common.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright © 2014 NVIDIA Corporation
  4 * Copyright © 2015 Broadcom Corporation
  5 */
  6
  7#include <linux/io.h>
  8#include <linux/of.h>
  9#include <linux/of_address.h>
 10#include <linux/slab.h>
 11#include <linux/soc/brcmstb/brcmstb.h>
 12#include <linux/sys_soc.h>
 13
 14static u32 family_id;
 15static u32 product_id;
 16
 17u32 brcmstb_get_family_id(void)
 18{
 19	return family_id;
 20}
 21EXPORT_SYMBOL(brcmstb_get_family_id);
 22
 23u32 brcmstb_get_product_id(void)
 24{
 25	return product_id;
 26}
 27EXPORT_SYMBOL(brcmstb_get_product_id);
 28
 29static const struct of_device_id sun_top_ctrl_match[] = {
 30	{ .compatible = "brcm,bcm7125-sun-top-ctrl", },
 31	{ .compatible = "brcm,bcm7346-sun-top-ctrl", },
 32	{ .compatible = "brcm,bcm7358-sun-top-ctrl", },
 33	{ .compatible = "brcm,bcm7360-sun-top-ctrl", },
 34	{ .compatible = "brcm,bcm7362-sun-top-ctrl", },
 35	{ .compatible = "brcm,bcm7420-sun-top-ctrl", },
 36	{ .compatible = "brcm,bcm7425-sun-top-ctrl", },
 37	{ .compatible = "brcm,bcm7429-sun-top-ctrl", },
 38	{ .compatible = "brcm,bcm7435-sun-top-ctrl", },
 39	{ .compatible = "brcm,brcmstb-sun-top-ctrl", },
 40	{ }
 41};
 42
 43static int __init brcmstb_soc_device_early_init(void)
 44{
 45	struct device_node *sun_top_ctrl;
 46	void __iomem *sun_top_ctrl_base;
 47	int ret = 0;
 48
 49	/* We could be on a multi-platform kernel, don't make this fatal but
 50	 * bail out early
 51	 */
 52	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
 53	if (!sun_top_ctrl)
 54		return ret;
 55
 56	sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
 57	if (!sun_top_ctrl_base) {
 58		ret = -ENODEV;
 59		goto out;
 60	}
 61
 62	family_id = readl(sun_top_ctrl_base);
 63	product_id = readl(sun_top_ctrl_base + 0x4);
 64	iounmap(sun_top_ctrl_base);
 65out:
 66	of_node_put(sun_top_ctrl);
 67	return ret;
 68}
 69early_initcall(brcmstb_soc_device_early_init);
 70
 71static int __init brcmstb_soc_device_init(void)
 72{
 73	struct soc_device_attribute *soc_dev_attr;
 74	struct device_node *sun_top_ctrl;
 75	struct soc_device *soc_dev;
 76	int ret = 0;
 77
 78	/* We could be on a multi-platform kernel, don't make this fatal but
 79	 * bail out early
 80	 */
 81	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
 82	if (!sun_top_ctrl)
 83		return ret;
 84
 85	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 86	if (!soc_dev_attr) {
 87		ret = -ENOMEM;
 88		goto out;
 89	}
 90
 91	soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
 92					 family_id >> 28 ?
 93					 family_id >> 16 : family_id >> 8);
 94	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
 95					 product_id >> 28 ?
 96					 product_id >> 16 : product_id >> 8);
 97	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
 98					 ((product_id & 0xf0) >> 4) + 'A',
 99					   product_id & 0xf);
100
101	soc_dev = soc_device_register(soc_dev_attr);
102	if (IS_ERR(soc_dev)) {
103		kfree(soc_dev_attr->family);
104		kfree(soc_dev_attr->soc_id);
105		kfree(soc_dev_attr->revision);
106		kfree(soc_dev_attr);
107		ret = -ENOMEM;
108	}
109out:
110	of_node_put(sun_top_ctrl);
111	return ret;
112}
113arch_initcall(brcmstb_soc_device_init);