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mtd: devices: elm: configure parallel channels based on ecc_steps

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ELM hardware can process up to maximum of 8 hannels in parallel for
ECC error detection. Currently the number of channels getting configured for
processing is static determined by macro ERROR_VECTOR_MAX. However, the actual
number of channels that need to be processed is the ECC step number.
This patch just avoids configuring extra unused channels.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Pekon Gupta 2014-03-20 18:48:36 +05:30 committed by Brian Norris
parent ea0760244d
commit 79f013518d
1 changed files with 5 additions and 3 deletions
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8
drivers/mtd/devices/elm.c
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@ -84,6 +84,7 @@ struct elm_info {
struct list_head list; struct list_head list;
enum bch_ecc bch_type; enum bch_ecc bch_type;
struct elm_registers elm_regs; struct elm_registers elm_regs;
int ecc_steps;
int ecc_syndrome_size; int ecc_syndrome_size;
}; };
@ -128,6 +129,7 @@ int elm_config(struct device *dev, enum bch_ecc bch_type,
reg_val = (bch_type & ECC_BCH_LEVEL_MASK) | (ELM_ECC_SIZE << 16); reg_val = (bch_type & ECC_BCH_LEVEL_MASK) | (ELM_ECC_SIZE << 16);
elm_write_reg(info, ELM_LOCATION_CONFIG, reg_val); elm_write_reg(info, ELM_LOCATION_CONFIG, reg_val);
info->bch_type = bch_type; info->bch_type = bch_type;
info->ecc_steps = ecc_steps;
info->ecc_syndrome_size = ecc_syndrome_size; info->ecc_syndrome_size = ecc_syndrome_size;
return 0; return 0;
@ -170,7 +172,7 @@ static void elm_load_syndrome(struct elm_info *info,
int i, offset; int i, offset;
u32 val; u32 val;
for (i = 0; i < ERROR_VECTOR_MAX; i++) { for (i = 0; i < info->ecc_steps; i++) {
/* Check error reported */ /* Check error reported */
if (err_vec[i].error_reported) { if (err_vec[i].error_reported) {
@ -238,7 +240,7 @@ static void elm_start_processing(struct elm_info *info,
* Set syndrome vector valid, so that ELM module * Set syndrome vector valid, so that ELM module
* will process it for vectors error is reported * will process it for vectors error is reported
*/ */
for (i = 0; i < ERROR_VECTOR_MAX; i++) { for (i = 0; i < info->ecc_steps; i++) {
if (err_vec[i].error_reported) { if (err_vec[i].error_reported) {
offset = ELM_SYNDROME_FRAGMENT_6 + offset = ELM_SYNDROME_FRAGMENT_6 +
SYNDROME_FRAGMENT_REG_SIZE * i; SYNDROME_FRAGMENT_REG_SIZE * i;
@ -267,7 +269,7 @@ static void elm_error_correction(struct elm_info *info,
int offset; int offset;
u32 reg_val; u32 reg_val;
for (i = 0; i < ERROR_VECTOR_MAX; i++) { for (i = 0; i < info->ecc_steps; i++) {
/* Check error reported */ /* Check error reported */
if (err_vec[i].error_reported) { if (err_vec[i].error_reported) {