Subject: [PATCH] ARM: OMAP2+: gpmc-smsc911x: only register regulator for first instance

From: [email-masked] (Kevin Hilman)
Date: Tue, 06 Mar 2012 17:39:33 -0800

Tony Lindgren <[email-masked]> writes:

> * Kevin Hilman <[email-masked]> [120306 16:07]:
>> 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 <[email-masked]>
>> Signed-off-by: Kevin Hilman <[email-masked]>
>> ---
>> Fix needed for v3.3.
>> Applies on top of Tony's fixes branch.
>> 
>>  arch/arm/mach-omap2/gpmc-smsc911x.c |   11 +++++++----
>>  1 file changed, 7 insertions(+), 4 deletions(-)
>> 
>> diff --git a/arch/arm/mach-omap2/gpmc-smsc911x.c b/arch/arm/mach-omap2/gpmc-smsc911x.c
>> index bbb870c..4d6f1c6 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) {
>
> Shouldn't this be !gpmc_cfg->id instead..

doh, of course.  Updated patch below.

Kevin

>>From 3c17a6fe6fdcc5e4e33f174c2b0982d71e759cf1 Mon Sep 17 00:00:00 2001
From: Kevin Hilman <[email-masked]>
Date: Thu, 1 Mar 2012 12:30:42 -0800
Subject: [PATCH] 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 <[email-masked]>
Signed-off-by: Kevin Hilman <[email-masked]>
---
 arch/arm/mach-omap2/gpmc-smsc911x.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/gpmc-smsc911x.c b/arch/arm/mach-omap2/gpmc-smsc911x.c
index bbb870c..5e5880d 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) {
-- 
1.7.9.2