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i2c: gpio: flag atomic capability if possible 

If switching GPIOs does not sleep, then we can support atomic transfers.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
hifive-unleashed-5.2
Wolfram Sang 2019-04-03 14:40:19 +02:00 committed by Wolfram Sang
parent 8927fbf481
commit e155e38830
1 changed files with 2 additions and 0 deletions
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2
drivers/i2c/busses/i2c-gpio.c
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@ -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;