xref: /linux/drivers/edac/layerscape_edac.c (revision b50ecc5aca4d18f1f0c4942f5c797bc85edef144)
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 
22 static 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 };
27 MODULE_DEVICE_TABLE(of, fsl_ddr_mc_err_of_match);
28 
29 static struct platform_driver fsl_ddr_mc_err_driver = {
30 	.probe = fsl_mc_err_probe,
31 	.remove_new = 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 
38 static 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 
64 module_init(fsl_ddr_mc_init);
65 
66 static void __exit fsl_ddr_mc_exit(void)
67 {
68 	platform_driver_unregister(&fsl_ddr_mc_err_driver);
69 }
70 
71 module_exit(fsl_ddr_mc_exit);
72 
73 MODULE_DESCRIPTION("Freescale Layerscape EDAC driver");
74 MODULE_LICENSE("GPL");
75 MODULE_AUTHOR("NXP Semiconductor");
76 module_param(edac_op_state, int, 0444);
77 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll, 2=Interrupt");
78