From: Wolfram Sang <wsa@the-dreams.de>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: linux@rempel-privat.de, kernel@pengutronix.de,
shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com,
linux-imx@nxp.com, stefan@agner.ch, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Stefan Lengfeld <contact@stefanchrist.eu>,
Oleksij Rempel <o.rempel@pengutronix.de>
Subject: Re: [PATCH] i2c: imx: implement master_xfer_atomic callback
Date: Sat, 22 Feb 2020 12:55:32 +0100 [thread overview]
Message-ID: <20200222115532.GE1716@kunai> (raw)
In-Reply-To: <20200120093650.12911-1-m.felsch@pengutronix.de>
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On Mon, Jan 20, 2020 at 10:36:50AM +0100, Marco Felsch wrote:
> From: Stefan Lengfeld <contact@stefanchrist.eu>
>
> Rework the read and write code paths in the driver to support operation
> in atomic contexts. To achieve this, the driver must not rely on IRQs
> and not call schedule(), e.g. via a sleep routine, in these cases.
>
> With this patch the driver supports normal operation, DMA transfers and
> now the polling mode or also called sleep-free or IRQ-less operation. It
> makes the code not simpler or easier to read, but atomic I2C transfers
> are needed on some hardware configurations, e.g. to trigger reboots on
> an external PMIC chip.
>
> Signed-off-by: Stefan Lengfeld <contact@stefanchrist.eu>
> [m.felsch@pengutronix.de: integrate https://patchwork.ozlabs.org/patch/1085943/ review feedback]
> [m.felsch@pengutronix.de: adapt commit message]
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Applied to for-next, thanks!
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: shawnguo@kernel.org, s.hauer@pengutronix.de, stefan@agner.ch,
linux@rempel-privat.de, Oleksij Rempel <o.rempel@pengutronix.de>,
linux-imx@nxp.com, kernel@pengutronix.de,
Stefan Lengfeld <contact@stefanchrist.eu>,
festevam@gmail.com, linux-arm-kernel@lists.infradead.org,
linux-i2c@vger.kernel.org
Subject: Re: [PATCH] i2c: imx: implement master_xfer_atomic callback
Date: Sat, 22 Feb 2020 12:55:32 +0100 [thread overview]
Message-ID: <20200222115532.GE1716@kunai> (raw)
In-Reply-To: <20200120093650.12911-1-m.felsch@pengutronix.de>
[-- Attachment #1.1: Type: text/plain, Size: 1025 bytes --]
On Mon, Jan 20, 2020 at 10:36:50AM +0100, Marco Felsch wrote:
> From: Stefan Lengfeld <contact@stefanchrist.eu>
>
> Rework the read and write code paths in the driver to support operation
> in atomic contexts. To achieve this, the driver must not rely on IRQs
> and not call schedule(), e.g. via a sleep routine, in these cases.
>
> With this patch the driver supports normal operation, DMA transfers and
> now the polling mode or also called sleep-free or IRQ-less operation. It
> makes the code not simpler or easier to read, but atomic I2C transfers
> are needed on some hardware configurations, e.g. to trigger reboots on
> an external PMIC chip.
>
> Signed-off-by: Stefan Lengfeld <contact@stefanchrist.eu>
> [m.felsch@pengutronix.de: integrate https://patchwork.ozlabs.org/patch/1085943/ review feedback]
> [m.felsch@pengutronix.de: adapt commit message]
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Applied to for-next, thanks!
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next prev parent reply other threads:[~2020-02-22 11:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 9:36 [PATCH] i2c: imx: implement master_xfer_atomic callback Marco Felsch
2020-01-20 9:36 ` Marco Felsch
2020-01-20 10:03 ` Stefan Agner
2020-01-20 10:03 ` Stefan Agner
2020-01-20 10:39 ` Marco Felsch
2020-01-20 10:39 ` Marco Felsch
2020-01-26 17:53 ` Stefan Lengfeld
2020-01-26 17:53 ` Stefan Lengfeld
2020-02-18 14:04 ` Marco Felsch
2020-02-18 14:04 ` Marco Felsch
2020-02-22 11:55 ` Wolfram Sang [this message]
2020-02-22 11:55 ` Wolfram Sang
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