2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
13 #include <linux/kernel.h>
14 #include <linux/module.h>
16 #include <linux/of_device.h>
17 #include <linux/regmap.h>
18 #include <linux/mfd/syscon.h>
22 #define AM33XX_CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
23 #define AM33XX_CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
25 int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
30 struct regmap *syscon;
32 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
34 if (PTR_ERR(syscon) == -ENODEV)
36 return PTR_ERR(syscon);
39 regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave),
41 regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave),
44 mac_addr[5] = (macid_lo >> 8) & 0xff;
45 mac_addr[4] = macid_lo & 0xff;
46 mac_addr[3] = (macid_hi >> 24) & 0xff;
47 mac_addr[2] = (macid_hi >> 16) & 0xff;
48 mac_addr[1] = (macid_hi >> 8) & 0xff;
49 mac_addr[0] = macid_hi & 0xff;
53 EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid);
55 MODULE_LICENSE("GPL");