diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-07-18 12:56:33 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-08-06 13:55:03 +0200 |
| commit | 2f1cfea510284f1ab6aa9b7268a4dba28748ee0e (patch) | |
| tree | a1020484cf71c58e154d1839a2f3662fbf7dec71 | |
| parent | faf766e2b21661ad8e247d1d83f571bfa9d55d8f (diff) | |
| download | barebox-2f1cfea510284f1ab6aa9b7268a4dba28748ee0e.tar.gz barebox-2f1cfea510284f1ab6aa9b7268a4dba28748ee0e.tar.xz | |
mtd: nand: Add function to parse device tree properties
This adds nand_of_parse_node() which can be used to parse generic
NAND device properties. Not very complete yet, but it's a start.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 27 | ||||
| -rw-r--r-- | include/linux/mtd/nand.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index bf15e6ccee..e103eac596 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -43,6 +43,7 @@ #include <io.h> #include <malloc.h> #include <module.h> +#include <of_mtd.h> /* Define default oob placement schemes for large and small page devices */ static struct nand_ecclayout nand_oob_8 = { @@ -3507,6 +3508,32 @@ ident_done: } /** + * nand_of_parse_node - parse generic NAND properties + * @mtd: MTD device structure + * @np: Device node to read information from + * + * This parses device tree properties generic to NAND controllers and fills in + * the various fields in struct nand_chip. + */ +void nand_of_parse_node(struct mtd_info *mtd, struct device_node *np) +{ + struct nand_chip *chip = mtd->priv; + int ecc_strength, ecc_size; + + if (!IS_ENABLED(CONFIG_OFDEVICE)) + return; + + ecc_strength = of_get_nand_ecc_strength(np); + ecc_size = of_get_nand_ecc_step_size(np); + + if (ecc_strength >= 0) + chip->ecc.strength = ecc_strength; + + if (ecc_size >= 0) + chip->ecc.size = ecc_size; +} + +/** * nand_scan_ident - [NAND Interface] Scan for the NAND device * @mtd: MTD device structure * @maxchips: number of chips to scan for diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 785cb06030..7f17767c69 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -52,6 +52,8 @@ extern int nand_check_erased_ecc_chunk(void *data, int datalen, int bitflips_threshold); int nand_check_erased_buf(void *buf, int len, int bitflips_threshold); +void nand_of_parse_node(struct mtd_info *mtd, struct device_node *np); + /* The maximum number of NAND chips in an array */ #define NAND_MAX_CHIPS 8 |