1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/soc/bcm/brcmstb/common.c b/drivers/soc/bcm/brcmstb/common.c
new file mode 100644
index 0000000000..2a010881f4
--- /dev/null
+++ b/drivers/soc/bcm/brcmstb/common.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright © 2014 NVIDIA Corporation
+ * Copyright © 2015 Broadcom Corporation
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/soc/brcmstb/brcmstb.h>
+#include <linux/sys_soc.h>
+
+static u32 family_id;
+static u32 product_id;
+
+u32 brcmstb_get_family_id(void)
+{
+	return family_id;
+}
+EXPORT_SYMBOL(brcmstb_get_family_id);
+
+u32 brcmstb_get_product_id(void)
+{
+	return product_id;
+}
+EXPORT_SYMBOL(brcmstb_get_product_id);
+
+static const struct of_device_id sun_top_ctrl_match[] = {
+	{ .compatible = "brcm,bcm7125-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7346-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7358-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7360-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7362-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7420-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7425-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7429-sun-top-ctrl", },
+	{ .compatible = "brcm,bcm7435-sun-top-ctrl", },
+	{ .compatible = "brcm,brcmstb-sun-top-ctrl", },
+	{ }
+};
+
+static int __init brcmstb_soc_device_early_init(void)
+{
+	struct device_node *sun_top_ctrl;
+	void __iomem *sun_top_ctrl_base;
+	int ret = 0;
+
+	/* 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;
+
+	sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
+	if (!sun_top_ctrl_base) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	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;
+
+	/* 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_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
+					 family_id >> 28 ?
+					 family_id >> 16 : family_id >> 8);
+	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
+					 product_id >> 28 ?
+					 product_id >> 16 : product_id >> 8);
+	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
+					 ((product_id & 0xf0) >> 4) + 'A',
+					   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;
+	}
+out:
+	of_node_put(sun_top_ctrl);
+	return ret;
+}
+arch_initcall(brcmstb_soc_device_init);