drivers/edac/octeon_edac-lmc.c - arm/linux - Git at Google

 /*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * Copyright (C) 2009 Wind River Systems,
  *   written by Ralf Baechle <ralf@linux-mips.org>
  *
  * Copyright (c) 2013 by Cisco Systems, Inc.
  * All rights reserved.
  */
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/edac.h>
 #include <linux/ctype.h>

 #include <asm/octeon/octeon.h>
 #include <asm/octeon/cvmx-lmcx-defs.h>

 #include "edac_module.h"

 #define OCTEON_MAX_MC 4

 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)

 struct octeon_lmc_pvt {
 	unsigned long inject;
 	unsigned long error_type;
 	unsigned long dimm;
 	unsigned long rank;
 	unsigned long bank;
 	unsigned long row;
 	unsigned long col;
 };

 static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
 {
 	union cvmx_lmcx_mem_cfg0 cfg0;
 	bool do_clear = false;
 	char msg[64];

 	cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
 	if (cfg0.s.sec_err || cfg0.s.ded_err) {
 		union cvmx_lmcx_fadr fadr;
 		fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
 		snprintf(msg, sizeof(msg),
 			 "DIMM %d rank %d bank %d row %d col %d",
 			 fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
 			 fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
 	}

 	if (cfg0.s.sec_err) {
 		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
 				     -1, -1, -1, msg, "");
 		cfg0.s.sec_err = -1;	/* Done, re-arm */
 		do_clear = true;
 	}

 	if (cfg0.s.ded_err) {
 		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
 				     -1, -1, -1, msg, "");
 		cfg0.s.ded_err = -1;	/* Done, re-arm */
 		do_clear = true;
 	}
 	if (do_clear)
 		cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
 }

 static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
 {
 	struct octeon_lmc_pvt *pvt = mci->pvt_info;
 	union cvmx_lmcx_int int_reg;
 	bool do_clear = false;
 	char msg[64];

 	if (!pvt->inject)
 		int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
 	else {
 		if (pvt->error_type == 1)
 			int_reg.s.sec_err = 1;
 		if (pvt->error_type == 2)
 			int_reg.s.ded_err = 1;
 	}

 	if (int_reg.s.sec_err || int_reg.s.ded_err) {
 		union cvmx_lmcx_fadr fadr;
 		if (likely(!pvt->inject))
 			fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
 		else {
 			fadr.cn61xx.fdimm = pvt->dimm;
 			fadr.cn61xx.fbunk = pvt->rank;
 			fadr.cn61xx.fbank = pvt->bank;
 			fadr.cn61xx.frow = pvt->row;
 			fadr.cn61xx.fcol = pvt->col;
 		}
 		snprintf(msg, sizeof(msg),
 			 "DIMM %d rank %d bank %d row %d col %d",
 			 fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
 			 fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
 	}

 	if (int_reg.s.sec_err) {
 		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
 				     -1, -1, -1, msg, "");
 		int_reg.s.sec_err = -1;	/* Done, re-arm */
 		do_clear = true;
 	}

 	if (int_reg.s.ded_err) {
 		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
 				     -1, -1, -1, msg, "");
 		int_reg.s.ded_err = -1;	/* Done, re-arm */
 		do_clear = true;
 	}

 	if (do_clear) {
 		if (likely(!pvt->inject))
 			cvmx_write_csr(CVMX_LMCX_INT(mci->mc_idx), int_reg.u64);
 		else
 			pvt->inject = 0;
 	}
 }

 /************************ MC SYSFS parts ***********************************/

 /* Only a couple naming differences per template, so very similar */
 #define TEMPLATE_SHOW(reg)						\
 static ssize_t octeon_mc_inject_##reg##_show(struct device *dev,	\
 			       struct device_attribute *attr,		\
 			       char *data)				\
 {									\
 	struct mem_ctl_info *mci = to_mci(dev);				\
 	struct octeon_lmc_pvt *pvt = mci->pvt_info;			\
 	return sprintf(data, "%016llu\n", (u64)pvt->reg);		\
 }

 #define TEMPLATE_STORE(reg)						\
 static ssize_t octeon_mc_inject_##reg##_store(struct device *dev,	\
 			       struct device_attribute *attr,		\
 			       const char *data, size_t count)		\
 {									\
 	struct mem_ctl_info *mci = to_mci(dev);				\
 	struct octeon_lmc_pvt *pvt = mci->pvt_info;			\
 	if (isdigit(*data)) {						\
 		if (!kstrtoul(data, 0, &pvt->reg))			\
 			return count;					\
 	}								\
 	return 0;							\
 }

 TEMPLATE_SHOW(inject);
 TEMPLATE_STORE(inject);
 TEMPLATE_SHOW(dimm);
 TEMPLATE_STORE(dimm);
 TEMPLATE_SHOW(bank);
 TEMPLATE_STORE(bank);
 TEMPLATE_SHOW(rank);
 TEMPLATE_STORE(rank);
 TEMPLATE_SHOW(row);
 TEMPLATE_STORE(row);
 TEMPLATE_SHOW(col);
 TEMPLATE_STORE(col);

 static ssize_t octeon_mc_inject_error_type_store(struct device *dev,
 					  struct device_attribute *attr,
 					  const char *data,
 					  size_t count)
 {
 	struct mem_ctl_info *mci = to_mci(dev);
 	struct octeon_lmc_pvt *pvt = mci->pvt_info;

 	if (!strncmp(data, "single", 6))
 		pvt->error_type = 1;
 	else if (!strncmp(data, "double", 6))
 		pvt->error_type = 2;

 	return count;
 }

 static ssize_t octeon_mc_inject_error_type_show(struct device *dev,
 					 struct device_attribute *attr,
 					 char *data)
 {
 	struct mem_ctl_info *mci = to_mci(dev);
 	struct octeon_lmc_pvt *pvt = mci->pvt_info;
 	if (pvt->error_type == 1)
 		return sprintf(data, "single");
 	else if (pvt->error_type == 2)
 		return sprintf(data, "double");

 	return 0;
 }

 static DEVICE_ATTR(inject, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_inject_show, octeon_mc_inject_inject_store);
 static DEVICE_ATTR(error_type, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_error_type_show, octeon_mc_inject_error_type_store);
 static DEVICE_ATTR(dimm, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_dimm_show, octeon_mc_inject_dimm_store);
 static DEVICE_ATTR(rank, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_rank_show, octeon_mc_inject_rank_store);
 static DEVICE_ATTR(bank, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_bank_show, octeon_mc_inject_bank_store);
 static DEVICE_ATTR(row, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_row_show, octeon_mc_inject_row_store);
 static DEVICE_ATTR(col, S_IRUGO | S_IWUSR,
 		   octeon_mc_inject_col_show, octeon_mc_inject_col_store);

 static struct attribute *octeon_dev_attrs[] = {
 	&dev_attr_inject.attr,
 	&dev_attr_error_type.attr,
 	&dev_attr_dimm.attr,
 	&dev_attr_rank.attr,
 	&dev_attr_bank.attr,
 	&dev_attr_row.attr,
 	&dev_attr_col.attr,
 	NULL
 };

 ATTRIBUTE_GROUPS(octeon_dev);

 static int octeon_lmc_edac_probe(struct platform_device *pdev)
 {
 	struct mem_ctl_info *mci;
 	struct edac_mc_layer layers[1];
 	int mc = pdev->id;

 	opstate_init();

 	layers[0].type = EDAC_MC_LAYER_CHANNEL;
 	layers[0].size = 1;
 	layers[0].is_virt_csrow = false;

 	if (OCTEON_IS_OCTEON1PLUS()) {
 		union cvmx_lmcx_mem_cfg0 cfg0;

 		cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(0));
 		if (!cfg0.s.ecc_ena) {
 			dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 			return 0;
 		}

 		mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
 		if (!mci)
 			return -ENXIO;

 		mci->pdev = &pdev->dev;
 		mci->dev_name = dev_name(&pdev->dev);

 		mci->mod_name = "octeon-lmc";
 		mci->ctl_name = "octeon-lmc-err";
 		mci->edac_check = octeon_lmc_edac_poll;

 		if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
 			dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 			edac_mc_free(mci);
 			return -ENXIO;
 		}

 		cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 		cfg0.s.intr_ded_ena = 0;	/* We poll */
 		cfg0.s.intr_sec_ena = 0;
 		cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), cfg0.u64);
 	} else {
 		/* OCTEON II */
 		union cvmx_lmcx_int_en en;
 		union cvmx_lmcx_config config;

 		config.u64 = cvmx_read_csr(CVMX_LMCX_CONFIG(0));
 		if (!config.s.ecc_ena) {
 			dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 			return 0;
 		}

 		mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
 		if (!mci)
 			return -ENXIO;

 		mci->pdev = &pdev->dev;
 		mci->dev_name = dev_name(&pdev->dev);

 		mci->mod_name = "octeon-lmc";
 		mci->ctl_name = "co_lmc_err";
 		mci->edac_check = octeon_lmc_edac_poll_o2;

 		if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
 			dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 			edac_mc_free(mci);
 			return -ENXIO;
 		}

 		en.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 		en.s.intr_ded_ena = 0;	/* We poll */
 		en.s.intr_sec_ena = 0;
 		cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), en.u64);
 	}
 	platform_set_drvdata(pdev, mci);

 	return 0;
 }

 static int octeon_lmc_edac_remove(struct platform_device *pdev)
 {
 	struct mem_ctl_info *mci = platform_get_drvdata(pdev);

 	edac_mc_del_mc(&pdev->dev);
 	edac_mc_free(mci);
 	return 0;
 }

 static struct platform_driver octeon_lmc_edac_driver = {
 	.probe = octeon_lmc_edac_probe,
 	.remove = octeon_lmc_edac_remove,
 	.driver = {
 		   .name = "octeon_lmc_edac",
 	}
 };
 module_platform_driver(octeon_lmc_edac_driver);

 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
	/*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*
	* Copyright (C) 2009 Wind River Systems,
	* written by Ralf Baechle <ralf@linux-mips.org>
	*
	* Copyright (c) 2013 by Cisco Systems, Inc.
	* All rights reserved.
	*/
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/io.h>
	#include <linux/edac.h>
	#include <linux/ctype.h>

	#include <asm/octeon/octeon.h>
	#include <asm/octeon/cvmx-lmcx-defs.h>

	#include "edac_module.h"

	#define OCTEON_MAX_MC 4

	#define to_mci(k) container_of(k, struct mem_ctl_info, dev)

	struct octeon_lmc_pvt {
	unsigned long inject;
	unsigned long error_type;
	unsigned long dimm;
	unsigned long rank;
	unsigned long bank;
	unsigned long row;
	unsigned long col;
	};

	static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
	{
	union cvmx_lmcx_mem_cfg0 cfg0;
	bool do_clear = false;
	char msg[64];

	cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
	if (cfg0.s.sec_err \|\| cfg0.s.ded_err) {
	union cvmx_lmcx_fadr fadr;
	fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
	snprintf(msg, sizeof(msg),
	"DIMM %d rank %d bank %d row %d col %d",
	fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
	fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
	}

	if (cfg0.s.sec_err) {
	edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
	-1, -1, -1, msg, "");
	cfg0.s.sec_err = -1; /* Done, re-arm */
	do_clear = true;
	}

	if (cfg0.s.ded_err) {
	edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
	-1, -1, -1, msg, "");
	cfg0.s.ded_err = -1; /* Done, re-arm */
	do_clear = true;
	}
	if (do_clear)
	cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
	}

	static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
	{
	struct octeon_lmc_pvt *pvt = mci->pvt_info;
	union cvmx_lmcx_int int_reg;
	bool do_clear = false;
	char msg[64];

	if (!pvt->inject)
	int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
	else {
	if (pvt->error_type == 1)
	int_reg.s.sec_err = 1;
	if (pvt->error_type == 2)
	int_reg.s.ded_err = 1;
	}

	if (int_reg.s.sec_err \|\| int_reg.s.ded_err) {
	union cvmx_lmcx_fadr fadr;
	if (likely(!pvt->inject))
	fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
	else {
	fadr.cn61xx.fdimm = pvt->dimm;
	fadr.cn61xx.fbunk = pvt->rank;
	fadr.cn61xx.fbank = pvt->bank;
	fadr.cn61xx.frow = pvt->row;
	fadr.cn61xx.fcol = pvt->col;
	}
	snprintf(msg, sizeof(msg),
	"DIMM %d rank %d bank %d row %d col %d",
	fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
	fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
	}

	if (int_reg.s.sec_err) {
	edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
	-1, -1, -1, msg, "");
	int_reg.s.sec_err = -1; /* Done, re-arm */
	do_clear = true;
	}

	if (int_reg.s.ded_err) {
	edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
	-1, -1, -1, msg, "");
	int_reg.s.ded_err = -1; /* Done, re-arm */
	do_clear = true;
	}

	if (do_clear) {
	if (likely(!pvt->inject))
	cvmx_write_csr(CVMX_LMCX_INT(mci->mc_idx), int_reg.u64);
	else
	pvt->inject = 0;
	}
	}

	/********************** MC SYSFS parts *********************************/

	/* Only a couple naming differences per template, so very similar */
	#define TEMPLATE_SHOW(reg) \
	static ssize_t octeon_mc_inject_##reg##_show(struct device *dev, \
	struct device_attribute *attr, \
	char *data) \
	{ \
	struct mem_ctl_info *mci = to_mci(dev); \
	struct octeon_lmc_pvt *pvt = mci->pvt_info; \
	return sprintf(data, "%016llu\n", (u64)pvt->reg); \
	}

	#define TEMPLATE_STORE(reg) \
	static ssize_t octeon_mc_inject_##reg##_store(struct device *dev, \
	struct device_attribute *attr, \
	const char *data, size_t count) \
	{ \
	struct mem_ctl_info *mci = to_mci(dev); \
	struct octeon_lmc_pvt *pvt = mci->pvt_info; \
	if (isdigit(*data)) { \
	if (!kstrtoul(data, 0, &pvt->reg)) \
	return count; \
	} \
	return 0; \
	}

	TEMPLATE_SHOW(inject);
	TEMPLATE_STORE(inject);
	TEMPLATE_SHOW(dimm);
	TEMPLATE_STORE(dimm);
	TEMPLATE_SHOW(bank);
	TEMPLATE_STORE(bank);
	TEMPLATE_SHOW(rank);
	TEMPLATE_STORE(rank);
	TEMPLATE_SHOW(row);
	TEMPLATE_STORE(row);
	TEMPLATE_SHOW(col);
	TEMPLATE_STORE(col);

	static ssize_t octeon_mc_inject_error_type_store(struct device *dev,
	struct device_attribute *attr,
	const char *data,
	size_t count)
	{
	struct mem_ctl_info *mci = to_mci(dev);
	struct octeon_lmc_pvt *pvt = mci->pvt_info;

	if (!strncmp(data, "single", 6))
	pvt->error_type = 1;
	else if (!strncmp(data, "double", 6))
	pvt->error_type = 2;

	return count;
	}

	static ssize_t octeon_mc_inject_error_type_show(struct device *dev,
	struct device_attribute *attr,
	char *data)
	{
	struct mem_ctl_info *mci = to_mci(dev);
	struct octeon_lmc_pvt *pvt = mci->pvt_info;
	if (pvt->error_type == 1)
	return sprintf(data, "single");
	else if (pvt->error_type == 2)
	return sprintf(data, "double");

	return 0;
	}

	static DEVICE_ATTR(inject, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_inject_show, octeon_mc_inject_inject_store);
	static DEVICE_ATTR(error_type, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_error_type_show, octeon_mc_inject_error_type_store);
	static DEVICE_ATTR(dimm, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_dimm_show, octeon_mc_inject_dimm_store);
	static DEVICE_ATTR(rank, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_rank_show, octeon_mc_inject_rank_store);
	static DEVICE_ATTR(bank, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_bank_show, octeon_mc_inject_bank_store);
	static DEVICE_ATTR(row, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_row_show, octeon_mc_inject_row_store);
	static DEVICE_ATTR(col, S_IRUGO \| S_IWUSR,
	octeon_mc_inject_col_show, octeon_mc_inject_col_store);

	static struct attribute *octeon_dev_attrs[] = {
	&dev_attr_inject.attr,
	&dev_attr_error_type.attr,
	&dev_attr_dimm.attr,
	&dev_attr_rank.attr,
	&dev_attr_bank.attr,
	&dev_attr_row.attr,
	&dev_attr_col.attr,
	NULL
	};

	ATTRIBUTE_GROUPS(octeon_dev);

	static int octeon_lmc_edac_probe(struct platform_device *pdev)
	{
	struct mem_ctl_info *mci;
	struct edac_mc_layer layers[1];
	int mc = pdev->id;

	opstate_init();

	layers[0].type = EDAC_MC_LAYER_CHANNEL;
	layers[0].size = 1;
	layers[0].is_virt_csrow = false;

	if (OCTEON_IS_OCTEON1PLUS()) {
	union cvmx_lmcx_mem_cfg0 cfg0;

	cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(0));
	if (!cfg0.s.ecc_ena) {
	dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
	return 0;
	}

	mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
	if (!mci)
	return -ENXIO;

	mci->pdev = &pdev->dev;
	mci->dev_name = dev_name(&pdev->dev);

	mci->mod_name = "octeon-lmc";
	mci->ctl_name = "octeon-lmc-err";
	mci->edac_check = octeon_lmc_edac_poll;

	if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
	dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
	edac_mc_free(mci);
	return -ENXIO;
	}

	cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
	cfg0.s.intr_ded_ena = 0; /* We poll */
	cfg0.s.intr_sec_ena = 0;
	cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), cfg0.u64);
	} else {
	/* OCTEON II */
	union cvmx_lmcx_int_en en;
	union cvmx_lmcx_config config;

	config.u64 = cvmx_read_csr(CVMX_LMCX_CONFIG(0));
	if (!config.s.ecc_ena) {
	dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
	return 0;
	}

	mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
	if (!mci)
	return -ENXIO;

	mci->pdev = &pdev->dev;
	mci->dev_name = dev_name(&pdev->dev);

	mci->mod_name = "octeon-lmc";
	mci->ctl_name = "co_lmc_err";
	mci->edac_check = octeon_lmc_edac_poll_o2;

	if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
	dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
	edac_mc_free(mci);
	return -ENXIO;
	}

	en.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
	en.s.intr_ded_ena = 0; /* We poll */
	en.s.intr_sec_ena = 0;
	cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), en.u64);
	}
	platform_set_drvdata(pdev, mci);

	return 0;
	}

	static int octeon_lmc_edac_remove(struct platform_device *pdev)
	{
	struct mem_ctl_info *mci = platform_get_drvdata(pdev);

	edac_mc_del_mc(&pdev->dev);
	edac_mc_free(mci);
	return 0;
	}

	static struct platform_driver octeon_lmc_edac_driver = {
	.probe = octeon_lmc_edac_probe,
	.remove = octeon_lmc_edac_remove,
	.driver = {
	.name = "octeon_lmc_edac",
	}
	};
	module_platform_driver(octeon_lmc_edac_driver);

	MODULE_LICENSE("GPL");
	MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");