github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mtd: spinand: Add support for randomizer

Browse Source 
This patch adds support for the randomizer feature.

It introduces a 'set_randomizer' callback in 'struct spinand_info' and
'struct spinand_device'.

If a driver implements this callback, the core will invoke it during
device initialization (spinand_init) to enable or disable the randomizer
feature based on the device tree configuration.

Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Cheng Ming Lin 2026-05-05 09:34:52 +08:00 committed by Miquel Raynal
parent cf496ebf13
commit 54e1bc80af
2 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/mtd/nand/spi/core.c
View File

@ -1328,6 +1328,22 @@ static int spinand_create_dirmaps(struct spinand_device *spinand)
return 0;
}
static int spinand_randomizer_init(struct spinand_device *spinand)
{
struct device_node *np = spinand->spimem->spi->dev.of_node;
u32 rand_val;
int ret;
if (!spinand->set_randomizer)
return 0;
ret = of_property_read_u32(np, "nand-randomizer", &rand_val);
if (ret)
return 0;
return spinand->set_randomizer(spinand, rand_val);
}
static const struct nand_ops spinand_ops = {
.erase = spinand_erase,
.markbad = spinand_markbad,
@ -1619,6 +1635,7 @@ int spinand_match_and_init(struct spinand_device *spinand,
spinand->user_otp = &table[i].user_otp;
spinand->read_retries = table[i].read_retries;
spinand->set_read_retry = table[i].set_read_retry;
spinand->set_randomizer = table[i].set_randomizer;
/* I/O variants selection with single-spi SDR commands */
@ -1942,6 +1959,9 @@ static int spinand_init(struct spinand_device *spinand)
* ECC initialization must have happened previously.
*/
spinand_cont_read_init(spinand);
ret = spinand_randomizer_init(spinand);
if (ret)
goto err_cleanup_nanddev;
mtd->_read_oob = spinand_mtd_read;
mtd->_write_oob = spinand_mtd_write;

9
include/linux/mtd/spinand.h
View File

@ -593,6 +593,7 @@ enum spinand_bus_interface {
* @user_otp: SPI NAND user OTP info.
* @read_retries: the number of read retry modes supported
* @set_read_retry: enable/disable read retry for data recovery
* @set_randomizer: enable/disable randomizer support
*
* Each SPI NAND manufacturer driver should have a spinand_info table
* describing all the chips supported by the driver.
@ -622,6 +623,8 @@ struct spinand_info {
unsigned int read_retries;
int (*set_read_retry)(struct spinand_device *spinand,
unsigned int read_retry);
int (*set_randomizer)(struct spinand_device *spinand,
bool enable);
};
#define SPINAND_ID(__method, ...) \
@ -686,6 +689,9 @@ struct spinand_info {
.read_retries = __read_retries, \
.set_read_retry = __set_read_retry
#define SPINAND_RANDOMIZER(__set_randomizer) \
.set_randomizer = __set_randomizer
#define SPINAND_INFO(__model, __id, __memorg, __eccreq, __op_variants, \
__flags, ...) \
{ \
@ -771,6 +777,7 @@ struct spinand_mem_ops {
* @user_otp: SPI NAND user OTP info.
* @read_retries: the number of read retry modes supported
* @set_read_retry: Enable/disable the read retry feature
* @set_randomizer: Enable/disable the randomizer feature
*/
struct spinand_device {
struct nand_device base;
@ -804,6 +811,8 @@ struct spinand_device {
bool cont_read_possible;
int (*set_cont_read)(struct spinand_device *spinand,
bool enable);
int (*set_randomizer)(struct spinand_device *spinand,
bool enable);
const struct spinand_fact_otp *fact_otp;
const struct spinand_user_otp *user_otp;