ARM: OMAP2+: gpmc-smsc911x: only register regulator for first instance

commit e4b0b2cbbb (ARM: OMAP2+: gpmc-smsc911x: add required smsc911x
regulators) added regulators which are registered during
gpmc_smsc911x_init().  However, some platforms (OMAP3/Overo) have more
than one instance of the SMSC911x and result in attempting to register
the same regulator more than once which causes a panic().

Fix this by only registering the regulator when the platform_data id
field is zero, indicating its the first instance.

Cc: Matt Porter <mporter@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/arm/mach-omap2/gpmc-smsc911x.c b/arch/arm/mach-omap2/gpmc-smsc911x.c
index bbb870c04a5e..5e5880d6d099 100644
--- a/arch/arm/mach-omap2/gpmc-smsc911x.c
+++ b/arch/arm/mach-omap2/gpmc-smsc911x.c
@@ -101,10 +101,13 @@ void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
 
         gpmc_cfg = board_data;
 
-        ret = platform_device_register(&gpmc_smsc911x_regulator);
-        if (ret < 0) {
-                pr_err("Unable to register smsc911x regulators: %d\n", ret);
-                return;
+        if (!gpmc_cfg->id) {
+                ret = platform_device_register(&gpmc_smsc911x_regulator);
+                if (ret < 0) {
+                        pr_err("Unable to register smsc911x regulators: %d\n",
+                               ret);
+                        return;
+                }
         }
 
         if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {