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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2021-12-16 12:16:38 +0100 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2022-01-23 12:36:23 +0100 |
| commit | 96489c1c0b53131b0e1ec33e2060538379ad6152 (patch) | |
| tree | 29f7e598a55675522722d1b6d9f48e948a4a0c7e /drivers/mtd/nand/core.c | |
| parent | 1d46963d453770ac68d954e61f094eba6e42744f (diff) | |
| download | linux-stable-96489c1c0b53131b0e1ec33e2060538379ad6152.tar.gz linux-stable-96489c1c0b53131b0e1ec33e2060538379ad6152.tar.bz2 linux-stable-96489c1c0b53131b0e1ec33e2060538379ad6152.zip | |
mtd: nand: ecc: Add infrastructure to support hardware engines
Add the necessary helpers to register/unregister hardware ECC engines
that will be called from ECC engine drivers.
Also add helpers to get the right engine from the user
perspective. Keep a reference of the in use ECC engine in order to
prevent modules to be unloaded. Put the reference when the engine gets
retired.
A static list of hardware (only) ECC engines is setup to keep track of
the registered engines.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-13-miquel.raynal@bootlin.com
Diffstat (limited to 'drivers/mtd/nand/core.c')
| -rw-r--r-- | drivers/mtd/nand/core.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/mtd/nand/core.c b/drivers/mtd/nand/core.c index 416947f28b67..ff34e3fd84c0 100644 --- a/drivers/mtd/nand/core.c +++ b/drivers/mtd/nand/core.c @@ -235,7 +235,9 @@ static int nanddev_get_ecc_engine(struct nand_device *nand) nand->ecc.engine = nand_ecc_get_on_die_hw_engine(nand); break; case NAND_ECC_ENGINE_TYPE_ON_HOST: - pr_err("On-host hardware ECC engines not supported yet\n"); + nand->ecc.engine = nand_ecc_get_on_host_hw_engine(nand); + if (PTR_ERR(nand->ecc.engine) == -EPROBE_DEFER) + return -EPROBE_DEFER; break; default: pr_err("Missing ECC engine type\n"); @@ -255,7 +257,7 @@ static int nanddev_put_ecc_engine(struct nand_device *nand) { switch (nand->ecc.ctx.conf.engine_type) { case NAND_ECC_ENGINE_TYPE_ON_HOST: - pr_err("On-host hardware ECC engines not supported yet\n"); + nand_ecc_put_on_host_hw_engine(nand); break; case NAND_ECC_ENGINE_TYPE_NONE: case NAND_ECC_ENGINE_TYPE_SOFT: @@ -300,7 +302,9 @@ int nanddev_ecc_engine_init(struct nand_device *nand) /* Look for the ECC engine to use */ ret = nanddev_get_ecc_engine(nand); if (ret) { - pr_err("No ECC engine found\n"); + if (ret != -EPROBE_DEFER) + pr_err("No ECC engine found\n"); + return ret; } |