Messages in this thread Patch in this message | | | From | Boris BREZILLON <> | Subject | [RFC PATCH v2 06/14] of: mtd: add NAND timing mode retrieval support | Date | Wed, 29 Jan 2014 15:34:16 +0100 |
| |
Add a function to retrieve NAND timing mode (ONFI timing mode) from a given DT node.
Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com> --- drivers/of/of_mtd.c | 19 +++++++++++++++++++ include/linux/of_mtd.h | 8 ++++++++ 2 files changed, 27 insertions(+)
diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c index e8ced61..63155d4 100644 --- a/drivers/of/of_mtd.c +++ b/drivers/of/of_mtd.c @@ -108,3 +108,22 @@ bool of_get_nand_on_flash_bbt(struct device_node *np) return of_property_read_bool(np, "nand-on-flash-bbt"); } EXPORT_SYMBOL_GPL(of_get_nand_on_flash_bbt); + +/** + * of_get_nand_timings - Get nand timings for the given device_node + * @np: Pointer to the given device_node + * + * return 0 on success errno other wise + */ +int of_get_nand_onfi_timing_mode(struct device_node *np) +{ + int err; + u32 mode; + + err = of_property_read_u32(np, "onfi,nand-timing-mode", &mode); + if (err) + return err; + + return mode; +} +EXPORT_SYMBOL_GPL(of_get_nand_onfi_timing_mode); diff --git a/include/linux/of_mtd.h b/include/linux/of_mtd.h index 3bd8c3b..eb9fda6 100644 --- a/include/linux/of_mtd.h +++ b/include/linux/of_mtd.h @@ -9,6 +9,8 @@ #ifndef __LINUX_OF_MTD_H #define __LINUX_OF_NET_H +#include <linux/mtd/nand.h> + #ifdef CONFIG_OF_MTD #include <linux/of.h> @@ -16,6 +18,7 @@ int of_get_nand_ecc_mode(struct device_node *np); int of_get_nand_ecc_level(struct device_node *np, u32 *strengh, u32 *blk_size); int of_get_nand_bus_width(struct device_node *np); bool of_get_nand_on_flash_bbt(struct device_node *np); +int of_get_nand_onfi_timing_mode(struct device_node *np); #else /* CONFIG_OF_MTD */ @@ -40,6 +43,11 @@ static inline bool of_get_nand_on_flash_bbt(struct device_node *np) return false; } +static inline int of_get_nand_onfi_timing_mode(struct device_node *np) +{ + return -ENOSYS; +} + #endif /* CONFIG_OF_MTD */ #endif /* __LINUX_OF_MTD_H */ -- 1.7.9.5
| |