arch/arm/mach-socfpga/l2_cache.c

   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 }