From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: [PATCH 12/12] i2c: gpio: flag atomic capability if possible Date: Wed, 3 Apr 2019 14:40:19 +0200 Message-ID: <20190403124019.8947-13-wsa+renesas@sang-engineering.com> References: <20190403124019.8947-1-wsa+renesas@sang-engineering.com> Return-path: In-Reply-To: <20190403124019.8947-1-wsa+renesas@sang-engineering.com> Sender: linux-kernel-owner@vger.kernel.org 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 , Stefan Lengfeld , linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org, Linus Walleij , Andy Shevchenko , Wolfram Sang List-Id: linux-i2c@vger.kernel.org If switching GPIOs does not sleep, then we can support atomic transfers. Signed-off-by: Wolfram Sang --- 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