diff options
| author | Phil Elwell <phil@raspberrypi.org> | 2018-04-19 19:59:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-20 18:39:09 +0300 |
| commit | 1827b0678863bc97a1653fdf5308762b2aefcd56 (patch) | |
| tree | 801fad406c632c29b280d07f43a8a45ff6c5f52a /drivers/net/usb/lan78xx.c | |
| parent | 760db29bdc97b73ff60b091315ad787b1deb5cf5 (diff) | |
| download | linux-1827b0678863bc97a1653fdf5308762b2aefcd56.tar.xz | |
lan78xx: Read LED states from Device Tree
Add support for DT property "microchip,led-modes", a vector of zero
to four cells (u32s) in the range 0-15, each of which sets the mode
for one of the LEDs. Some possible values are:
0=link/activity 1=link1000/activity
2=link100/activity 3=link10/activity
4=link100/1000/activity 5=link10/1000/activity
6=link10/100/activity 14=off 15=on
These values are given symbolic constants in a dt-bindings header.
Also use the presence of the DT property to indicate that the
LEDs should be enabled - necessary in the event that no valid OTP
or EEPROM is available.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/lan78xx.c')
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index a823f010de30..6b03b973083e 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -37,6 +37,7 @@ #include <linux/irqchip/chained_irq.h> #include <linux/microchipphy.h> #include <linux/phy.h> +#include <linux/of_mdio.h> #include <linux/of_net.h> #include "lan78xx.h" @@ -1760,6 +1761,7 @@ done: static int lan78xx_mdio_init(struct lan78xx_net *dev) { + struct device_node *node; int ret; dev->mdiobus = mdiobus_alloc(); @@ -1788,7 +1790,13 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev) break; } - ret = mdiobus_register(dev->mdiobus); + node = of_get_child_by_name(dev->udev->dev.of_node, "mdio"); + if (node) { + ret = of_mdiobus_register(dev->mdiobus, node); + of_node_put(node); + } else { + ret = mdiobus_register(dev->mdiobus); + } if (ret) { netdev_err(dev->net, "can't register MDIO bus\n"); goto exit1; @@ -2077,6 +2085,28 @@ static int lan78xx_phy_init(struct lan78xx_net *dev) mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control); phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv); + if (phydev->mdio.dev.of_node) { + u32 reg; + int len; + + len = of_property_count_elems_of_size(phydev->mdio.dev.of_node, + "microchip,led-modes", + sizeof(u32)); + if (len >= 0) { + /* Ensure the appropriate LEDs are enabled */ + lan78xx_read_reg(dev, HW_CFG, ®); + reg &= ~(HW_CFG_LED0_EN_ | + HW_CFG_LED1_EN_ | + HW_CFG_LED2_EN_ | + HW_CFG_LED3_EN_); + reg |= (len > 0) * HW_CFG_LED0_EN_ | + (len > 1) * HW_CFG_LED1_EN_ | + (len > 2) * HW_CFG_LED2_EN_ | + (len > 3) * HW_CFG_LED3_EN_; + lan78xx_write_reg(dev, HW_CFG, reg); + } + } + genphy_config_aneg(phydev); dev->fc_autoneg = phydev->autoneg; |