layerscape_edac.c

 1/*
 2 * Freescale Memory Controller kernel module
 3 *
 4 * Author: York Sun <york.sun@nxp.com>
 5 *
 6 * Copyright 2016 NXP Semiconductor
 7 *
 8 * Derived from mpc85xx_edac.c
 9 * Author: Dave Jiang <djiang@mvista.com>
10 *
11 * 2006-2007 (c) MontaVista Software, Inc. This file is licensed under
12 * the terms of the GNU General Public License version 2. This program
13 * is licensed "as is" without any warranty of any kind, whether express
14 * or implied.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include "edac_module.h"
20#include "fsl_ddr_edac.h"
21
22static const struct of_device_id fsl_ddr_mc_err_of_match[] = {
23	{ .compatible = "fsl,qoriq-memory-controller", },
24	{ .compatible = "nxp,imx9-memory-controller", .data = (void *)TYPE_IMX9, },
25	{},
26};
27MODULE_DEVICE_TABLE(of, fsl_ddr_mc_err_of_match);
28
29static struct platform_driver fsl_ddr_mc_err_driver = {
30	.probe = fsl_mc_err_probe,
31	.remove = fsl_mc_err_remove,
32	.driver = {
33		.name = "fsl_ddr_mc_err",
34		.of_match_table = fsl_ddr_mc_err_of_match,
35	},
36};
37
38static int __init fsl_ddr_mc_init(void)
39{
40	int res;
41
42	if (ghes_get_devices())
43		return -EBUSY;
44
45	/* make sure error reporting method is sane */
46	switch (edac_op_state) {
47	case EDAC_OPSTATE_POLL:
48	case EDAC_OPSTATE_INT:
49		break;
50	default:
51		edac_op_state = EDAC_OPSTATE_INT;
52		break;
53	}
54
55	res = platform_driver_register(&fsl_ddr_mc_err_driver);
56	if (res) {
57		pr_err("MC fails to register\n");
58		return res;
59	}
60
61	return 0;
62}
63
64module_init(fsl_ddr_mc_init);
65
66static void __exit fsl_ddr_mc_exit(void)
67{
68	platform_driver_unregister(&fsl_ddr_mc_err_driver);
69}
70
71module_exit(fsl_ddr_mc_exit);
72
73MODULE_DESCRIPTION("Freescale Layerscape EDAC driver");
74MODULE_LICENSE("GPL");
75MODULE_AUTHOR("NXP Semiconductor");
76module_param(edac_op_state, int, 0444);
77MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll, 2=Interrupt");