| /* |
| * Copyright Altera Corporation (C) 2016. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #include <linux/io.h> |
| #include <linux/genalloc.h> |
| #include <linux/module.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| |
| #define ALTR_OCRAM_CLEAR_ECC 0x00000018 |
| #define ALTR_OCRAM_ECC_EN 0x00000019 |
| |
| void socfpga_init_ocram_ecc(void) |
| { |
| struct device_node *np; |
| void __iomem *mapped_ocr_edac_addr; |
| |
| /* Find the OCRAM EDAC device tree node */ |
| np = of_find_compatible_node(NULL, NULL, "altr,socfpga-ocram-ecc"); |
| if (!np) { |
| pr_err("Unable to find socfpga-ocram-ecc\n"); |
| return; |
| } |
| |
| mapped_ocr_edac_addr = of_iomap(np, 0); |
| of_node_put(np); |
| if (!mapped_ocr_edac_addr) { |
| pr_err("Unable to map OCRAM ecc regs.\n"); |
| return; |
| } |
| |
| /* Clear any pending OCRAM ECC interrupts, then enable ECC */ |
| writel(ALTR_OCRAM_CLEAR_ECC, mapped_ocr_edac_addr); |
| writel(ALTR_OCRAM_ECC_EN, mapped_ocr_edac_addr); |
| |
| iounmap(mapped_ocr_edac_addr); |
| } |