ADIN1300/1200 support software control over pin polarity for LINK_ST
(link-status) pin.
Configure the polarity during config_init based on device-tree property.
Polarity is only set if specified in device-tree, otherwise the phy
defaults to active-high during reset.
Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>
---
drivers/net/phy/adin.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
index 2e1a46e121d9..a533932afcb8 100644
--- a/drivers/net/phy/adin.c
+++ b/drivers/net/phy/adin.c
@@ -158,6 +158,9 @@
#define ADIN1300_RMII_20_BITS 0x0004
#define ADIN1300_RMII_24_BITS 0x0005
+#define ADIN1300_GE_LNK_STAT_INV_EN_REG 0xff3c
+#define ADIN1300_GE_LNK_STAT_INV_EN BIT(0)
+
/**
* struct adin_cfg_reg_map - map a config value to aregister value
* @cfg: value in device configuration
@@ -522,6 +525,28 @@ static int adin_config_clk_out(struct phy_device *phydev)
ADIN1300_GE_CLK_CFG_MASK, sel);
}
+static int adin_config_link_status_pin_polarity(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ int ret;
+ u32 val;
+
+ if (!device_property_present(dev, "adi,link-st-polarity"))
+ return 0;
+
+ ret = device_property_read_u32(dev, "adi,link-st-polarity", &val);
+ if (ret) {
+ return ret;
+ } else if (val > 1) {
+ phydev_err(phydev, "invalid adi,link-st-polarity\n");
+ return -EINVAL;
+ }
+
+ return phy_modify_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN1300_GE_LNK_STAT_INV_EN_REG,
+ ADIN1300_GE_LNK_STAT_INV_EN, val);
+}
+
static int adin_config_init(struct phy_device *phydev)
{
int rc;
@@ -548,6 +573,10 @@ static int adin_config_init(struct phy_device *phydev)
if (rc < 0)
return rc;
+ rc = adin_config_link_status_pin_polarity(phydev);
+ if (rc < 0)
+ return rc;
+
phydev_dbg(phydev, "PHY is using mode '%s'\n",
phy_modes(phydev->interface));
--
2.35.3
