Messages in this thread Patch in this message |  | | From | Cheng Ming Lin <> | | Subject | [PATCH v10 2/3] mtd: spi-nand: Add support for randomizer | | Date | Tue, 5 May 2026 09:34:52 +0800 |
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From: Cheng Ming Lin <chengminglin@mxic.com.tw>
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> --- drivers/mtd/nand/spi/core.c | 20 ++++++++++++++++++++ include/linux/mtd/spinand.h | 9 +++++++++ 2 files changed, 29 insertions(+)
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 8aa3753aa..78557e48f 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -1307,6 +1307,22 @@ 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, @@ -1594,6 +1610,7 @@ 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 */ @@ -1881,6 +1898,9 @@ 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; diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 58abd306e..9ec45b727 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -585,6 +585,7 @@ 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. @@ -613,6 +614,8 @@ 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, ...) \ @@ -669,6 +672,9 @@ 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, ...) \ { \ @@ -754,6 +760,7 @@ 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; @@ -787,6 +794,8 @@ 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; -- 2.25.1
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