linux-kernel - [ 46/46] Revert :can: sja1000: fix handling on dt properties on little endian systems"

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Date:	Mon,  6 May 2013 15:58:52 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>,
	Christoph Fritz <chf.fritz@...glemail.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [ 46/46] Revert :can: sja1000: fix handling on dt properties on little endian systems"

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

This reverts commit 55fe10a686c3a8bce7bddc149e4ebb12f5a18c25 which is
commit 0443de5fbf224abf41f688d8487b0c307dc5a4b4 upstream.

This causes a build breakage on 3.0, so we shouldn't apply it to that
tree.


Reported-by: Jiri Slaby <jslaby@...e.cz>
Cc: Christoph Fritz <chf.fritz@...glemail.com>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/can/sja1000/sja1000_of_platform.c |   31 +++++++++++++-------------
 1 file changed, 16 insertions(+), 15 deletions(-)

--- a/drivers/net/can/sja1000/sja1000_of_platform.c
+++ b/drivers/net/can/sja1000/sja1000_of_platform.c
@@ -93,8 +93,8 @@ static int __devinit sja1000_ofp_probe(s
 	struct net_device *dev;
 	struct sja1000_priv *priv;
 	struct resource res;
-	u32 prop;
-	int err, irq, res_size;
+	const u32 *prop;
+	int err, irq, res_size, prop_size;
 	void __iomem *base;
 
 	err = of_address_to_resource(np, 0, &res);
@@ -135,27 +135,27 @@ static int __devinit sja1000_ofp_probe(s
 	priv->read_reg = sja1000_ofp_read_reg;
 	priv->write_reg = sja1000_ofp_write_reg;
 
-	err = of_property_read_u32(np, "nxp,external-clock-frequency", &prop);
-	if (!err)
-		priv->can.clock.freq = prop / 2;
+	prop = of_get_property(np, "nxp,external-clock-frequency", &prop_size);
+	if (prop && (prop_size ==  sizeof(u32)))
+		priv->can.clock.freq = *prop / 2;
 	else
 		priv->can.clock.freq = SJA1000_OFP_CAN_CLOCK; /* default */
 
-	err = of_property_read_u32(np, "nxp,tx-output-mode", &prop);
-	if (!err)
-		priv->ocr |= prop & OCR_MODE_MASK;
+	prop = of_get_property(np, "nxp,tx-output-mode", &prop_size);
+	if (prop && (prop_size == sizeof(u32)))
+		priv->ocr |= *prop & OCR_MODE_MASK;
 	else
 		priv->ocr |= OCR_MODE_NORMAL; /* default */
 
-	err = of_property_read_u32(np, "nxp,tx-output-config", &prop);
-	if (!err)
-		priv->ocr |= (prop << OCR_TX_SHIFT) & OCR_TX_MASK;
+	prop = of_get_property(np, "nxp,tx-output-config", &prop_size);
+	if (prop && (prop_size == sizeof(u32)))
+		priv->ocr |= (*prop << OCR_TX_SHIFT) & OCR_TX_MASK;
 	else
 		priv->ocr |= OCR_TX0_PULLDOWN; /* default */
 
-	err = of_property_read_u32(np, "nxp,clock-out-frequency", &prop);
-	if (!err && prop) {
-		u32 divider = priv->can.clock.freq * 2 / prop;
+	prop = of_get_property(np, "nxp,clock-out-frequency", &prop_size);
+	if (prop && (prop_size == sizeof(u32)) && *prop) {
+		u32 divider = priv->can.clock.freq * 2 / *prop;
 
 		if (divider > 1)
 			priv->cdr |= divider / 2 - 1;
@@ -165,7 +165,8 @@ static int __devinit sja1000_ofp_probe(s
 		priv->cdr |= CDR_CLK_OFF; /* default */
 	}
 
-	if (!of_property_read_bool(np, "nxp,no-comparator-bypass"))
+	prop = of_get_property(np, "nxp,no-comparator-bypass", NULL);
+	if (!prop)
 		priv->cdr |= CDR_CBP; /* default */
 
 	priv->irq_flags = IRQF_SHARED;


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