From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
To: linux-kernel@vger.kernel.org
Cc: Dario Binacchi <dario.binacchi@amarulasolutions.com>,
Michael Trimarchi <michael@amarulasolutions.com>,
Han Xu <han.xu@nxp.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
linux-mtd@lists.infradead.org
Subject: [RFC PATCH 2/4] mtd: rawnand: gpmi: support fast edo timings for mx28
Date: Fri, 17 Dec 2021 16:55:10 +0100 [thread overview]
Message-ID: <20211217155512.1877408-3-dario.binacchi@amarulasolutions.com> (raw)
In-Reply-To: <20211217155512.1877408-1-dario.binacchi@amarulasolutions.com>
In the mx28 reference manual there are examples of how to set up the
GPMI controller to support fast NAND EDO timing.
This patch has been tested on a 2048/64 byte NAND (Micron MT29F2G08ABAEAH4).
Kernel mtd tests:
- mtd_nandbiterrs
- mtd_nandecctest
- mtd_oobtest
- mtd_pagetest
- mtd_readtest
- mtd_speedtest
- mtd_stresstest
- mtd_subpagetest
- mtd_torturetest [cycles_count = 10000000]
run without errors.
Before this patch (mode 0):
---------------------------
eraseblock write speed is 2098 KiB/s
eraseblock read speed is 2680 KiB/s
page write speed is 1689 KiB/s
page read speed is 2522 KiB/s
2 page write speed is 1899 KiB/s
2 page read speed is 2579 KiB/s
erase speed is 128000 KiB/s
2x multi-block erase speed is 73142 KiB/s
4x multi-block erase speed is 204800 KiB/s
8x multi-block erase speed is 256000 KiB/s
16x multi-block erase speed is 256000 KiB/s
32x multi-block erase speed is 256000 KiB/s
64x multi-block erase speed is 256000 KiB/s
After this patch (mode 5):
-------------------------
eraseblock write speed is 3390 KiB/s
eraseblock read speed is 5688 KiB/s
page write speed is 2680 KiB/s
page read speed is 4876 KiB/s
2 page write speed is 2909 KiB/s
2 page read speed is 5224 KiB/s
erase speed is 170666 KiB/s
2x multi-block erase speed is 204800 KiB/s
4x multi-block erase speed is 256000 KiB/s
8x multi-block erase speed is 256000 KiB/s
16x multi-block erase speed is 256000 KiB/s
32x multi-block erase speed is 256000 KiB/s
64x multi-block erase speed is 256000 KiB/s
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
---
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 65bcd1c548d2..fd935e893daf 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -772,8 +772,8 @@ static int gpmi_setup_interface(struct nand_chip *chip, int chipnr,
if (IS_ERR(sdr))
return PTR_ERR(sdr);
- /* Only MX6 GPMI controller can reach EDO timings */
- if (sdr->tRC_min <= 25000 && !GPMI_IS_MX6(this))
+ /* Only MX28/MX6 GPMI controller can reach EDO timings */
+ if (sdr->tRC_min <= 25000 && !GPMI_IS_MX28(this) && !GPMI_IS_MX6(this))
return -ENOTSUPP;
/* Stop here if this call was just a check */
--
2.32.0
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next prev parent reply other threads:[~2021-12-17 16:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 15:55 [RFC PATCH 0/4] Fix and improve gpmi nand on mx28 Dario Binacchi
2021-12-17 15:55 ` Dario Binacchi [this message]
2021-12-22 16:08 ` [RFC PATCH 2/4] mtd: rawnand: gpmi: support fast edo timings for mx28 Miquel Raynal
2021-12-17 15:55 ` [RFC PATCH 3/4] mtd: rawnand: gpmi: fix controller timings setting Dario Binacchi
2021-12-22 16:10 ` Miquel Raynal
2021-12-17 15:55 ` [RFC PATCH 4/4] mtd: rawnand: gpmi: validate controller clock rate Dario Binacchi
2021-12-22 16:23 ` Miquel Raynal
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