diff options
| author | Arseniy Krasnov <[email protected]> | 2024-08-26 16:17:08 +0300 |
|---|---|---|
| committer | Neil Armstrong <[email protected]> | 2024-08-28 16:05:45 +0200 |
| commit | 9905e77edaa9b4a43285e587317c600ffa7be7ca (patch) | |
| tree | d40601e8d311af73da8331980f5868da6891e4e3 | |
| parent | ee2af844ba1b27b2e959c4e649e4b769fbeb4074 (diff) | |
mtd: rawnand: nand_base: support for 'NAND_IS_BOOT_MEDIUM' flag
Based on Linux kernel:
commit f922bd798bb9 ("mtd: rawnand: add an option to specify NAND chip as a boot device")
Allow to define a NAND chip as a boot device. This can be helpful
for the selection of the ECC algorithm and strength in case the boot
ROM supports only a subset of controller provided options.
Signed-off-by: Arseniy Krasnov <[email protected]>
Reviewed-by: Michael Trimarchi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>
| -rw-r--r-- | drivers/mtd/nand/raw/nand_base.c | 3 | ||||
| -rw-r--r-- | include/linux/mtd/rawnand.h | 5 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 4401bdcdb90..0545c23e268 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4454,6 +4454,9 @@ static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, ofnode nod if (ret == 16) chip->options |= NAND_BUSWIDTH_16; + if (ofnode_read_bool(node, "nand-is-boot-medium")) + chip->options |= NAND_IS_BOOT_MEDIUM; + if (ofnode_read_bool(node, "nand-on-flash-bbt")) chip->bbt_options |= NAND_BBT_USE_FLASH; diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 537c62424a1..2d85b392465 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -247,6 +247,11 @@ enum nand_ecc_algo { * kmap'ed, vmalloc'ed highmem buffers being passed from upper layers */ #define NAND_USE_BOUNCE_BUFFER 0x00100000 +/* + * Whether the NAND chip is a boot medium. Drivers might use this information + * to select ECC algorithms supported by the boot ROM or similar restrictions. + */ +#define NAND_IS_BOOT_MEDIUM 0x00400000 /* * Do not try to tweak the timings at runtime. This is needed when the |