.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
+#include <linux/of_platform.h>
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/device.h>
@@ -479,6 +480,8 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
 {
 	struct pwm_chip *chip;
 
+	of_platform_device_ensure(np);
+
 	mutex_lock(&pwm_lock);
 
 	list_for_each_entry(chip, &pwm_chips, list)
-- 
2.3.6

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