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net: phy: broadcom: Enable 125 MHz clock on LED4 pin for BCM54612E by default. 

BCM54612E have 4 multi-functional LED pins that can be configured
through register setting; the LED4 pin can be configured to a 125MHz
reference clock output by setting the spare register. Since the dedicated
CLK125 reference clock pin is not brought out on the 48-Pin MLP, the LED4
pin is the only pin to provide such function in this package, and therefore
it is beneficial to just enable the reference clock by default.

Signed-off-by: Kun Yi <kunyi@google.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kun Yi 2018-06-04 13:17:04 -07:00 committed by David S. Miller
parent 3d609342cc
commit 69e2ecccd0
2 changed files with 18 additions and 2 deletions
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16
drivers/net/phy/broadcom.c
View File

@ -54,6 +54,8 @@ static int bcm54210e_config_init(struct phy_device *phydev)
static int bcm54612e_config_init(struct phy_device *phydev)
{
int reg;
/* Clear TX internal delay unless requested. */
if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
(phydev->interface != PHY_INTERFACE_MODE_RGMII_TXID)) {
@ -65,8 +67,6 @@ static int bcm54612e_config_init(struct phy_device *phydev)
/* Clear RX internal delay unless requested. */
if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
(phydev->interface != PHY_INTERFACE_MODE_RGMII_RXID)) {
u16 reg;
reg = bcm54xx_auxctl_read(phydev,
MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
/* Disable RXD to RXC delay (default set) */
@ -77,6 +77,18 @@ static int bcm54612e_config_init(struct phy_device *phydev)
MII_BCM54XX_AUXCTL_MISC_WREN | reg);
}
/* Enable CLK125 MUX on LED4 if ref clock is enabled. */
if (!(phydev->dev_flags & PHY_BRCM_RX_REFCLK_UNUSED)) {
int err;
reg = bcm_phy_read_exp(phydev, BCM54612E_EXP_SPARE0);
err = bcm_phy_write_exp(phydev, BCM54612E_EXP_SPARE0,
BCM54612E_LED4_CLK125OUT_EN | reg);
if (err < 0)
return err;
}
return 0;
}

4
include/linux/brcmphy.h
View File

@ -85,6 +85,7 @@
#define MII_BCM54XX_EXP_SEL 0x17 /* Expansion register select */
#define MII_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */
#define MII_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */
#define MII_BCM54XX_EXP_SEL_ETC 0x0d00 /* Expansion register spare + 2k mem */
#define MII_BCM54XX_AUX_CTL 0x18 /* Auxiliary control register */
#define MII_BCM54XX_ISR 0x1a /* BCM54xx interrupt status register */
@ -219,6 +220,9 @@
#define BCM54810_SHD_CLK_CTL 0x3
#define BCM54810_SHD_CLK_CTL_GTXCLK_EN (1 << 9)
/* BCM54612E Registers */
#define BCM54612E_EXP_SPARE0 (MII_BCM54XX_EXP_SEL_ETC + 0x34)
#define BCM54612E_LED4_CLK125OUT_EN (1 << 1)
/*****************************************************************************/
/* Fast Ethernet Transceiver definitions. */