From: Roman Tereshonkov Date: Mon, 11 Oct 2010 11:47:32 +0000 (+0300) Subject: mtd: onenand: fix 4KiB page onenand chip recognition X-Git-Tag: firefly_0821_release~7613^2~3545^2~24 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=edb44b9b9cbff71f6aa9bebc384ee1896c8bfc2c;p=firefly-linux-kernel-4.4.55.git mtd: onenand: fix 4KiB page onenand chip recognition For 4Gib non-DDP chip it does not follow that it is always 4KiB page chip. The number of data buffers is checked and if it is equal to 1 we suppose that it is 4KiB page onenand chip. Signed-off-by: Roman Tereshonkov Acked-by: Kyungmin Park Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 33e0dbb0a96d..6b3a875647c9 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -3365,18 +3365,19 @@ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, static void onenand_check_features(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; - unsigned int density, process; + unsigned int density, process, numbufs; /* Lock scheme depends on density and process */ density = onenand_get_density(this->device_id); process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; + numbufs = this->read_word(this->base + ONENAND_REG_NUM_BUFFERS) >> 8; /* Lock scheme */ switch (density) { case ONENAND_DEVICE_DENSITY_4Gb: if (ONENAND_IS_DDP(this)) this->options |= ONENAND_HAS_2PLANE; - else + else if (numbufs == 1) this->options |= ONENAND_HAS_4KB_PAGE; case ONENAND_DEVICE_DENSITY_2Gb: