From: Masahiro Yamada <yamada.masahiro@socionext.com>
To: linux-mtd@lists.infradead.org
Cc: laurent.monat@idquantique.com,
thorsten.christiansson@idquantique.com,
Enrico Jorns <ejo@pengutronix.de>,
Jason Roberts <jason.e.roberts@intel.com>,
Artem Bityutskiy <artem.bityutskiy@linux.intel.com>,
Dinh Nguyen <dinguyen@kernel.org>,
Boris Brezillon <boris.brezillon@free-electrons.com>,
Marek Vasut <marek.vasut@gmail.com>,
Brian Norris <computersforpeace@gmail.com>,
Graham Moore <grmoore@opensource.altera.com>,
David Woodhouse <dwmw2@infradead.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Chuanxiao Dong <chuanxiao.dong@intel.com>,
Jassi Brar <jaswinder.singh@linaro.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
linux-kernel@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Cyrille Pitchen <cyrille.pitchen@atmel.com>
Subject: [PATCH v2 24/53] mtd: nand: denali: remove meaningless writes to read-only registers
Date: Wed, 22 Mar 2017 23:07:31 +0900 [thread overview]
Message-ID: <1490191680-14481-25-git-send-email-yamada.masahiro@socionext.com> (raw)
In-Reply-To: <1490191680-14481-1-git-send-email-yamada.masahiro@socionext.com>
The write accesses to LOGICAL_PAGE_{DATA,SPARE}_SIZE have no effect
because the Denali User's Guide says these registers are read-only.
The hardware automatically multiplies the main/spare size by the
number of devices and update LOGICAL_PAGE_{DATA,SPARE}_SIZE.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
Changes in v2: None
drivers/mtd/nand/denali.c | 16 ----------------
1 file changed, 16 deletions(-)
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 3da0a0e..5e89709 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -342,8 +342,6 @@ static void get_samsung_nand_para(struct denali_nand_info *denali,
static void get_toshiba_nand_para(struct denali_nand_info *denali)
{
- uint32_t tmp;
-
/*
* Workaround to fix a controller bug which reports a wrong
* spare area size for some kind of Toshiba NAND device
@@ -351,10 +349,6 @@ static void get_toshiba_nand_para(struct denali_nand_info *denali)
if ((ioread32(denali->flash_reg + DEVICE_MAIN_AREA_SIZE) == 4096) &&
(ioread32(denali->flash_reg + DEVICE_SPARE_AREA_SIZE) == 64)) {
iowrite32(216, denali->flash_reg + DEVICE_SPARE_AREA_SIZE);
- tmp = ioread32(denali->flash_reg + DEVICES_CONNECTED) *
- ioread32(denali->flash_reg + DEVICE_SPARE_AREA_SIZE);
- iowrite32(tmp,
- denali->flash_reg + LOGICAL_PAGE_SPARE_SIZE);
#if SUPPORT_15BITECC
iowrite32(15, denali->flash_reg + ECC_CORRECTION);
#elif SUPPORT_8BITECC
@@ -366,22 +360,12 @@ static void get_toshiba_nand_para(struct denali_nand_info *denali)
static void get_hynix_nand_para(struct denali_nand_info *denali,
uint8_t device_id)
{
- uint32_t main_size, spare_size;
-
switch (device_id) {
case 0xD5: /* Hynix H27UAG8T2A, H27UBG8U5A or H27UCG8VFA */
case 0xD7: /* Hynix H27UDG8VEM, H27UCG8UDM or H27UCG8V5A */
iowrite32(128, denali->flash_reg + PAGES_PER_BLOCK);
iowrite32(4096, denali->flash_reg + DEVICE_MAIN_AREA_SIZE);
iowrite32(224, denali->flash_reg + DEVICE_SPARE_AREA_SIZE);
- main_size = 4096 *
- ioread32(denali->flash_reg + DEVICES_CONNECTED);
- spare_size = 224 *
- ioread32(denali->flash_reg + DEVICES_CONNECTED);
- iowrite32(main_size,
- denali->flash_reg + LOGICAL_PAGE_DATA_SIZE);
- iowrite32(spare_size,
- denali->flash_reg + LOGICAL_PAGE_SPARE_SIZE);
iowrite32(0, denali->flash_reg + DEVICE_WIDTH);
#if SUPPORT_15BITECC
iowrite32(15, denali->flash_reg + ECC_CORRECTION);
--
2.7.4
prev parent reply other threads:[~2017-03-22 14:20 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-22 14:07 [PATCH v2 00/53] mtd: nand: denali: 2nd round of Denali NAND IP patch bomb Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 01/53] mtd: nand: allow to set only one of ECC size and ECC strength from DT Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 02/53] mtd: nand: use read_oob() instead of cmdfunc() for bad block check Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 03/53] mtd: nand: denali: remove unused CONFIG option and macros Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 04/53] mtd: nand: denali: remove redundant define of BANK(x) Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 05/53] mtd: nand: denali: remove more unused struct members Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 06/53] mtd: nand: denali: fix comment of denali_nand_info::flash_mem Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 07/53] mtd: nand: denali: consolidate INTR_STATUS__* and INTR_EN__* macros Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 08/53] mtd: nand: denali: introduce capability flag Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 09/53] mtd: nand: denali: use int where no reason to use fixed width variable Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 10/53] mtd: nand: denali: fix erased page checking Masahiro Yamada
2017-03-22 20:36 ` Boris Brezillon
2017-03-23 5:15 ` Masahiro Yamada
2017-03-23 8:03 ` Boris Brezillon
2017-03-22 20:56 ` Boris Brezillon
2017-03-23 5:04 ` Masahiro Yamada
2017-03-23 7:56 ` Boris Brezillon
2017-03-24 2:43 ` Masahiro Yamada
2017-03-24 8:06 ` Boris Brezillon
2017-03-22 14:07 ` [PATCH v2 11/53] mtd: nand: denali: fix bitflips calculation in handle_ecc() Masahiro Yamada
2017-03-22 20:57 ` Boris Brezillon
2017-03-23 7:02 ` Masahiro Yamada
2017-03-23 8:12 ` Boris Brezillon
2017-03-22 14:07 ` [PATCH v2 12/53] mtd: nand: denali: support HW_ECC_FIXUP capability Masahiro Yamada
2017-03-22 21:09 ` Boris Brezillon
2017-03-23 7:06 ` Masahiro Yamada
2017-03-23 8:16 ` Boris Brezillon
2017-03-22 21:12 ` Boris Brezillon
2017-03-23 7:05 ` Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 13/53] mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 14/53] mtd: nand: denali: support 64bit capable DMA engine Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 15/53] mtd: nand: denali_dt: remove dma-mask DT property Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 16/53] mtd: nand: denali_dt: use pdev instead of ofdev for platform_device Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 17/53] mtd: nand: denali: allow to override revision number Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 18/53] mtd: nand: denali: use nand_chip to hold frequently accessed data Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 19/53] mtd: nand: denali: call nand_set_flash_node() to set DT node Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 20/53] mtd: nand: denali: do not set mtd->name Masahiro Yamada
2017-03-27 15:31 ` Boris Brezillon
2017-03-28 21:32 ` Masahiro Yamada
2017-03-28 21:40 ` Boris Brezillon
2017-03-29 1:19 ` Masahiro Yamada
2017-03-29 7:19 ` Boris Brezillon
2017-03-29 11:30 ` Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 21/53] mtd: nand: denali: move multi device fixup code to a helper function Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 22/53] mtd: nand: denali: simplify multi device fixup code Masahiro Yamada
2017-03-22 14:07 ` [PATCH v2 23/53] mtd: nand: denali: set DEVICES_CONNECTED 1 if not set Masahiro Yamada
2017-03-22 14:07 ` Masahiro Yamada [this message]
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