linux-kernel - [PATCH v2 8/9] soc: brcmstb: Split initialization

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Date:   Tue, 19 Dec 2017 11:22:46 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     bcm-kernel-feedback-list@...adcom.com
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Brian Norris <computersforpeace@...il.com>,
        Gregory Fong <gregory.0xf0@...il.com>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        linux-arm-kernel@...ts.infradead.org (moderated list:BROADCOM BCM7XXX
        ARM ARCHITECTURE), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 8/9] soc: brcmstb: Split initialization

We may need access to family_id and product_id fairly early on boot for
other parts of the code (e.g: biuctrl.c), so split the initialization
between an early_init() and an arch_initcall() which allows us to do
that.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/soc/bcm/brcmstb/common.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/drivers/soc/bcm/brcmstb/common.c b/drivers/soc/bcm/brcmstb/common.c
index a71730da6385..781ada62d0a3 100644
--- a/drivers/soc/bcm/brcmstb/common.c
+++ b/drivers/soc/bcm/brcmstb/common.c
@@ -66,13 +66,10 @@ static const struct of_device_id sun_top_ctrl_match[] = {
 	{ }
 };
 
-static int __init brcmstb_soc_device_init(void)
+static int __init brcmstb_soc_device_early_init(void)
 {
-	struct soc_device_attribute *soc_dev_attr;
-	struct soc_device *soc_dev;
 	struct device_node *sun_top_ctrl;
 	void __iomem *sun_top_ctrl_base;
-	int ret = 0;
 
 	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
 	if (!sun_top_ctrl)
@@ -84,12 +81,19 @@ static int __init brcmstb_soc_device_init(void)
 
 	family_id = readl(sun_top_ctrl_base);
 	product_id = readl(sun_top_ctrl_base + 0x4);
+	iounmap(sun_top_ctrl_base);
+	return 0;
+}
+early_initcall(brcmstb_soc_device_early_init);
+
+static int __init brcmstb_soc_device_init(void)
+{
+	struct soc_device_attribute *soc_dev_attr;
+	struct soc_device *soc_dev;
 
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
-	if (!soc_dev_attr) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!soc_dev_attr)
+		return -ENOMEM;
 
 	soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
 					 family_id >> 28 ?
@@ -107,14 +111,9 @@ static int __init brcmstb_soc_device_init(void)
 		kfree(soc_dev_attr->soc_id);
 		kfree(soc_dev_attr->revision);
 		kfree(soc_dev_attr);
-		ret = -ENODEV;
-		goto out;
+		return -ENOMEM;
 	}
 
 	return 0;
-
-out:
-	iounmap(sun_top_ctrl_base);
-	return ret;
 }
 arch_initcall(brcmstb_soc_device_init);
-- 
2.9.3