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net: ethernet: adi: adin1110: add reset GPIO

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

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexandru Tachici 2022-10-19 20:13:13 +03:00 committed by David S. Miller
parent c0facc045a
commit 36934cac7a
1 changed files with 21 additions and 0 deletions
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21
drivers/net/ethernet/adi/adin1110.c
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@ -1082,9 +1082,30 @@ static void adin1110_adjust_link(struct net_device *dev)
*/ */
static int adin1110_check_spi(struct adin1110_priv *priv) static int adin1110_check_spi(struct adin1110_priv *priv)
{ {
struct gpio_desc *reset_gpio;
int ret; int ret;
u32 val; 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); ret = adin1110_read_reg(priv, ADIN1110_PHY_ID, &val);
if (ret < 0) if (ret < 0)
return ret; return ret;