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phy: add support for a reset-gpio specification

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The framework only asserts (for now) that the reset gpio is not active.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Uwe Kleine-König 2016-05-12 12:00:33 +02:00 committed by David S. Miller
parent f23e0f6507
commit da47b45720
2 changed files with 11 additions and 0 deletions
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3
Documentation/devicetree/bindings/net/phy.txt
View File

@ -35,6 +35,8 @@ Optional Properties:
- broken-turn-around: If set, indicates the PHY device does not correctly
release the turn around line low at the end of a MDIO transaction.
- reset-gpios: Reference to a GPIO used to reset the phy.
Example:
ethernet-phy@0 {
@ -42,4 +44,5 @@ ethernet-phy@0 {
interrupt-parent = <40000>;
interrupts = <35 1>;
reg = <0>;
reset-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
};

8
drivers/net/phy/phy_device.c
View File

@ -34,6 +34,7 @@
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <asm/irq.h>
@ -1570,9 +1571,16 @@ static int phy_probe(struct device *dev)
struct device_driver *drv = phydev->mdio.dev.driver;
struct phy_driver *phydrv = to_phy_driver(drv);
int err = 0;
struct gpio_descs *reset_gpios;
phydev->drv = phydrv;
/* take phy out of reset */
reset_gpios = devm_gpiod_get_array_optional(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(reset_gpios))
return PTR_ERR(reset_gpios);
/* Disable the interrupt if the PHY doesn't support it
* but the interrupt is still a valid one
*/