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SubjectRe: [PATCH 12/12] i2c: gpio: flag atomic capability if possible
On Wed, Apr 3, 2019 at 3:42 PM Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
>
> If switching GPIOs does not sleep, then we can support atomic transfers.
>

Reviewed-by Andy Shevchenko <andriy.shevchenko@linux.intel.com>


> 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
>


--
With Best Regards,
Andy Shevchenko

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