Add a function to retrieve NAND timings from a given DT node. Signed-off-by: Boris BREZILLON <b.brezillon@xxxxxxxxxxx> --- drivers/of/of_mtd.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/of_mtd.h | 9 +++++++++ 2 files changed, 56 insertions(+) diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c index a27ec94..52e07fd 100644 --- a/drivers/of/of_mtd.c +++ b/drivers/of/of_mtd.c @@ -83,3 +83,50 @@ 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_timings(struct device_node *np, struct nand_timings *timings) +{ + memset(timings, 0, sizeof(*timings)); + + of_property_read_u32(np, "tCLS-min", &timings->tCLS_min); + of_property_read_u32(np, "tCLH-min", &timings->tCLH_min); + of_property_read_u32(np, "tCS-min", &timings->tCS_min); + of_property_read_u32(np, "tCH-min", &timings->tCH_min); + of_property_read_u32(np, "tWP-min", &timings->tWP_min); + of_property_read_u32(np, "tALS-min", &timings->tALS_min); + of_property_read_u32(np, "tALH-min", &timings->tALH_min); + of_property_read_u32(np, "tDS-min", &timings->tDS_min); + of_property_read_u32(np, "tDH-min", &timings->tDH_min); + of_property_read_u32(np, "tWC-min", &timings->tWC_min); + of_property_read_u32(np, "tWH-min", &timings->tWH_min); + of_property_read_u32(np, "tR-max", &timings->tR_max); + of_property_read_u32(np, "tAR-min", &timings->tAR_min); + of_property_read_u32(np, "tCLR-min", &timings->tCLR_min); + of_property_read_u32(np, "tRR-min", &timings->tRR_min); + of_property_read_u32(np, "tRP-min", &timings->tRP_min); + of_property_read_u32(np, "tWB-max", &timings->tWB_max); + of_property_read_u32(np, "tRC-min", &timings->tRC_min); + of_property_read_u32(np, "tREA-max", &timings->tREA_max); + of_property_read_u32(np, "tRHZ-max", &timings->tRHZ_max); + of_property_read_u32(np, "tCHZ-max", &timings->tCHZ_max); + of_property_read_u32(np, "tRHOH-min", &timings->tRHOH_min); + of_property_read_u32(np, "tRLOH-min", &timings->tRLOH_min); + of_property_read_u32(np, "tCOH-min", &timings->tCOH_min); + of_property_read_u32(np, "tREH-min", &timings->tREH_min); + of_property_read_u32(np, "tWHR-min", &timings->tWHR_min); + of_property_read_u32(np, "tRHW-min", &timings->tRHW_min); + of_property_read_u32(np, "tIR-min", &timings->tIR_min); + of_property_read_u32(np, "tCR-min", &timings->tCR_min); + of_property_read_u32(np, "tADL-min", &timings->tADL_min); + of_property_read_u32(np, "tRST-max", &timings->tRST_max); + of_property_read_u32(np, "tWW-min", &timings->tWW_min); + + return 0; +} +EXPORT_SYMBOL_GPL(of_get_nand_timings); diff --git a/include/linux/of_mtd.h b/include/linux/of_mtd.h index 6f10e93..ecedb5f 100644 --- a/include/linux/of_mtd.h +++ b/include/linux/of_mtd.h @@ -9,12 +9,15 @@ #ifndef __LINUX_OF_MTD_H #define __LINUX_OF_NET_H +#include <linux/mtd/nand.h> + #ifdef CONFIG_OF_MTD #include <linux/of.h> int of_get_nand_ecc_mode(struct device_node *np); 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_timings(struct device_node *np, struct nand_timings *timings); #else /* CONFIG_OF_MTD */ @@ -33,6 +36,12 @@ static inline bool of_get_nand_on_flash_bbt(struct device_node *np) return false; } +static inline int of_get_nand_timings(struct device_node *np, + struct nand_timings *timings) +{ + return -ENOSYS; +} + #endif /* CONFIG_OF_MTD */ #endif /* __LINUX_OF_MTD_H */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html