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authorWolfram Sang <wsa+renesas@sang-engineering.com>2019-04-03 14:40:19 +0200
committerWolfram Sang <wsa@the-dreams.de>2019-04-16 13:08:17 +0200
commite155e38830194f59fe26310421bba70f875cab25 (patch)
treee65d7f5dd8be0ab2a1ad570a032c8b5988399db3 /drivers/i2c
parent8927fbf481248954ca1fc5e652171936b94905ac (diff)
downloadlinux-e155e38830194f59fe26310421bba70f875cab25.tar.bz2
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-gpio.c2
1 files changed, 2 insertions, 0 deletions
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;