video, sm501: add OF binding to support SM501

- add binding to OF, compatible name "smi,sm501"

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: linux-fbdev@vger.kernel.org
cc: devicetree-discuss@ozlabs.org
cc: Ben Dooks <ben@simtec.co.uk>
cc: Vincent Sanders <vince@simtec.co.uk>
cc: Samuel Ortiz <sameo@linux.intel.com>
cc: linux-kernel@vger.kernel.org
cc: Randy Dunlap <rdunlap@xenotime.net>
cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 558d5f3f6d02..df3702c1756d 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1377,7 +1377,7 @@ static int __devinit sm501_init_dev(struct sm501_devdata *sm)
                         sm501_register_gpio(sm);
         }
 
-        if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
+        if (pdata && pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
                 if (!sm501_gpio_isregistered(sm))
                         dev_err(sm->dev, "no gpio available for i2c gpio.\n");
                 else
@@ -1422,6 +1422,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
 
         sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
         sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+
         if (sm->io_res == NULL || sm->mem_res == NULL) {
                 dev_err(&dev->dev, "failed to get IO resource\n");
                 ret = -ENOENT;
@@ -1735,10 +1736,16 @@ static struct pci_driver sm501_pci_driver = {
 
 MODULE_ALIAS("platform:sm501");
 
+static struct of_device_id __devinitdata of_sm501_match_tbl[] = {
+        { .compatible = "smi,sm501", },
+        { /* end */ }
+};
+
 static struct platform_driver sm501_plat_driver = {
         .driver         = {
                 .name   = "sm501",
                 .owner  = THIS_MODULE,
+                .of_match_table = of_sm501_match_tbl,
         },
         .probe          = sm501_plat_probe,
         .remove         = sm501_plat_remove,