[PATCH] soc: brcmstb: consolidate initcall functions

[justin.chen at broadcom.com]

From: Justin Chen <justin.chen at broadcom.com>

Merge the separate early_initcall and arch_initcall functions into a
single early_initcall. This is possible thanks to commit 6e12db376b60
("base: soc: Allow early registration of a single SoC device"), which
allows soc_device_register() to be called during early_initcall by
deferring the actual registration until the soc_bus is ready.

Replace static family_id/product_id variables with a dynamically
allocated brcmstb_soc_info structure.

Signed-off-by: Justin Chen <justin.chen at broadcom.com>
---
 drivers/soc/bcm/brcmstb/common.c | 88 +++++++++++++++++---------------
 1 file changed, 46 insertions(+), 42 deletions(-)

diff --git a/drivers/soc/bcm/brcmstb/common.c b/drivers/soc/bcm/brcmstb/common.c
index 2da79bd42930..7be0374f5943 100644
--- a/drivers/soc/bcm/brcmstb/common.c
+++ b/drivers/soc/bcm/brcmstb/common.c
@@ -11,18 +11,22 @@
 #include <linux/soc/brcmstb/brcmstb.h>
 #include <linux/sys_soc.h>
 
-static u32 family_id;
-static u32 product_id;
+struct brcmstb_soc_info {
+	u32 family_id;
+	u32 product_id;
+};
+
+static struct brcmstb_soc_info *soc_info;
 
 u32 brcmstb_get_family_id(void)
 {
-	return family_id;
+	return soc_info ? soc_info->family_id : 0;
 }
 EXPORT_SYMBOL(brcmstb_get_family_id);
 
 u32 brcmstb_get_product_id(void)
 {
-	return product_id;
+	return soc_info ? soc_info->product_id : 0;
 }
 EXPORT_SYMBOL(brcmstb_get_product_id);
 
@@ -40,10 +44,12 @@ static const struct of_device_id sun_top_ctrl_match[] = {
 	{ }
 };
 
-static int __init brcmstb_soc_device_early_init(void)
+static int __init brcmstb_soc_device_init(void)
 {
+	struct soc_device_attribute *soc_dev_attr;
 	struct device_node *sun_top_ctrl;
 	void __iomem *sun_top_ctrl_base;
+	struct soc_device *soc_dev;
 	int ret = 0;
 
 	/* We could be on a multi-platform kernel, don't make this fatal but
@@ -51,63 +57,61 @@ static int __init brcmstb_soc_device_early_init(void)
 	 */
 	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
 	if (!sun_top_ctrl)
-		return ret;
+		return 0;
 
 	sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
 	if (!sun_top_ctrl_base) {
 		ret = -ENODEV;
-		goto out;
+		goto out_put_node;
 	}
 
-	family_id = readl(sun_top_ctrl_base);
-	product_id = readl(sun_top_ctrl_base + 0x4);
-	iounmap(sun_top_ctrl_base);
-out:
-	of_node_put(sun_top_ctrl);
-	return ret;
-}
-early_initcall(brcmstb_soc_device_early_init);
-
-static int __init brcmstb_soc_device_init(void)
-{
-	struct soc_device_attribute *soc_dev_attr;
-	struct device_node *sun_top_ctrl;
-	struct soc_device *soc_dev;
-	int ret = 0;
+	soc_info = kzalloc(sizeof(*soc_info), GFP_KERNEL);
+	if (!soc_info) {
+		ret = -ENOMEM;
+		goto out_unmap;
+	}
 
-	/* We could be on a multi-platform kernel, don't make this fatal but
-	 * bail out early
-	 */
-	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
-	if (!sun_top_ctrl)
-		return ret;
+	soc_info->family_id = readl(sun_top_ctrl_base);
+	soc_info->product_id = readl(sun_top_ctrl_base + 0x4);
 
 	soc_dev_attr = kzalloc_obj(*soc_dev_attr);
 	if (!soc_dev_attr) {
 		ret = -ENOMEM;
-		goto out;
+		goto out_free_info;
 	}
 
 	soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
-					 family_id >> 28 ?
-					 family_id >> 16 : family_id >> 8);
+					 soc_info->family_id >> 28 ?
+					 soc_info->family_id >> 16 : soc_info->family_id >> 8);
 	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
-					 product_id >> 28 ?
-					 product_id >> 16 : product_id >> 8);
+					 soc_info->product_id >> 28 ?
+					 soc_info->product_id >> 16 : soc_info->product_id >> 8);
 	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
-					 ((product_id & 0xf0) >> 4) + 'A',
-					   product_id & 0xf);
+					 ((soc_info->product_id & 0xf0) >> 4) + 'A',
+					   soc_info->product_id & 0xf);
 
 	soc_dev = soc_device_register(soc_dev_attr);
 	if (IS_ERR(soc_dev)) {
-		kfree(soc_dev_attr->family);
-		kfree(soc_dev_attr->soc_id);
-		kfree(soc_dev_attr->revision);
-		kfree(soc_dev_attr);
-		ret = -ENOMEM;
+		ret = PTR_ERR(soc_dev);
+		goto out_free_attr;
 	}
-out:
+
+	iounmap(sun_top_ctrl_base);
+	of_node_put(sun_top_ctrl);
+	return 0;
+
+out_free_attr:
+	kfree(soc_dev_attr->revision);
+	kfree(soc_dev_attr->soc_id);
+	kfree(soc_dev_attr->family);
+	kfree(soc_dev_attr);
+out_free_info:
+	kfree(soc_info);
+	soc_info = NULL;
+out_unmap:
+	iounmap(sun_top_ctrl_base);
+out_put_node:
 	of_node_put(sun_top_ctrl);
 	return ret;
 }
-arch_initcall(brcmstb_soc_device_init);
+early_initcall(brcmstb_soc_device_init);
-- 
2.34.1