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net: phy: c45-tja11xx: add support for outputting RMII reference clock

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For TJA11xx PHYs, they have the capability to output 50MHz reference
clock on REF_CLK pin in RMII mode, which is called "revRMII" mode in
the PHY data sheet.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Wei Fang
2024-10-10 14:19:44 +08:00
committed by Paolo Abeni
parent 09277e4fc9
commit 6d8d89873a
2 changed files with 30 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/phy/nxp-c45-tja11xx.c
View File

@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/processor.h>
#include <linux/property.h>
@@ -185,6 +186,8 @@
#define NXP_C45_SKB_CB(skb) ((struct nxp_c45_skb_cb *)(skb)->cb)
#define TJA11XX_REVERSE_MODE BIT(0)
struct nxp_c45_phy;
struct nxp_c45_skb_cb {
@@ -1510,6 +1513,8 @@ static int nxp_c45_get_delays(struct phy_device *phydev)
static int nxp_c45_set_phy_mode(struct phy_device *phydev)
{
struct nxp_c45_phy *priv = phydev->priv;
u16 basic_config;
int ret;
ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_ABILITIES);
@@ -1561,8 +1566,15 @@ static int nxp_c45_set_phy_mode(struct phy_device *phydev)
phydev_err(phydev, "rmii mode not supported\n");
return -EINVAL;
}
basic_config = MII_BASIC_CONFIG_RMII;
/* This is not PHY_INTERFACE_MODE_REVRMII */
if (priv->flags & TJA11XX_REVERSE_MODE)
basic_config |= MII_BASIC_CONFIG_REV;
phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG,
MII_BASIC_CONFIG_RMII);
basic_config);
break;
case PHY_INTERFACE_MODE_SGMII:
if (!(ret & SGMII_ABILITY)) {
@@ -1623,6 +1635,20 @@ static int nxp_c45_get_features(struct phy_device *phydev)
return genphy_c45_pma_read_abilities(phydev);
}
static int nxp_c45_parse_dt(struct phy_device *phydev)
{
struct device_node *node = phydev->mdio.dev.of_node;
struct nxp_c45_phy *priv = phydev->priv;
if (!IS_ENABLED(CONFIG_OF_MDIO))
return 0;
if (of_property_read_bool(node, "nxp,rmii-refclk-out"))
priv->flags |= TJA11XX_REVERSE_MODE;
return 0;
}
static int nxp_c45_probe(struct phy_device *phydev)
{
struct nxp_c45_phy *priv;
@@ -1642,6 +1668,8 @@ static int nxp_c45_probe(struct phy_device *phydev)
phydev->priv = priv;
nxp_c45_parse_dt(phydev);
mutex_init(&priv->ptp_lock);
phy_abilities = phy_read_mmd(phydev, MDIO_MMD_VEND1,

1
drivers/net/phy/nxp-c45-tja11xx.h
View File

@@ -28,6 +28,7 @@ struct nxp_c45_phy {
int extts_index;
bool extts;
struct nxp_c45_macsec *macsec;
u32 flags;
};
#if IS_ENABLED(CONFIG_MACSEC)