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net: phy: allow for reset line to be tied to a sleepy GPIO controller

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mdio_device_reset() makes use of the atomic-pretending API flavor for
handling the PHY reset GPIO line.

I found no hint that mdio_device_reset() is called from atomic context
and indeed it uses usleep_range() since long time, so I would assume that
it is OK to sleep there.

This patch switch to gpiod_set_value_cansleep() in mdio_device_reset().
This is relevant if e.g. the PHY reset line is tied to a I2C GPIO
controller.

This has been tested on a ZynqMP board running an upstream 4.19 kernel and
then hand-ported on current kernel tree.

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrea Merello 2019-10-04 15:53:32 +02:00 committed by David S. Miller
parent b406472b5a
commit ea977d19d9
1 changed files with 1 additions and 1 deletions
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2
drivers/net/phy/mdio_device.c
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@ -121,7 +121,7 @@ void mdio_device_reset(struct mdio_device *mdiodev, int value)
return;
if (mdiodev->reset_gpio)
gpiod_set_value(mdiodev->reset_gpio, value);
gpiod_set_value_cansleep(mdiodev->reset_gpio, value);
if (mdiodev->reset_ctrl) {
if (value)