Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752669AbaA2Oej (ORCPT ); Wed, 29 Jan 2014 09:34:39 -0500 Received: from mail-ee0-f41.google.com ([74.125.83.41]:33311 "EHLO mail-ee0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751575AbaA2Oef (ORCPT ); Wed, 29 Jan 2014 09:34:35 -0500 From: Boris BREZILLON To: Maxime Ripard , Rob Landley , Russell King , David Woodhouse , Grant Likely , Brian Norris , Jason Gunthorpe , Arnd Bergmann Cc: Boris BREZILLON , devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mtd@lists.infradead.org, dev@linux-sunxi.org Subject: [RFC PATCH v2 02/14] of: mtd: add NAND ECC level requirements retrieval Date: Wed, 29 Jan 2014 15:34:12 +0100 Message-Id: <1391006064-28890-3-git-send-email-b.brezillon.dev@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1391006064-28890-1-git-send-email-b.brezillon.dev@gmail.com> References: <1391006064-28890-1-git-send-email-b.brezillon.dev@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some chip do not support automatic retrieval of ECC level requirements. Provide an helper function to retrieve these requirements from DT. Signed-off-by: Boris BREZILLON --- drivers/of/of_mtd.c | 25 +++++++++++++++++++++++++ include/linux/of_mtd.h | 7 +++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c index a27ec94..e8ced61 100644 --- a/drivers/of/of_mtd.c +++ b/drivers/of/of_mtd.c @@ -50,6 +50,31 @@ int of_get_nand_ecc_mode(struct device_node *np) EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode); /** + * of_get_nand_ecc_level - Get nand ecc level for the given device_node + * @np: Pointer to the given device_node + * @strengh: ECC strength + * @blk_size: ECC block size + * + * The function gets ecc level requirements from property 'nand-ecc-level'. + * Return 0 on success, -errno otherwise. + */ +int of_get_nand_ecc_level(struct device_node *np, u32 *strengh, u32 *blk_size) +{ + int err; + + err = of_property_read_u32_index(np, "nand-ecc-level", 0, strengh); + if (err < 0) + return err; + + err = of_property_read_u32_index(np, "nand-ecc-level", 1, blk_size); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(of_get_nand_ecc_level); + +/** * of_get_nand_bus_width - Get nand bus witdh for given device_node * @np: Pointer to the given device_node * diff --git a/include/linux/of_mtd.h b/include/linux/of_mtd.h index 6f10e93..3bd8c3b 100644 --- a/include/linux/of_mtd.h +++ b/include/linux/of_mtd.h @@ -13,6 +13,7 @@ #include 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); @@ -23,6 +24,12 @@ static inline int of_get_nand_ecc_mode(struct device_node *np) return -ENOSYS; } +static inline int of_get_nand_ecc_level(struct device_node *np, u32 *strengh, + u32 *blk_size) +{ + return -ENOSYS; +} + static inline int of_get_nand_bus_width(struct device_node *np) { return -ENOSYS; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/