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mtd: mpc5121_nfc: don't treat NULL clk as an error

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clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Jamie Iles 2011-01-11 12:43:49 +00:00 committed by David Woodhouse
parent f53fdebcc3
commit 83025c824f
1 changed files with 3 additions and 2 deletions
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5
drivers/mtd/nand/mpc5121_nfc.c
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@ -29,6 +29,7 @@
#include <linux/clk.h>
#include <linux/gfp.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@ -758,9 +759,9 @@ static int __devinit mpc5121_nfc_probe(struct platform_device *op,
/* Enable NFC clock */
prv->clk = clk_get(dev, "nfc_clk");
if (!prv->clk) {
if (IS_ERR(prv->clk)) {
dev_err(dev, "Unable to acquire NFC clock!\n");
retval = -ENODEV;
retval = PTR_ERR(prv->clk);
goto error;
}