linux-kernel - [PATCH 3/5] pinctrl: handle zero found dt pinconfig properties better

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Date:	Fri, 14 Jun 2013 17:43:21 +0200
From:	Heiko Stübner <heiko@...ech.de>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>,
	rob.herring@...xeda.com, devicetree-discuss@...ts.ozlabs.org,
	James Hogan <james.hogan@...tec.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH 3/5] pinctrl: handle zero found dt pinconfig properties better

This adds a shortcut when no valid pinconf properties are found
in the parsed dt node, to set the values immediately and return.

Suggested-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
---
 drivers/pinctrl/pinconf-generic.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index dcf0371..ea9da17 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -208,6 +208,13 @@ int pinconf_generic_parse_dt_config(struct device_node *np,
 		ncfg++;
 	}
 
+	/* no configs found at all */
+	if (ncfg == 0) {
+		*configs = NULL;
+		*nconfigs = 0;
+		return 0;
+	}
+
 	/*
 	 * Now limit the number of configs to the real number of
 	 * found properties.
-- 
1.7.10.4

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