at86rf230: Allow slow GPIO pins for "rstn"

Driver code never touches "rstn" signal in atomic context, so there's
no need to implicitly put such restriction on it by using gpio_set_value
to manipulate it. Replace gpio_set_value to gpio_set_value_cansleep to
fix that.

As a an example of where such restriction might be inconvenient,
consider a hardware design where "rstn" is connected to a pin of I2C/SPI
GPIO expander chip.

Cc: Chris Healy <cphealy@gmail.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 46d53a6c8cf868a18ab82a27e730c36e1bc6fb0b..76ba7ecfe14290c7800879c0f80b284f54299ca7 100644 (file)
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -1715,9 +1715,9 @@ static int at86rf230_probe(struct spi_device *spi)
        /* Reset */
        if (gpio_is_valid(rstn)) {
                udelay(1);
-               gpio_set_value(rstn, 0);
+               gpio_set_value_cansleep(rstn, 0);
                udelay(1);
-               gpio_set_value(rstn, 1);
+               gpio_set_value_cansleep(rstn, 1);
                usleep_range(120, 240);
        }