Commit a41c653d authored by Jakub Kicinski's avatar Jakub Kicinski

Merge branch 'net-phy-micrel-add-coma-mode-support'

Michael Walle says:

====================
net: phy: micrel: add coma mode support

Add support to disable coma mode by a GPIO line.
====================

Link: https://lore.kernel.org/r/20220427214406.1348872-1-michael@walle.ccSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parents 17d49e6e 738871b0
......@@ -45,3 +45,12 @@ Optional properties:
In fiber mode, auto-negotiation is disabled and the PHY can only work in
100base-fx (full and half duplex) modes.
- coma-mode-gpios: If present the given gpio will be deasserted when the
PHY is probed.
Some PHYs have a COMA mode input pin which puts the PHY into
isolate and power-down mode. On some boards this input is connected
to a GPIO of the SoC.
Supported on the LAN8814.
......@@ -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
......@@ -2729,6 +2730,10 @@ static void lan8814_ptp_init(struct phy_device *phydev)
struct kszphy_ptp_priv *ptp_priv = &priv->ptp_priv;
u32 temp;
if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK) ||
!IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING))
return;
lanphy_write_page_reg(phydev, 5, TSU_HARD_RESET, TSU_HARD_RESET_);
temp = lanphy_read_page_reg(phydev, 5, PTP_TX_MOD);
......@@ -2767,6 +2772,10 @@ static int lan8814_ptp_probe_once(struct phy_device *phydev)
{
struct lan8814_shared_priv *shared = phydev->shared->priv;
if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK) ||
!IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING))
return 0;
/* Initialise shared lock for clock*/
mutex_init(&shared->shared_lock);
......@@ -2829,6 +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;
......@@ -2843,10 +2867,6 @@ static int lan8814_probe(struct phy_device *phydev)
phydev->priv = priv;
if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK) ||
!IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING))
return 0;
/* Strap-in value for PHY address, below register read gives starting
* phy address value
*/
......@@ -2855,6 +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;
......
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