diff options
| author | Michael Walle <michael@walle.cc> | 2022-04-28 00:44:06 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-04-30 02:37:53 +0300 |
| commit | 738871b09250ee9043c0e05101fcc254059f1492 (patch) | |
| tree | 63510c2996b1b9742e3d63e7fb440db845aa3243 /drivers/net/phy/micrel.c | |
| parent | 31d00ca4ce0e1abf5342854606bbe7d20e38c3f8 (diff) | |
| download | linux-738871b09250ee9043c0e05101fcc254059f1492.tar.xz | |
net: phy: micrel: add coma mode GPIO
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@walle.cc>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/phy/micrel.c')
| -rw-r--r-- | drivers/net/phy/micrel.c | 20 |
1 files changed, 20 insertions, 0 deletions
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; |