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| author | Alexandru Tachici <alexandru.tachici@analog.com> | 2022-10-19 20:13:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-10-21 13:11:33 +0100 |
| commit | 36934cac7aaffaf11cb8fad1e828dd61708d9b89 (patch) | |
| tree | 4cec481723771a8a3e7c2220b2137387c7b3716e /drivers/net/ethernet/adi | |
| parent | c0facc045a144053ba2067894444d14e8fffeaa3 (diff) | |
| download | linux-36934cac7aaffaf11cb8fad1e828dd61708d9b89.tar.gz linux-36934cac7aaffaf11cb8fad1e828dd61708d9b89.tar.bz2 linux-36934cac7aaffaf11cb8fad1e828dd61708d9b89.zip | |
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.c | 21 |
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; |