The LAN8814 has a coma mode pin which puts the PHY into isolate and
power-dowm mode. Unfortunately, the mode cannot be disabled by a
register. Usually, the input pin has a pull-up and connected to a GPIO
which can then be used to disable the mode. Try to get the GPIO and
deassert it.
Signed-off-by: Michael Walle <michael@xxxxxxxx>
---
drivers/net/phy/micrel.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index b981c5eaac33..685a0ab5453c 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -32,6 +32,7 @@
#include <linux/ptp_clock.h>
#include <linux/ptp_classify.h>
#include <linux/net_tstamp.h>
+#include <linux/gpio/consumer.h>
/* Operation Mode Strap Override */
#define MII_KSZPHY_OMSO 0x16
@@ -2837,6 +2838,21 @@ static int lan8814_config_init(struct phy_device *phydev)
return 0;
}
+static int lan8814_release_coma_mode(struct phy_device *phydev)
+{
+ struct gpio_desc *gpiod;
+
+ gpiod = devm_gpiod_get_optional(&phydev->mdio.dev, "coma-mode",
+ GPIOD_OUT_HIGH_OPEN_DRAIN);
+ if (IS_ERR(gpiod))
+ return PTR_ERR(gpiod);
+
+ gpiod_set_consumer_name(gpiod, "LAN8814 coma mode");
+ gpiod_set_value_cansleep(gpiod, 0);
+
+ return 0;
+}
+
static int lan8814_probe(struct phy_device *phydev)
{
struct kszphy_priv *priv;
@@ -2859,6 +2875,10 @@ static int lan8814_probe(struct phy_device *phydev)
addr, sizeof(struct lan8814_shared_priv));
if (phy_package_init_once(phydev)) {
+ err = lan8814_release_coma_mode(phydev);
+ if (err)
+ return err;
+
err = lan8814_ptp_probe_once(phydev);
if (err)
return err;
--
2.30.2
