1 /* 2 * Copyright Altera Corporation (C) 2016. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #include <linux/io.h> 17 #include <linux/of_platform.h> 18 #include <linux/of_address.h> 19 20 void socfpga_init_l2_ecc(void) 21 { 22 struct device_node *np; 23 void __iomem *mapped_l2_edac_addr; 24 25 np = of_find_compatible_node(NULL, NULL, "altr,socfpga-l2-ecc"); 26 if (!np) { 27 pr_err("Unable to find socfpga-l2-ecc in dtb\n"); 28 return; 29 } 30 31 mapped_l2_edac_addr = of_iomap(np, 0); 32 of_node_put(np); 33 if (!mapped_l2_edac_addr) { 34 pr_err("Unable to find L2 ECC mapping in dtb\n"); 35 return; 36 } 37 38 /* Enable ECC */ 39 writel(0x01, mapped_l2_edac_addr); 40 iounmap(mapped_l2_edac_addr); 41 } 42