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MLK-24295 net: phy: realtek: add dt property to enable clkout 

Add dt property for user to enable clkout for MAC.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Fugang Duan 2020-06-09 17:39:24 +08:00
parent a376a92b7d
commit 8ff0ff4785
2 changed files with 53 additions and 0 deletions
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7
Documentation/devicetree/bindings/net/realtek.txt 100644
View File

@ -0,0 +1,7 @@
Realtek PHY properties.
These properties cover the base properties Realtek PHYs.
Optional properties:
- rtl821x,clkout_en : enable clkout to supply clocks for MAC.

46
drivers/net/phy/realtek.c
View File

@ -9,6 +9,7 @@
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*/
#include <linux/bitops.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/module.h>
@ -50,10 +51,20 @@
#define RTL_GENERIC_PHYID 0x001cc800
/* page 0xa43, register 0x19 */
#define RTL8211F_PHYCR2 0x19
#define RTL8211F_CLKOUT_EN BIT(0)
#define RTL821X_CLKOUT_EN_FEATURE (1 << 0)
MODULE_DESCRIPTION("Realtek PHY driver");
MODULE_AUTHOR("Johnson Leung");
MODULE_LICENSE("GPL");
struct rtl821x_priv {
u32 quirks;
};
static int rtl821x_read_page(struct phy_device *phydev)
{
return __phy_read(phydev, RTL821x_PAGE_SELECT);
@ -64,6 +75,23 @@ static int rtl821x_write_page(struct phy_device *phydev, int page)
return __phy_write(phydev, RTL821x_PAGE_SELECT, page);
}
static int rtl821x_probe(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
struct rtl821x_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
if (of_property_read_bool(dev->of_node, "rtl821x,clkout_en"))
priv->quirks |= RTL821X_CLKOUT_EN_FEATURE;
phydev->priv = priv;
return 0;
}
static int rtl8201_ack_interrupt(struct phy_device *phydev)
{
int err;
@ -175,6 +203,7 @@ static int rtl8211f_config_init(struct phy_device *phydev)
u16 txdly = 0;
u16 rxdly = 0;
int ret;
struct rtl821x_priv *priv = phydev->priv;
/* enable TX-delay for rgmii-{id,txid}, and disable it for rgmii and
* rgmii-rxid. The RX-delay can be enabled by the external RXDLY pin.
@ -206,6 +235,22 @@ static int rtl8211f_config_init(struct phy_device *phydev)
return ret;
}
if (priv->quirks & RTL821X_CLKOUT_EN_FEATURE) {
ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
RTL8211F_CLKOUT_EN, RTL8211F_CLKOUT_EN);
if (ret < 0) {
dev_err(&phydev->mdio.dev, "clkout enable failed\n");
return ret;
}
} else {
ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
RTL8211F_CLKOUT_EN, 0);
if (ret < 0) {
dev_err(&phydev->mdio.dev, "clkout disable failed\n");
return ret;
}
}
return ret;
}
@ -505,6 +550,7 @@ static struct phy_driver realtek_drvs[] = {
}, {
PHY_ID_MATCH_EXACT(0x001cc916),
.name = "RTL8211F Gigabit Ethernet",
.probe = rtl821x_probe,
.config_init = &rtl8211f_config_init,
.ack_interrupt = &rtl8211f_ack_interrupt,
.config_intr = &rtl8211f_config_intr,