From mboxrd@z Thu Jan 1 00:00:00 1970 From: b.brezillon.dev@gmail.com (Boris BREZILLON) Date: Wed, 12 Mar 2014 19:07:38 +0100 Subject: [PATCH v3 3/9] of: mtd: add NAND timing mode retrieval support In-Reply-To: <1394647664-8258-1-git-send-email-b.brezillon.dev@gmail.com> References: <1394647664-8258-1-git-send-email-b.brezillon.dev@gmail.com> Message-ID: <1394647664-8258-4-git-send-email-b.brezillon.dev@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add a function to retrieve NAND timing mode (ONFI timing mode) from a given DT node. Signed-off-by: Boris BREZILLON --- 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 b7361ed..8bdaa0b 100644 --- a/drivers/of/of_mtd.c +++ b/drivers/of/of_mtd.c @@ -117,3 +117,22 @@ 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 e266caa..c8310ae 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_MTD_H +#include + #ifdef CONFIG_OF_MTD #include @@ -17,6 +19,7 @@ int of_get_nand_ecc_step_size(struct device_node *np); int of_get_nand_ecc_strength(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_onfi_timing_mode(struct device_node *np); #else /* CONFIG_OF_MTD */ @@ -45,6 +48,11 @@ 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