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Commit 698244ac authored by Giuseppe Cavallaro's avatar Giuseppe Cavallaro Committed by David S. Miller
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phy: SMSC device Energy Detect power-down mode 



SMSC Ethernet Transceivers (LAN88710, LAN8710, LAN8720, LAN8187,
LAN8700, LAN83C185) provide a mechanism to conserve power when
the device is not connected to an active link partner
(Energy Detect Mode).
So this patch enables the Energy Detect power-down mode
for these Transceivers.

Signed-off-by: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 63526713

drivers/net/phy/smsc.c

+19 −2
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 


#define MII_LAN83C185_ISF 29 /* Interrupt Source Flags */

#define MII_LAN83C185_IM  30 /* Interrupt Mask */

#define MII_LAN83C185_CTRL_STATUS 17 /* Mode/Status Register */



#define MII_LAN83C185_ISF_INT1 (1<<1) /* Auto-Negotiation Page Received */

#define MII_LAN83C185_ISF_INT2 (1<<2) /* Parallel Detection Fault */
@@ -37,8 +38,10 @@ 
#define MII_LAN83C185_ISF_INT_ALL (0x0e)



#define MII_LAN83C185_ISF_INT_PHYLIB_EVENTS \

	(MII_LAN83C185_ISF_INT6 | MII_LAN83C185_ISF_INT4)

	(MII_LAN83C185_ISF_INT6 | MII_LAN83C185_ISF_INT4 | \

	 MII_LAN83C185_ISF_INT7)



#define MII_LAN83C185_EDPWRDOWN	(1 << 13) /* EDPWRDOWN */



static int smsc_phy_config_intr(struct phy_device *phydev)

{
@@ -59,9 +62,23 @@ static int smsc_phy_ack_interrupt(struct phy_device *phydev) 


static int smsc_phy_config_init(struct phy_device *phydev)

{

	int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);

	if (rc < 0)

		return rc;



	/* Enable energy detect mode for this SMSC Transceivers */

	rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,

		       rc | MII_LAN83C185_EDPWRDOWN);

	if (rc < 0)

		return rc;



	return smsc_phy_ack_interrupt (phydev);

}



static int lan911x_config_init(struct phy_device *phydev)

{

	return smsc_phy_ack_interrupt(phydev);

}



static struct phy_driver lan83c185_driver = {

	.phy_id		= 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
@@ -147,7 +164,7 @@ static struct phy_driver lan911x_int_driver = { 
	/* basic functions */

	.config_aneg	= genphy_config_aneg,

	.read_status	= genphy_read_status,

	.config_init	= smsc_phy_config_init,

	.config_init	= lan911x_config_init,



	/* IRQ related */

	.ack_interrupt	= smsc_phy_ack_interrupt,