56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include "cpsw.h"
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#define AM33XX_CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
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#define AM33XX_CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
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int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
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u8 *mac_addr)
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{
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u32 macid_lo;
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u32 macid_hi;
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struct regmap *syscon;
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syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
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if (IS_ERR(syscon)) {
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if (PTR_ERR(syscon) == -ENODEV)
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return 0;
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return PTR_ERR(syscon);
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}
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regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave),
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&macid_lo);
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regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave),
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&macid_hi);
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mac_addr[5] = (macid_lo >> 8) & 0xff;
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mac_addr[4] = macid_lo & 0xff;
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mac_addr[3] = (macid_hi >> 24) & 0xff;
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mac_addr[2] = (macid_hi >> 16) & 0xff;
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mac_addr[1] = (macid_hi >> 8) & 0xff;
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mac_addr[0] = macid_hi & 0xff;
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return 0;
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}
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EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid);
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MODULE_LICENSE("GPL");
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