linux-kernel - [PATCH 2/2] pinctrl: mvebu: make pdma clock on dove mandatory

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Date:	Mon, 26 Nov 2012 10:20:34 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Jason Cooper <jason@...edaemon.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Andrew Lunn <andrew@...n.ch>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Axel Lin <axel.lin@...ics.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 2/2] pinctrl: mvebu: make pdma clock on dove mandatory

With the ability to pass clocks through DT, now make the pdma
clock of dove pinctrl mandatory. Otherwise, pinctrl will hang
the system when accessing some registers.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
---
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc: Axel Lin <axel.lin@...ics.com>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Russell King <linux@....linux.org.uk>
Cc: linux-kernel@...r.kernel.org 
Cc: linux-arm-kernel@...ts.infradead.org
---
 drivers/pinctrl/mvebu/pinctrl-dove.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c
index 40c9c3e..90f257d 100644
--- a/drivers/pinctrl/mvebu/pinctrl-dove.c
+++ b/drivers/pinctrl/mvebu/pinctrl-dove.c
@@ -595,8 +595,11 @@ static int __devinit dove_pinctrl_probe(struct platform_device *pdev)
 	 * grab clk to make sure it is ticking.
 	 */
 	clk = devm_clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(clk))
-		clk_prepare_enable(clk);
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "Unable to get pdma clock");
+		return -ENODEV;
+	}
+	clk_prepare_enable(clk);
 
 	return mvebu_pinctrl_probe(pdev);
 }
-- 
1.7.10.4

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