提交 da47b457 编写于 作者: U Uwe Kleine-König 提交者: David S. Miller

phy: add support for a reset-gpio specification

The framework only asserts (for now) that the reset gpio is not active.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 f23e0f65
......@@ -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>;
};
......@@ -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
*/
......
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