From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Peter Rosin <peda@axentia.se>,
Stefan Lengfeld <contact@stefanchrist.eu>,
linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [PATCH 12/12] i2c: gpio: flag atomic capability if possible
Date: Wed, 3 Apr 2019 14:40:19 +0200 [thread overview]
Message-ID: <20190403124019.8947-13-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20190403124019.8947-1-wsa+renesas@sang-engineering.com>
If switching GPIOs does not sleep, then we can support atomic transfers.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/i2c/busses/i2c-gpio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
index bba5c4627de3..9684a0ac2a6d 100644
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -413,6 +413,8 @@ static int i2c_gpio_probe(struct platform_device *pdev)
if (gpiod_cansleep(priv->sda) || gpiod_cansleep(priv->scl))
dev_warn(dev, "Slow GPIO pins might wreak havoc into I2C/SMBus bus timing");
+ else
+ bit_data->can_do_atomic = true;
bit_data->setsda = i2c_gpio_setsda_val;
bit_data->setscl = i2c_gpio_setscl_val;
--
2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
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,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
linux-tegra@vger.kernel.org,
Stefan Lengfeld <contact@stefanchrist.eu>,
linux-omap@vger.kernel.org, Peter Rosin <peda@axentia.se>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 12/12] i2c: gpio: flag atomic capability if possible
Date: Wed, 3 Apr 2019 14:40:19 +0200 [thread overview]
Message-ID: <20190403124019.8947-13-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20190403124019.8947-1-wsa+renesas@sang-engineering.com>
If switching GPIOs does not sleep, then we can support atomic transfers.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/i2c/busses/i2c-gpio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
index bba5c4627de3..9684a0ac2a6d 100644
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -413,6 +413,8 @@ static int i2c_gpio_probe(struct platform_device *pdev)
if (gpiod_cansleep(priv->sda) || gpiod_cansleep(priv->scl))
dev_warn(dev, "Slow GPIO pins might wreak havoc into I2C/SMBus bus timing");
+ else
+ bit_data->can_do_atomic = true;
bit_data->setsda = i2c_gpio_setsda_val;
bit_data->setscl = i2c_gpio_setscl_val;
--
2.11.0
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next prev parent reply other threads:[~2019-04-03 12:40 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
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 ` Wolfram Sang [this message]
2019-04-03 12:40 ` [PATCH 12/12] i2c: gpio: flag atomic capability if possible 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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