Commit 36934cac authored by Alexandru Tachici's avatar Alexandru Tachici Committed by David S. Miller
Browse files

net: ethernet: adi: adin1110: add reset GPIO 



Add an optional GPIO to be used for a hardware reset of the IC.

Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c0facc04

drivers/net/ethernet/adi/adin1110.c

+21 −0
Original line number Diff line number Diff line
@@ -1082,9 +1082,30 @@ static void adin1110_adjust_link(struct net_device *dev) 
 */

static int adin1110_check_spi(struct adin1110_priv *priv)

{

	struct gpio_desc *reset_gpio;

	int ret;

	u32 val;



	reset_gpio = devm_gpiod_get_optional(&priv->spidev->dev, "reset",

					     GPIOD_OUT_LOW);

	if (reset_gpio) {

		/* MISO pin is used for internal configuration, can't have

		 * anyone else disturbing the SDO line.

		 */

		spi_bus_lock(priv->spidev->controller);



		gpiod_set_value(reset_gpio, 1);

		fsleep(10000);

		gpiod_set_value(reset_gpio, 0);



		/* Need to wait 90 ms before interacting with

		 * the MAC after a HW reset.

		 */

		fsleep(90000);



		spi_bus_unlock(priv->spidev->controller);

	}



	ret = adin1110_read_reg(priv, ADIN1110_PHY_ID, &val);

	if (ret < 0)

		return ret;