1 /* 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. 6 * 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. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/regmap.h> 18 #include <linux/mfd/syscon.h> 19 20 #include "cpsw.h" 21 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) 24 25 int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave, 26 u8 *mac_addr) 27 { 28 u32 macid_lo; 29 u32 macid_hi; 30 struct regmap *syscon; 31 32 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); 33 if (IS_ERR(syscon)) { 34 if (PTR_ERR(syscon) == -ENODEV) 35 return 0; 36 return PTR_ERR(syscon); 37 } 38 39 regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave), 40 &macid_lo); 41 regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave), 42 &macid_hi); 43 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; 50 51 return 0; 52 } 53 EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid); 54 55 MODULE_LICENSE("GPL"); 56