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From: Gabor Juhos <juhosg@openwrt.org>
Subject: net: phy: allow to configure AR803x PHYs via platform data
Add a patch for the at803x phy driver, in order to be able
to configure some register settings via platform data.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
---
drivers/net/phy/at803x.c | 56 ++++++++++++++++++++++++++++++++
include/linux/platform_data/phy-at803x.h | 11 +++++++
2 files changed, 67 insertions(+)
create mode 100644 include/linux/platform_data/phy-at803x.h
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -12,12 +12,14 @@
*/
#include <linux/phy.h>
+#include <linux/mdio.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
+#include <linux/platform_data/phy-at803x.h>
#define AT803X_INTR_ENABLE 0x12
#define AT803X_INTR_ENABLE_AUTONEG_ERR BIT(15)
@@ -45,6 +47,11 @@
#define AT803X_REG_CHIP_CONFIG 0x1f
#define AT803X_BT_BX_REG_SEL 0x8000
+#define AT803X_PCS_SMART_EEE_CTRL3 0x805D
+#define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_MASK 0x3
+#define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_SHIFT 12
+#define AT803X_SMART_EEE_CTRL3_LPI_EN BIT(8)
+
#define AT803X_DEBUG_ADDR 0x1D
#define AT803X_DEBUG_DATA 0x1E
@@ -72,6 +79,7 @@ MODULE_LICENSE("GPL");
struct at803x_priv {
bool phy_reset:1;
struct gpio_desc *gpiod_reset;
+ int prev_speed;
};
struct at803x_context {
@@ -276,8 +284,16 @@ does_not_require_reset_workaround:
return 0;
}
+static void at803x_disable_smarteee(struct phy_device *phydev)
+{
+ phy_write_mmd(phydev, MDIO_MMD_PCS, AT803X_PCS_SMART_EEE_CTRL3,
+ 1 << AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_SHIFT);
+ phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
+}
+
static int at803x_config_init(struct phy_device *phydev)
{
+ struct at803x_platform_data *pdata;
int ret;
ret = genphy_config_init(phydev);
@@ -298,6 +314,26 @@ static int at803x_config_init(struct phy
return ret;
}
+ pdata = dev_get_platdata(&phydev->mdio.dev);
+ if (pdata) {
+ if (pdata->disable_smarteee)
+ at803x_disable_smarteee(phydev);
+
+ if (pdata->enable_rgmii_rx_delay)
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, 0,
+ AT803X_DEBUG_RX_CLK_DLY_EN);
+ else
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
+ AT803X_DEBUG_RX_CLK_DLY_EN, 0);
+
+ if (pdata->enable_rgmii_tx_delay)
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5, 0,
+ AT803X_DEBUG_TX_CLK_DLY_EN);
+ else
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5,
+ AT803X_DEBUG_TX_CLK_DLY_EN, 0);
+ }
+
return 0;
}
@@ -335,6 +371,8 @@ static int at803x_config_intr(struct phy
static void at803x_link_change_notify(struct phy_device *phydev)
{
struct at803x_priv *priv = phydev->priv;
+ struct at803x_platform_data *pdata;
+ pdata = dev_get_platdata(&phydev->mdio.dev);
/*
* Conduct a hardware reset for AT8030/2 every time a link loss is
@@ -363,6 +401,24 @@ static void at803x_link_change_notify(st
} else {
priv->phy_reset = false;
}
+ if (pdata && pdata->fixup_rgmii_tx_delay &&
+ phydev->speed != priv->prev_speed) {
+ switch (phydev->speed) {
+ case SPEED_10:
+ case SPEED_100:
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5, 0,
+ AT803X_DEBUG_TX_CLK_DLY_EN);
+ break;
+ case SPEED_1000:
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5,
+ AT803X_DEBUG_TX_CLK_DLY_EN, 0);
+ break;
+ default:
+ break;
+ }
+
+ priv->prev_speed = phydev->speed;
+ }
}
static int at803x_aneg_done(struct phy_device *phydev)
--- /dev/null
+++ b/include/linux/platform_data/phy-at803x.h
@@ -0,0 +1,11 @@
+#ifndef _PHY_AT803X_PDATA_H
+#define _PHY_AT803X_PDATA_H
+
+struct at803x_platform_data {
+ int disable_smarteee:1;
+ int enable_rgmii_tx_delay:1;
+ int enable_rgmii_rx_delay:1;
+ int fixup_rgmii_tx_delay:1;
+};
+
+#endif /* _PHY_AT803X_PDATA_H */
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