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authorAlexandru Tachici <alexandru.tachici@analog.com>2022-10-19 20:13:13 +0300
committerDavid S. Miller <davem@davemloft.net>2022-10-21 13:11:33 +0100
commit36934cac7aaffaf11cb8fad1e828dd61708d9b89 (patch)
tree4cec481723771a8a3e7c2220b2137387c7b3716e /drivers/net/ethernet/adi
parentc0facc045a144053ba2067894444d14e8fffeaa3 (diff)
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net: ethernet: adi: adin1110: add reset GPIO
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>
Diffstat (limited to 'drivers/net/ethernet/adi')
-rw-r--r--drivers/net/ethernet/adi/adin1110.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/ethernet/adi/adin1110.c b/drivers/net/ethernet/adi/adin1110.c
index 086aa9c96b31..1c0015b55993 100644
--- a/drivers/net/ethernet/adi/adin1110.c
+++ b/drivers/net/ethernet/adi/adin1110.c
@@ -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;