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Commit 79f01351 authored by Pekon Gupta's avatar Pekon Gupta Committed by Brian Norris
Browse files

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



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: default avatarPekon Gupta <pekon@ti.com>
Reviewed-by: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent ea076024

drivers/mtd/devices/elm.c

+5 −3
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ struct elm_info { 
	struct list_head list;

	enum bch_ecc bch_type;

	struct elm_registers elm_regs;

	int ecc_steps;

	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);

	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;
@@ -170,7 +172,7 @@ static void elm_load_syndrome(struct elm_info *info, 
	int i, offset;

	u32 val;



	for (i = 0; i < ERROR_VECTOR_MAX; i++) {

	for (i = 0; i < info->ecc_steps; i++) {



		/* Check 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

	 * 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) {

			offset = ELM_SYNDROME_FRAGMENT_6 +

				SYNDROME_FRAGMENT_REG_SIZE * i;
@@ -267,7 +269,7 @@ static void elm_error_correction(struct elm_info *info, 
	int offset;

	u32 reg_val;



	for (i = 0; i < ERROR_VECTOR_MAX; i++) {

	for (i = 0; i < info->ecc_steps; i++) {



		/* Check error reported */

		if (err_vec[i].error_reported) {