linux-kernel - [PATCH 2/3] regulator: tps65910: dt: support when "regulators" node found

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Date:	Sun, 20 May 2012 21:48:49 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<lrg@...com>, <broonie@...nsource.wolfsonmicro.com>
CC:	<linux-kernel@...r.kernel.org>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH 2/3] regulator: tps65910: dt: support when "regulators" node found

The device tree binding for the tps65910 is described as:
	tps65911 {
		reg = <0x2d>
		:::::::::
		regulators {
			compatible = "ti,tps65911";
			ldo1_reg: ldo1 {
				/** regulator entry */
			};

			ldo2_reg: ldo2 {
				/** regulator entry */
			};
			::::::::::
		};
	};

Support the regulators functionality only when there is "regulators"
child node available for tps65910.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
 drivers/regulator/tps65910-regulator.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c
index 94c1801..0190f29 100644
--- a/drivers/regulator/tps65910-regulator.c
+++ b/drivers/regulator/tps65910-regulator.c
@@ -1090,6 +1090,10 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
 	}
 
 	regulators = of_find_node_by_name(np, "regulators");
+	if (!regulators) {
+		dev_err(&pdev->dev, "regulator node not found\n");
+		return NULL;
+	}
 
 	switch (tps65910_chip_id(tps65910)) {
 	case TPS65910:
-- 
1.7.1.1

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