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Commit da47b457 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by David S. Miller
Browse files

phy: add support for a reset-gpio specification 



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

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f23e0f65

Documentation/devicetree/bindings/net/phy.txt

+3 −0
Original line number Diff line number Diff line
@@ -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>;

};

drivers/net/phy/phy_device.c

+8 −0
Original line number Diff line number Diff line
@@ -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

	 */