From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miquel Raynal Subject: [PATCH 05/12] mtd: nand: remove useless fields from pxa3xx NAND platform data Date: Thu, 7 Dec 2017 21:18:07 +0100 Message-ID: <20171207201814.30411-6-miquel.raynal@free-electrons.com> References: <20171207201814.30411-1-miquel.raynal@free-electrons.com> Return-path: In-Reply-To: <20171207201814.30411-1-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Cyrille Pitchen , Rob Herring , Mark Rutland , Jason Cooper , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Russell King , Daniel Mack , Haojian Zhuang , Robert Jarzmik , Eric Miao , Catalin Marinas Cc: linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Thomas Petazzoni , Antoine Tenart , Nadav Haklai , Miquel Raynal , Ofer Heifetz , Hanna Hawa , Neta Zur Hershkovits List-Id: devicetree@vger.kernel.org The "enable arbiter" bit is available only for pxa3xx based platforms but it was experimentally shown that even if this bit is reserved, some Marvell platforms (64-bit) actually need it to be set. The driver always set this bit regardless of this property, which is harmless. Then this property is not needed. The "num_cs" field is always 1 and for a good reason, the old driver (pxa3xx_nand.c) could only handle one. The new driver that replaces it (marvell_nand.c) can handle more, but better use device tree for such description. As there is only one available chip select, there is no need for an array of partitions neither an array of partition numbers. Signed-off-by: Miquel Raynal --- arch/arm/mach-pxa/cm-x300.c | 6 ++-- arch/arm/mach-pxa/colibri-pxa3xx.c | 6 ++-- arch/arm/mach-pxa/littleton.c | 6 ++-- arch/arm/mach-pxa/mxm8x10.c | 6 ++-- arch/arm/mach-pxa/raumfeld.c | 6 ++-- arch/arm/mach-pxa/zylonite.c | 6 ++-- drivers/mtd/nand/marvell_nand.c | 3 +- include/linux/platform_data/mtd-nand-pxa3xx.h | 43 ++++++++------------------- 8 files changed, 25 insertions(+), 57 deletions(-) diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c index 89326378dabf..23bb273f3ff3 100644 --- a/arch/arm/mach-pxa/cm-x300.c +++ b/arch/arm/mach-pxa/cm-x300.c @@ -429,11 +429,9 @@ static struct mtd_partition cm_x300_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data cm_x300_nand_info = { - .enable_arbiter = 1, .keep_config = 1, - .num_cs = 1, - .parts[0] = cm_x300_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(cm_x300_nand_partitions), + .parts = cm_x300_nand_partitions, + .nr_parts = ARRAY_SIZE(cm_x300_nand_partitions), }; static void __init cm_x300_init_nand(void) diff --git a/arch/arm/mach-pxa/colibri-pxa3xx.c b/arch/arm/mach-pxa/colibri-pxa3xx.c index c9c36f707555..adec6e013fe6 100644 --- a/arch/arm/mach-pxa/colibri-pxa3xx.c +++ b/arch/arm/mach-pxa/colibri-pxa3xx.c @@ -138,11 +138,9 @@ static struct mtd_partition colibri_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data colibri_nand_info = { - .enable_arbiter = 1, .keep_config = 1, - .num_cs = 1, - .parts[0] = colibri_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(colibri_nand_partitions), + .parts = colibri_nand_partitions, + .nr_parts = ARRAY_SIZE(colibri_nand_partitions), }; void __init colibri_pxa3xx_init_nand(void) diff --git a/arch/arm/mach-pxa/littleton.c b/arch/arm/mach-pxa/littleton.c index 898961be36db..7e120e884165 100644 --- a/arch/arm/mach-pxa/littleton.c +++ b/arch/arm/mach-pxa/littleton.c @@ -328,10 +328,8 @@ static struct mtd_partition littleton_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data littleton_nand_info = { - .enable_arbiter = 1, - .num_cs = 1, - .parts[0] = littleton_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(littleton_nand_partitions), + .parts = littleton_nand_partitions, + .nr_parts = ARRAY_SIZE(littleton_nand_partitions), }; static void __init littleton_init_nand(void) diff --git a/arch/arm/mach-pxa/mxm8x10.c b/arch/arm/mach-pxa/mxm8x10.c index 7d7aab20b70a..328689052668 100644 --- a/arch/arm/mach-pxa/mxm8x10.c +++ b/arch/arm/mach-pxa/mxm8x10.c @@ -389,11 +389,9 @@ static struct mtd_partition mxm_8x10_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data mxm_8x10_nand_info = { - .enable_arbiter = 1, .keep_config = 1, - .num_cs = 1, - .parts[0] = mxm_8x10_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(mxm_8x10_nand_partitions) + .parts = mxm_8x10_nand_partitions, + .nr_parts = ARRAY_SIZE(mxm_8x10_nand_partitions) }; static void __init mxm_8x10_nand_init(void) diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c index 9d662fed03ec..af72e79a7ffa 100644 --- a/arch/arm/mach-pxa/raumfeld.c +++ b/arch/arm/mach-pxa/raumfeld.c @@ -346,11 +346,9 @@ static struct mtd_partition raumfeld_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data raumfeld_nand_info = { - .enable_arbiter = 1, .keep_config = 1, - .num_cs = 1, - .parts[0] = raumfeld_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(raumfeld_nand_partitions), + .parts = raumfeld_nand_partitions, + .nr_parts = ARRAY_SIZE(raumfeld_nand_partitions), }; /** diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c index a4577118d518..0534949d63f6 100644 --- a/arch/arm/mach-pxa/zylonite.c +++ b/arch/arm/mach-pxa/zylonite.c @@ -376,10 +376,8 @@ static struct mtd_partition zylonite_nand_partitions[] = { }; static struct pxa3xx_nand_platform_data zylonite_nand_info = { - .enable_arbiter = 1, - .num_cs = 1, - .parts[0] = zylonite_nand_partitions, - .nr_parts[0] = ARRAY_SIZE(zylonite_nand_partitions), + .parts = zylonite_nand_partitions, + .nr_parts = ARRAY_SIZE(zylonite_nand_partitions), }; static void __init zylonite_init_nand(void) diff --git a/drivers/mtd/nand/marvell_nand.c b/drivers/mtd/nand/marvell_nand.c index 2525d9b2f4fa..75fbb3ea4977 100644 --- a/drivers/mtd/nand/marvell_nand.c +++ b/drivers/mtd/nand/marvell_nand.c @@ -2579,8 +2579,7 @@ static int marvell_nand_chip_init(struct device *dev, struct marvell_nfc *nfc, if (pdata) /* Legacy bindings support only one chip */ - ret = mtd_device_register(mtd, pdata->parts[0], - pdata->nr_parts[0]); + ret = mtd_device_register(mtd, pdata->parts, pdata->nr_parts); else ret = mtd_device_register(mtd, NULL, 0); if (ret) { diff --git a/include/linux/platform_data/mtd-nand-pxa3xx.h b/include/linux/platform_data/mtd-nand-pxa3xx.h index b42ad83cbc20..4fd0f592a2d2 100644 --- a/include/linux/platform_data/mtd-nand-pxa3xx.h +++ b/include/linux/platform_data/mtd-nand-pxa3xx.h @@ -6,41 +6,22 @@ #include /* - * Current pxa3xx_nand controller has two chip select which - * both be workable. - * - * Notice should be taken that: - * When you want to use this feature, you should not enable the - * keep configuration feature, for two chip select could be - * attached with different nand chip. The different page size - * and timing requirement make the keep configuration impossible. + * Current pxa3xx_nand controller has two chip select which both be workable but + * historically all platforms remaining on platform data used only one. Switch + * to device tree if you need more. */ - -/* The max num of chip select current support */ -#define NUM_CHIP_SELECT (2) struct pxa3xx_nand_platform_data { - - /* the data flash bus is shared between the Static Memory - * Controller and the Data Flash Controller, the arbiter - * controls the ownership of the bus - */ - int enable_arbiter; - - /* allow platform code to keep OBM/bootloader defined NFC config */ - int keep_config; - - /* indicate how many chip selects will be used */ - int num_cs; - - /* use an flash-based bad block table */ - bool flash_bbt; - - /* requested ECC strength and ECC step size */ + /* Keep OBM/bootloader NFC timing configuration */ + bool keep_config; + /* Use a flash-based bad block table */ + bool flash_bbt; + /* Requested ECC strength and ECC step size */ int ecc_strength, ecc_step_size; - - const struct mtd_partition *parts[NUM_CHIP_SELECT]; - unsigned int nr_parts[NUM_CHIP_SELECT]; + /* Partitions */ + const struct mtd_partition *parts; + unsigned int nr_parts; }; extern void pxa3xx_set_nand_info(struct pxa3xx_nand_platform_data *info); + #endif /* __ASM_ARCH_PXA3XX_NAND_H */ -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html