mirror of https://gitee.com/openkylin/linux.git
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* Copyright © 2014 NVIDIA Corporation
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* Copyright © 2015 Broadcom Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/slab.h>
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#include <linux/soc/brcmstb/brcmstb.h>
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#include <linux/sys_soc.h>
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#include <soc/brcmstb/common.h>
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static u32 family_id;
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static u32 product_id;
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static const struct of_device_id brcmstb_machine_match[] = {
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{ .compatible = "brcm,brcmstb", },
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{ }
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};
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bool soc_is_brcmstb(void)
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{
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struct device_node *root;
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root = of_find_node_by_path("/");
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if (!root)
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return false;
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return of_match_node(brcmstb_machine_match, root) != NULL;
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}
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static const struct of_device_id sun_top_ctrl_match[] = {
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{ .compatible = "brcm,brcmstb-sun-top-ctrl", },
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{ }
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};
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static int __init brcmstb_soc_device_init(void)
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{
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struct soc_device_attribute *soc_dev_attr;
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struct soc_device *soc_dev;
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struct device_node *sun_top_ctrl;
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void __iomem *sun_top_ctrl_base;
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int ret = 0;
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sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
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if (!sun_top_ctrl)
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return -ENODEV;
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sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
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if (!sun_top_ctrl_base)
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return -ENODEV;
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family_id = readl(sun_top_ctrl_base);
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product_id = readl(sun_top_ctrl_base + 0x4);
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr) {
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ret = -ENOMEM;
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goto out;
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}
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soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
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family_id >> 28 ?
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family_id >> 16 : family_id >> 8);
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soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
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product_id >> 28 ?
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product_id >> 16 : product_id >> 8);
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soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
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((product_id & 0xf0) >> 4) + 'A',
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product_id & 0xf);
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR(soc_dev)) {
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kfree(soc_dev_attr->family);
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kfree(soc_dev_attr->soc_id);
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kfree(soc_dev_attr->revision);
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kfree(soc_dev_attr);
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ret = -ENODEV;
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goto out;
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}
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return 0;
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out:
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iounmap(sun_top_ctrl_base);
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return ret;
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}
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arch_initcall(brcmstb_soc_device_init);
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