From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Christophe Kerello <christophe.kerello@st.com>
Cc: <richard@nod.at>, <vigneshr@ti.com>, <lee.jones@linaro.org>,
<robh+dt@kernel.org>, <mark.rutland@arm.com>, <tony@atomide.com>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<devicetree@vger.kernel.org>, <marex@denx.de>
Subject: Re: [PATCH v2 06/12] mtd: rawnand: stm32_fmc2: use FMC2_TIMEOUT_MS for timeouts
Date: Mon, 27 Apr 2020 20:22:12 +0200 [thread overview]
Message-ID: <20200427202212.0235d987@xps13> (raw)
In-Reply-To: <1586966256-29548-7-git-send-email-christophe.kerello@st.com>
Hi Christophe,
Christophe Kerello <christophe.kerello@st.com> wrote on Wed, 15 Apr
2020 17:57:30 +0200:
> This patch removes the constant FMC2_TIMEOUT_US.
> FMC2_TIMEOUT_MS is set to 5 seconds and this constant is used
> each time that we need to wait (except when the timeout value
> is set by the framework)
>
> Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
> ---
> drivers/mtd/nand/raw/stm32_fmc2_nand.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
> index ab53314..f159c39 100644
> --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
> +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
> @@ -37,8 +37,7 @@
> /* Max ECC buffer length */
> #define FMC2_MAX_ECC_BUF_LEN (FMC2_BCHDSRS_LEN * FMC2_MAX_SG)
>
> -#define FMC2_TIMEOUT_US 1000
> -#define FMC2_TIMEOUT_MS 1000
> +#define FMC2_TIMEOUT_MS 5000
>
> /* Timings */
> #define FMC2_THIZ 1
> @@ -525,9 +524,9 @@ static int stm32_fmc2_ham_calculate(struct nand_chip *chip, const u8 *data,
> u32 sr, heccr;
> int ret;
>
> - ret = readl_relaxed_poll_timeout(fmc2->io_base + FMC2_SR,
> - sr, sr & FMC2_SR_NWRF, 10,
> - FMC2_TIMEOUT_MS);
> + ret = readl_relaxed_poll_timeout_atomic(fmc2->io_base + FMC2_SR,
> + sr, sr & FMC2_SR_NWRF, 1,
> + 1000 * FMC2_TIMEOUT_MS);
Is the _atomic suffix needed here? If yes it would deserve a separate
patch with Fixes/Stable tags.
> if (ret) {
> dev_err(fmc2->dev, "ham timeout\n");
> return ret;
> @@ -1315,7 +1314,7 @@ static int stm32_fmc2_waitrdy(struct nand_chip *chip, unsigned long timeout_ms)
> /* Check if there is no pending requests to the NAND flash */
> if (readl_relaxed_poll_timeout_atomic(fmc2->io_base + FMC2_SR, sr,
> sr & FMC2_SR_NWRF, 1,
> - FMC2_TIMEOUT_US))
> + 1000 * FMC2_TIMEOUT_MS))
> dev_warn(fmc2->dev, "Waitrdy timeout\n");
>
> /* Wait tWB before R/B# signal is low */
You change the timeouts from 1ms to 5s.
Maybe 5s is a little bit too much IMHO but we don't really care as this
is a timeout. However 1ms is tight. If you are changing this value
because it triggers error (eg. when the machine is loaded), then it is
a fix and should appear like it.
Thanks,
Miquèl
next prev parent reply other threads:[~2020-04-27 18:22 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 15:57 [PATCH v2 00/12] add STM32 FMC2 controller drivers Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 01/12] dt-bindings: mfd: stm32-fmc2: add STM32 FMC2 controller documentation Christophe Kerello
2020-04-28 15:28 ` Rob Herring
2020-04-29 9:35 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 02/12] mfd: stm32-fmc2: add STM32 FMC2 controller driver Christophe Kerello
2020-04-24 7:45 ` Lee Jones
2020-04-24 10:27 ` Marek Vasut
2020-04-24 10:50 ` Lee Jones
2020-04-24 11:06 ` Marek Vasut
2020-04-24 11:47 ` Christophe Kerello
2020-04-24 14:50 ` Lee Jones
2020-04-24 15:14 ` Boris Brezillon
2020-04-24 16:42 ` Christophe Kerello
2020-04-24 17:22 ` Boris Brezillon
2020-04-24 17:34 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 03/12] bus: stm32-fmc2-ebi: add STM32 FMC2 EBI " Christophe Kerello
2020-04-16 19:53 ` Boris Brezillon
2020-04-17 15:29 ` Christophe Kerello
2020-04-17 15:31 ` Marek Vasut
2020-04-17 15:41 ` Boris Brezillon
2020-04-17 15:44 ` Marek Vasut
2020-04-15 15:57 ` [PATCH v2 04/12] mtd: rawnand: stm32_fmc2: manage all errors cases at probe time Christophe Kerello
2020-04-27 17:47 ` Miquel Raynal
2020-04-27 17:59 ` Marek Vasut
2020-04-27 18:08 ` Miquel Raynal
2020-04-27 19:46 ` Marek Vasut
2020-04-27 20:08 ` Miquel Raynal
2020-04-27 20:10 ` Marek Vasut
2020-04-29 8:00 ` Christophe Kerello
2020-04-29 9:07 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 05/12] mtd: rawnand: stm32_fmc2: remove useless inline comments Christophe Kerello
2020-04-27 17:48 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 06/12] mtd: rawnand: stm32_fmc2: use FMC2_TIMEOUT_MS for timeouts Christophe Kerello
2020-04-27 18:22 ` Miquel Raynal [this message]
2020-04-29 9:27 ` Christophe Kerello
2020-04-29 9:35 ` Miquel Raynal
2020-04-29 9:41 ` Christophe Kerello
2020-04-29 10:06 ` Miquel Raynal
2020-04-29 10:13 ` Christophe Kerello
2020-04-29 10:27 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 07/12] mtd: rawnand: stm32_fmc2: cleanup Christophe Kerello
2020-04-27 18:33 ` Miquel Raynal
2020-04-29 9:31 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 08/12] mtd: rawnand: stm32_fmc2: use FIELD_PREP/FIELD_GET macros Christophe Kerello
2020-04-16 19:45 ` Boris Brezillon
2020-04-27 18:50 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 09/12] mtd: rawnand: stm32_fmc2: move all registers Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 10/12] mtd: rawnand: stm32_fmc2: use regmap APIs Christophe Kerello
2020-04-27 18:52 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 11/12] mtd: rawnand: stm32_fmc2: use stm32_fmc2 structure in nfc controller Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 12/12] mtd: rawnand: stm32_fmc2: add new MP1 compatible string Christophe Kerello
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