mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Axel Lin](/assets/img/avatar_default.png)
Remove extra space after the "platform:" prefix and make the alias matches driver name. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
578 lines
16 KiB
C
578 lines
16 KiB
C
/*
|
|
* Error Location Module
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that 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.
|
|
*
|
|
*/
|
|
|
|
#define DRIVER_NAME "omap-elm"
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/platform_data/elm.h>
|
|
|
|
#define ELM_SYSCONFIG 0x010
|
|
#define ELM_IRQSTATUS 0x018
|
|
#define ELM_IRQENABLE 0x01c
|
|
#define ELM_LOCATION_CONFIG 0x020
|
|
#define ELM_PAGE_CTRL 0x080
|
|
#define ELM_SYNDROME_FRAGMENT_0 0x400
|
|
#define ELM_SYNDROME_FRAGMENT_1 0x404
|
|
#define ELM_SYNDROME_FRAGMENT_2 0x408
|
|
#define ELM_SYNDROME_FRAGMENT_3 0x40c
|
|
#define ELM_SYNDROME_FRAGMENT_4 0x410
|
|
#define ELM_SYNDROME_FRAGMENT_5 0x414
|
|
#define ELM_SYNDROME_FRAGMENT_6 0x418
|
|
#define ELM_LOCATION_STATUS 0x800
|
|
#define ELM_ERROR_LOCATION_0 0x880
|
|
|
|
/* ELM Interrupt Status Register */
|
|
#define INTR_STATUS_PAGE_VALID BIT(8)
|
|
|
|
/* ELM Interrupt Enable Register */
|
|
#define INTR_EN_PAGE_MASK BIT(8)
|
|
|
|
/* ELM Location Configuration Register */
|
|
#define ECC_BCH_LEVEL_MASK 0x3
|
|
|
|
/* ELM syndrome */
|
|
#define ELM_SYNDROME_VALID BIT(16)
|
|
|
|
/* ELM_LOCATION_STATUS Register */
|
|
#define ECC_CORRECTABLE_MASK BIT(8)
|
|
#define ECC_NB_ERRORS_MASK 0x1f
|
|
|
|
/* ELM_ERROR_LOCATION_0-15 Registers */
|
|
#define ECC_ERROR_LOCATION_MASK 0x1fff
|
|
|
|
#define ELM_ECC_SIZE 0x7ff
|
|
|
|
#define SYNDROME_FRAGMENT_REG_SIZE 0x40
|
|
#define ERROR_LOCATION_SIZE 0x100
|
|
|
|
struct elm_registers {
|
|
u32 elm_irqenable;
|
|
u32 elm_sysconfig;
|
|
u32 elm_location_config;
|
|
u32 elm_page_ctrl;
|
|
u32 elm_syndrome_fragment_6[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_5[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_4[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_3[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_2[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_1[ERROR_VECTOR_MAX];
|
|
u32 elm_syndrome_fragment_0[ERROR_VECTOR_MAX];
|
|
};
|
|
|
|
struct elm_info {
|
|
struct device *dev;
|
|
void __iomem *elm_base;
|
|
struct completion elm_completion;
|
|
struct list_head list;
|
|
enum bch_ecc bch_type;
|
|
struct elm_registers elm_regs;
|
|
int ecc_steps;
|
|
int ecc_syndrome_size;
|
|
};
|
|
|
|
static LIST_HEAD(elm_devices);
|
|
|
|
static void elm_write_reg(struct elm_info *info, int offset, u32 val)
|
|
{
|
|
writel(val, info->elm_base + offset);
|
|
}
|
|
|
|
static u32 elm_read_reg(struct elm_info *info, int offset)
|
|
{
|
|
return readl(info->elm_base + offset);
|
|
}
|
|
|
|
/**
|
|
* elm_config - Configure ELM module
|
|
* @dev: ELM device
|
|
* @bch_type: Type of BCH ecc
|
|
*/
|
|
int elm_config(struct device *dev, enum bch_ecc bch_type,
|
|
int ecc_steps, int ecc_step_size, int ecc_syndrome_size)
|
|
{
|
|
u32 reg_val;
|
|
struct elm_info *info = dev_get_drvdata(dev);
|
|
|
|
if (!info) {
|
|
dev_err(dev, "Unable to configure elm - device not probed?\n");
|
|
return -EPROBE_DEFER;
|
|
}
|
|
/* ELM cannot detect ECC errors for chunks > 1KB */
|
|
if (ecc_step_size > ((ELM_ECC_SIZE + 1) / 2)) {
|
|
dev_err(dev, "unsupported config ecc-size=%d\n", ecc_step_size);
|
|
return -EINVAL;
|
|
}
|
|
/* ELM support 8 error syndrome process */
|
|
if (ecc_steps > ERROR_VECTOR_MAX) {
|
|
dev_err(dev, "unsupported config ecc-step=%d\n", ecc_steps);
|
|
return -EINVAL;
|
|
}
|
|
|
|
reg_val = (bch_type & ECC_BCH_LEVEL_MASK) | (ELM_ECC_SIZE << 16);
|
|
elm_write_reg(info, ELM_LOCATION_CONFIG, reg_val);
|
|
info->bch_type = bch_type;
|
|
info->ecc_steps = ecc_steps;
|
|
info->ecc_syndrome_size = ecc_syndrome_size;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(elm_config);
|
|
|
|
/**
|
|
* elm_configure_page_mode - Enable/Disable page mode
|
|
* @info: elm info
|
|
* @index: index number of syndrome fragment vector
|
|
* @enable: enable/disable flag for page mode
|
|
*
|
|
* Enable page mode for syndrome fragment index
|
|
*/
|
|
static void elm_configure_page_mode(struct elm_info *info, int index,
|
|
bool enable)
|
|
{
|
|
u32 reg_val;
|
|
|
|
reg_val = elm_read_reg(info, ELM_PAGE_CTRL);
|
|
if (enable)
|
|
reg_val |= BIT(index); /* enable page mode */
|
|
else
|
|
reg_val &= ~BIT(index); /* disable page mode */
|
|
|
|
elm_write_reg(info, ELM_PAGE_CTRL, reg_val);
|
|
}
|
|
|
|
/**
|
|
* elm_load_syndrome - Load ELM syndrome reg
|
|
* @info: elm info
|
|
* @err_vec: elm error vectors
|
|
* @ecc: buffer with calculated ecc
|
|
*
|
|
* Load syndrome fragment registers with calculated ecc in reverse order.
|
|
*/
|
|
static void elm_load_syndrome(struct elm_info *info,
|
|
struct elm_errorvec *err_vec, u8 *ecc)
|
|
{
|
|
int i, offset;
|
|
u32 val;
|
|
|
|
for (i = 0; i < info->ecc_steps; i++) {
|
|
|
|
/* Check error reported */
|
|
if (err_vec[i].error_reported) {
|
|
elm_configure_page_mode(info, i, true);
|
|
offset = ELM_SYNDROME_FRAGMENT_0 +
|
|
SYNDROME_FRAGMENT_REG_SIZE * i;
|
|
switch (info->bch_type) {
|
|
case BCH8_ECC:
|
|
/* syndrome fragment 0 = ecc[9-12B] */
|
|
val = cpu_to_be32(*(u32 *) &ecc[9]);
|
|
elm_write_reg(info, offset, val);
|
|
|
|
/* syndrome fragment 1 = ecc[5-8B] */
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[5]);
|
|
elm_write_reg(info, offset, val);
|
|
|
|
/* syndrome fragment 2 = ecc[1-4B] */
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[1]);
|
|
elm_write_reg(info, offset, val);
|
|
|
|
/* syndrome fragment 3 = ecc[0B] */
|
|
offset += 4;
|
|
val = ecc[0];
|
|
elm_write_reg(info, offset, val);
|
|
break;
|
|
case BCH4_ECC:
|
|
/* syndrome fragment 0 = ecc[20-52b] bits */
|
|
val = (cpu_to_be32(*(u32 *) &ecc[3]) >> 4) |
|
|
((ecc[2] & 0xf) << 28);
|
|
elm_write_reg(info, offset, val);
|
|
|
|
/* syndrome fragment 1 = ecc[0-20b] bits */
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[0]) >> 12;
|
|
elm_write_reg(info, offset, val);
|
|
break;
|
|
case BCH16_ECC:
|
|
val = cpu_to_be32(*(u32 *) &ecc[22]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[18]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[14]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[10]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[6]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[2]);
|
|
elm_write_reg(info, offset, val);
|
|
offset += 4;
|
|
val = cpu_to_be32(*(u32 *) &ecc[0]) >> 16;
|
|
elm_write_reg(info, offset, val);
|
|
break;
|
|
default:
|
|
pr_err("invalid config bch_type\n");
|
|
}
|
|
}
|
|
|
|
/* Update ecc pointer with ecc byte size */
|
|
ecc += info->ecc_syndrome_size;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* elm_start_processing - start elm syndrome processing
|
|
* @info: elm info
|
|
* @err_vec: elm error vectors
|
|
*
|
|
* Set syndrome valid bit for syndrome fragment registers for which
|
|
* elm syndrome fragment registers are loaded. This enables elm module
|
|
* to start processing syndrome vectors.
|
|
*/
|
|
static void elm_start_processing(struct elm_info *info,
|
|
struct elm_errorvec *err_vec)
|
|
{
|
|
int i, offset;
|
|
u32 reg_val;
|
|
|
|
/*
|
|
* Set syndrome vector valid, so that ELM module
|
|
* will process it for vectors error is reported
|
|
*/
|
|
for (i = 0; i < info->ecc_steps; i++) {
|
|
if (err_vec[i].error_reported) {
|
|
offset = ELM_SYNDROME_FRAGMENT_6 +
|
|
SYNDROME_FRAGMENT_REG_SIZE * i;
|
|
reg_val = elm_read_reg(info, offset);
|
|
reg_val |= ELM_SYNDROME_VALID;
|
|
elm_write_reg(info, offset, reg_val);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* elm_error_correction - locate correctable error position
|
|
* @info: elm info
|
|
* @err_vec: elm error vectors
|
|
*
|
|
* On completion of processing by elm module, error location status
|
|
* register updated with correctable/uncorrectable error information.
|
|
* In case of correctable errors, number of errors located from
|
|
* elm location status register & read the positions from
|
|
* elm error location register.
|
|
*/
|
|
static void elm_error_correction(struct elm_info *info,
|
|
struct elm_errorvec *err_vec)
|
|
{
|
|
int i, j, errors = 0;
|
|
int offset;
|
|
u32 reg_val;
|
|
|
|
for (i = 0; i < info->ecc_steps; i++) {
|
|
|
|
/* Check error reported */
|
|
if (err_vec[i].error_reported) {
|
|
offset = ELM_LOCATION_STATUS + ERROR_LOCATION_SIZE * i;
|
|
reg_val = elm_read_reg(info, offset);
|
|
|
|
/* Check correctable error or not */
|
|
if (reg_val & ECC_CORRECTABLE_MASK) {
|
|
offset = ELM_ERROR_LOCATION_0 +
|
|
ERROR_LOCATION_SIZE * i;
|
|
|
|
/* Read count of correctable errors */
|
|
err_vec[i].error_count = reg_val &
|
|
ECC_NB_ERRORS_MASK;
|
|
|
|
/* Update the error locations in error vector */
|
|
for (j = 0; j < err_vec[i].error_count; j++) {
|
|
|
|
reg_val = elm_read_reg(info, offset);
|
|
err_vec[i].error_loc[j] = reg_val &
|
|
ECC_ERROR_LOCATION_MASK;
|
|
|
|
/* Update error location register */
|
|
offset += 4;
|
|
}
|
|
|
|
errors += err_vec[i].error_count;
|
|
} else {
|
|
err_vec[i].error_uncorrectable = true;
|
|
}
|
|
|
|
/* Clearing interrupts for processed error vectors */
|
|
elm_write_reg(info, ELM_IRQSTATUS, BIT(i));
|
|
|
|
/* Disable page mode */
|
|
elm_configure_page_mode(info, i, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* elm_decode_bch_error_page - Locate error position
|
|
* @dev: device pointer
|
|
* @ecc_calc: calculated ECC bytes from GPMC
|
|
* @err_vec: elm error vectors
|
|
*
|
|
* Called with one or more error reported vectors & vectors with
|
|
* error reported is updated in err_vec[].error_reported
|
|
*/
|
|
void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
|
|
struct elm_errorvec *err_vec)
|
|
{
|
|
struct elm_info *info = dev_get_drvdata(dev);
|
|
u32 reg_val;
|
|
|
|
/* Enable page mode interrupt */
|
|
reg_val = elm_read_reg(info, ELM_IRQSTATUS);
|
|
elm_write_reg(info, ELM_IRQSTATUS, reg_val & INTR_STATUS_PAGE_VALID);
|
|
elm_write_reg(info, ELM_IRQENABLE, INTR_EN_PAGE_MASK);
|
|
|
|
/* Load valid ecc byte to syndrome fragment register */
|
|
elm_load_syndrome(info, err_vec, ecc_calc);
|
|
|
|
/* Enable syndrome processing for which syndrome fragment is updated */
|
|
elm_start_processing(info, err_vec);
|
|
|
|
/* Wait for ELM module to finish locating error correction */
|
|
wait_for_completion(&info->elm_completion);
|
|
|
|
/* Disable page mode interrupt */
|
|
reg_val = elm_read_reg(info, ELM_IRQENABLE);
|
|
elm_write_reg(info, ELM_IRQENABLE, reg_val & ~INTR_EN_PAGE_MASK);
|
|
elm_error_correction(info, err_vec);
|
|
}
|
|
EXPORT_SYMBOL(elm_decode_bch_error_page);
|
|
|
|
static irqreturn_t elm_isr(int this_irq, void *dev_id)
|
|
{
|
|
u32 reg_val;
|
|
struct elm_info *info = dev_id;
|
|
|
|
reg_val = elm_read_reg(info, ELM_IRQSTATUS);
|
|
|
|
/* All error vectors processed */
|
|
if (reg_val & INTR_STATUS_PAGE_VALID) {
|
|
elm_write_reg(info, ELM_IRQSTATUS,
|
|
reg_val & INTR_STATUS_PAGE_VALID);
|
|
complete(&info->elm_completion);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static int elm_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
struct resource *res, *irq;
|
|
struct elm_info *info;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->dev = &pdev->dev;
|
|
|
|
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!irq) {
|
|
dev_err(&pdev->dev, "no irq resource defined\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
info->elm_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(info->elm_base))
|
|
return PTR_ERR(info->elm_base);
|
|
|
|
ret = devm_request_irq(&pdev->dev, irq->start, elm_isr, 0,
|
|
pdev->name, info);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failure requesting irq %i\n", irq->start);
|
|
return ret;
|
|
}
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
if (pm_runtime_get_sync(&pdev->dev) < 0) {
|
|
ret = -EINVAL;
|
|
pm_runtime_disable(&pdev->dev);
|
|
dev_err(&pdev->dev, "can't enable clock\n");
|
|
return ret;
|
|
}
|
|
|
|
init_completion(&info->elm_completion);
|
|
INIT_LIST_HEAD(&info->list);
|
|
list_add(&info->list, &elm_devices);
|
|
platform_set_drvdata(pdev, info);
|
|
return ret;
|
|
}
|
|
|
|
static int elm_remove(struct platform_device *pdev)
|
|
{
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/**
|
|
* elm_context_save
|
|
* saves ELM configurations to preserve them across Hardware powered-down
|
|
*/
|
|
static int elm_context_save(struct elm_info *info)
|
|
{
|
|
struct elm_registers *regs = &info->elm_regs;
|
|
enum bch_ecc bch_type = info->bch_type;
|
|
u32 offset = 0, i;
|
|
|
|
regs->elm_irqenable = elm_read_reg(info, ELM_IRQENABLE);
|
|
regs->elm_sysconfig = elm_read_reg(info, ELM_SYSCONFIG);
|
|
regs->elm_location_config = elm_read_reg(info, ELM_LOCATION_CONFIG);
|
|
regs->elm_page_ctrl = elm_read_reg(info, ELM_PAGE_CTRL);
|
|
for (i = 0; i < ERROR_VECTOR_MAX; i++) {
|
|
offset = i * SYNDROME_FRAGMENT_REG_SIZE;
|
|
switch (bch_type) {
|
|
case BCH16_ECC:
|
|
regs->elm_syndrome_fragment_6[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_6 + offset);
|
|
regs->elm_syndrome_fragment_5[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_5 + offset);
|
|
regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_4 + offset);
|
|
case BCH8_ECC:
|
|
regs->elm_syndrome_fragment_3[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_3 + offset);
|
|
regs->elm_syndrome_fragment_2[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_2 + offset);
|
|
case BCH4_ECC:
|
|
regs->elm_syndrome_fragment_1[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_1 + offset);
|
|
regs->elm_syndrome_fragment_0[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_0 + offset);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
/* ELM SYNDROME_VALID bit in SYNDROME_FRAGMENT_6[] needs
|
|
* to be saved for all BCH schemes*/
|
|
regs->elm_syndrome_fragment_6[i] = elm_read_reg(info,
|
|
ELM_SYNDROME_FRAGMENT_6 + offset);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* elm_context_restore
|
|
* writes configurations saved duing power-down back into ELM registers
|
|
*/
|
|
static int elm_context_restore(struct elm_info *info)
|
|
{
|
|
struct elm_registers *regs = &info->elm_regs;
|
|
enum bch_ecc bch_type = info->bch_type;
|
|
u32 offset = 0, i;
|
|
|
|
elm_write_reg(info, ELM_IRQENABLE, regs->elm_irqenable);
|
|
elm_write_reg(info, ELM_SYSCONFIG, regs->elm_sysconfig);
|
|
elm_write_reg(info, ELM_LOCATION_CONFIG, regs->elm_location_config);
|
|
elm_write_reg(info, ELM_PAGE_CTRL, regs->elm_page_ctrl);
|
|
for (i = 0; i < ERROR_VECTOR_MAX; i++) {
|
|
offset = i * SYNDROME_FRAGMENT_REG_SIZE;
|
|
switch (bch_type) {
|
|
case BCH16_ECC:
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_6 + offset,
|
|
regs->elm_syndrome_fragment_6[i]);
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_5 + offset,
|
|
regs->elm_syndrome_fragment_5[i]);
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
|
|
regs->elm_syndrome_fragment_4[i]);
|
|
case BCH8_ECC:
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_3 + offset,
|
|
regs->elm_syndrome_fragment_3[i]);
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_2 + offset,
|
|
regs->elm_syndrome_fragment_2[i]);
|
|
case BCH4_ECC:
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_1 + offset,
|
|
regs->elm_syndrome_fragment_1[i]);
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_0 + offset,
|
|
regs->elm_syndrome_fragment_0[i]);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
/* ELM_SYNDROME_VALID bit to be set in last to trigger FSM */
|
|
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_6 + offset,
|
|
regs->elm_syndrome_fragment_6[i] &
|
|
ELM_SYNDROME_VALID);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int elm_suspend(struct device *dev)
|
|
{
|
|
struct elm_info *info = dev_get_drvdata(dev);
|
|
elm_context_save(info);
|
|
pm_runtime_put_sync(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int elm_resume(struct device *dev)
|
|
{
|
|
struct elm_info *info = dev_get_drvdata(dev);
|
|
pm_runtime_get_sync(dev);
|
|
elm_context_restore(info);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(elm_pm_ops, elm_suspend, elm_resume);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id elm_of_match[] = {
|
|
{ .compatible = "ti,am3352-elm" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, elm_of_match);
|
|
#endif
|
|
|
|
static struct platform_driver elm_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.of_match_table = of_match_ptr(elm_of_match),
|
|
.pm = &elm_pm_ops,
|
|
},
|
|
.probe = elm_probe,
|
|
.remove = elm_remove,
|
|
};
|
|
|
|
module_platform_driver(elm_driver);
|
|
|
|
MODULE_DESCRIPTION("ELM driver for BCH error correction");
|
|
MODULE_AUTHOR("Texas Instruments");
|
|
MODULE_ALIAS("platform:" DRIVER_NAME);
|
|
MODULE_LICENSE("GPL v2");
|