From: Stefan Lengfeld <contact@stefanchrist.eu>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: linux-i2c@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Peter Rosin <peda@axentia.se>,
linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH 03/12] i2c: core: introduce callbacks for atomic transfers
Date: Mon, 15 Apr 2019 23:57:48 +0200 [thread overview]
Message-ID: <20190415215748.e6jrii25nqliy7me@porty> (raw)
In-Reply-To: <20190403124019.8947-4-wsa+renesas@sang-engineering.com>
Hi Wolfram,
On Wed, Apr 03, 2019 at 02:40:10PM +0200, Wolfram Sang wrote:
> We had the request to access devices very late when interrupts are not
> available anymore multiple times now. Mostly to prepare shutdown or
> reboot. Allow adapters to specify a specific callback for this case.
> Note that we fall back to the generic {master|smbus}_xfer callback if
> this new atomic one is not present. This is intentional to preserve the
> previous behaviour and avoid regressions. Because there are drivers not
> using interrupts or because it might have worked "accidently" before.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Stefan Lengfeld <contact@stefanchrist.eu>
Kind regards,
Stefan
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Lengfeld <contact@stefanchrist.eu>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-omap@vger.kernel.org, Peter Rosin <peda@axentia.se>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 03/12] i2c: core: introduce callbacks for atomic transfers
Date: Mon, 15 Apr 2019 23:57:48 +0200 [thread overview]
Message-ID: <20190415215748.e6jrii25nqliy7me@porty> (raw)
In-Reply-To: <20190403124019.8947-4-wsa+renesas@sang-engineering.com>
Hi Wolfram,
On Wed, Apr 03, 2019 at 02:40:10PM +0200, Wolfram Sang wrote:
> We had the request to access devices very late when interrupts are not
> available anymore multiple times now. Mostly to prepare shutdown or
> reboot. Allow adapters to specify a specific callback for this case.
> Note that we fall back to the generic {master|smbus}_xfer callback if
> this new atomic one is not present. This is intentional to preserve the
> previous behaviour and avoid regressions. Because there are drivers not
> using interrupts or because it might have worked "accidently" before.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Stefan Lengfeld <contact@stefanchrist.eu>
Kind regards,
Stefan
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next prev parent reply other threads:[~2019-04-15 21:57 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 12:40 [PATCH 00/12] i2c: core: introduce atomic transfers Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` [PATCH 01/12] i2c: remove use of in_atomic() Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-15 12:40 ` Andy Shevchenko
2019-04-15 12:40 ` Andy Shevchenko
2019-04-15 21:55 ` Stefan Lengfeld
2019-04-15 21:55 ` Stefan Lengfeld
2019-04-15 21:55 ` Stefan Lengfeld
2019-04-16 10:48 ` Wolfram Sang
2019-04-16 10:48 ` Wolfram Sang
2019-04-03 12:40 ` [PATCH 02/12] i2c: core: use I2C locking behaviour also for SMBUS Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-15 12:39 ` Andy Shevchenko
2019-04-15 12:39 ` Andy Shevchenko
2019-04-15 12:39 ` Andy Shevchenko
2019-04-03 12:40 ` [PATCH 03/12] i2c: core: introduce callbacks for atomic transfers Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-15 12:39 ` Andy Shevchenko
2019-04-15 12:39 ` Andy Shevchenko
2019-04-15 21:57 ` Stefan Lengfeld [this message]
2019-04-15 21:57 ` Stefan Lengfeld
2019-04-03 12:40 ` [PATCH 04/12] i2c: mux: populate the new *_atomic callbacks Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 15:17 ` Peter Rosin
2019-04-03 15:17 ` Peter Rosin
2019-04-03 15:17 ` Peter Rosin
2019-04-15 12:04 ` Wolfram Sang
2019-04-15 12:04 ` Wolfram Sang
2019-04-15 12:04 ` Wolfram Sang
2019-04-15 12:44 ` Andy Shevchenko
2019-04-15 12:44 ` Andy Shevchenko
2019-04-03 12:40 ` [PATCH 05/12] i2c: demux: handle the new atomic callbacks Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-15 12:37 ` Andy Shevchenko
2019-04-15 12:37 ` Andy Shevchenko
2019-04-03 12:40 ` [PATCH 06/12] i2c: omap: Add the master_xfer_irqless hook Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-15 22:05 ` Stefan Lengfeld
2019-04-15 22:05 ` Stefan Lengfeld
2019-04-16 10:52 ` Wolfram Sang
2019-04-16 10:52 ` Wolfram Sang
2019-04-03 12:40 ` [PATCH 07/12] i2c: tegra-bpmp: convert to use new atomic callbacks Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` [PATCH 08/12] i2c: ocores: refactor setup for polling Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-05 15:09 ` Peter Korsgaard
2019-04-05 15:09 ` Peter Korsgaard
2019-04-05 19:00 ` Andrew Lunn
2019-04-05 19:00 ` Andrew Lunn
2019-04-03 12:40 ` [PATCH 09/12] i2c: ocores: enable atomic xfers Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-05 19:20 ` Andrew Lunn
2019-04-05 19:20 ` Andrew Lunn
2019-04-03 12:40 ` [PATCH 10/12] i2c: stu300: use xfer_atomic callback to bail out early Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-04 15:38 ` Linus Walleij
2019-04-04 15:38 ` Linus Walleij
2019-04-03 12:40 ` [PATCH 11/12] i2c: algo: bit: add flag to whitelist atomic transfers Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-03 12:40 ` [PATCH 12/12] i2c: gpio: flag atomic capability if possible Wolfram Sang
2019-04-03 12:40 ` Wolfram Sang
2019-04-04 15:40 ` Linus Walleij
2019-04-04 15:40 ` Linus Walleij
2019-04-15 12:38 ` Andy Shevchenko
2019-04-15 12:38 ` Andy Shevchenko
2019-04-03 13:15 ` [PATCH 00/12] i2c: core: introduce atomic transfers Andy Shevchenko
2019-04-03 13:15 ` Andy Shevchenko
2019-04-15 12:06 ` Wolfram Sang
2019-04-15 12:06 ` Wolfram Sang
2019-04-15 12:35 ` Andy Shevchenko
2019-04-15 12:35 ` Andy Shevchenko
2019-04-15 12:48 ` Andy Shevchenko
2019-04-15 12:48 ` Andy Shevchenko
2019-04-15 12:50 ` Wolfram Sang
2019-04-15 12:50 ` Wolfram Sang
2019-04-15 12:10 ` Wolfram Sang
2019-04-15 12:10 ` Wolfram Sang
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