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at86rf230: Allow slow GPIO pins for "rstn"

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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>
This commit is contained in:
Andrey Smirnov 2016-12-18 15:25:33 -08:00 committed by Marcel Holtmann
parent 5eb35a6cce
commit f301606934
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ieee802154/at86rf230.c
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@ -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);
}