Commit 7527d662 authored by Marek Behún's avatar Marek Behún Committed by David S. Miller
Browse files

net: dsa: mv88e6xxx: Save power by disabling SerDes trasmitter and receiver 



Save power on 88E6393X by disabling SerDes receiver and transmitter
after SerDes is SerDes is disabled.

Signed-off-by: default avatarMarek Behún <kabel@kernel.org>
Cc: stable@vger.kernel.org # de776d0d ("net: dsa: mv88e6xxx: add support for mv88e6393x family")
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8c3318b4

drivers/net/dsa/mv88e6xxx/serdes.c

+42 −4
Original line number Diff line number Diff line
@@ -1271,6 +1271,28 @@ void mv88e6390_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p) 
	}

}



static int mv88e6393x_serdes_power_lane(struct mv88e6xxx_chip *chip, int lane,

					bool on)

{

	u16 reg;

	int err;



	err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,

				    MV88E6393X_SERDES_CTRL1, &reg);

	if (err)

		return err;



	if (on)

		reg &= ~(MV88E6393X_SERDES_CTRL1_TX_PDOWN |

			 MV88E6393X_SERDES_CTRL1_RX_PDOWN);

	else

		reg |= MV88E6393X_SERDES_CTRL1_TX_PDOWN |

		       MV88E6393X_SERDES_CTRL1_RX_PDOWN;



	return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,

				      MV88E6393X_SERDES_CTRL1, reg);

}



static int mv88e6393x_serdes_erratum_4_6(struct mv88e6xxx_chip *chip, int lane)

{

	u16 reg;
@@ -1297,7 +1319,11 @@ static int mv88e6393x_serdes_erratum_4_6(struct mv88e6xxx_chip *chip, int lane) 
	if (err)

		return err;



	return mv88e6390_serdes_power_sgmii(chip, lane, false);

	err = mv88e6390_serdes_power_sgmii(chip, lane, false);

	if (err)

		return err;



	return mv88e6393x_serdes_power_lane(chip, lane, false);

}



int mv88e6393x_serdes_setup_errata(struct mv88e6xxx_chip *chip)
@@ -1362,17 +1388,29 @@ int mv88e6393x_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane, 
		err = mv88e6393x_serdes_erratum_4_8(chip, lane);

		if (err)

			return err;



		err = mv88e6393x_serdes_power_lane(chip, lane, true);

		if (err)

			return err;

	}



	switch (cmode) {

	case MV88E6XXX_PORT_STS_CMODE_SGMII:

	case MV88E6XXX_PORT_STS_CMODE_1000BASEX:

	case MV88E6XXX_PORT_STS_CMODE_2500BASEX:

		return mv88e6390_serdes_power_sgmii(chip, lane, on);

		err = mv88e6390_serdes_power_sgmii(chip, lane, on);

		break;

	case MV88E6393X_PORT_STS_CMODE_5GBASER:

	case MV88E6393X_PORT_STS_CMODE_10GBASER:

		return mv88e6390_serdes_power_10g(chip, lane, on);

		err = mv88e6390_serdes_power_10g(chip, lane, on);

		break;

	}



	return 0;

	if (err)

		return err;



	if (!on)

		err = mv88e6393x_serdes_power_lane(chip, lane, false);



	return err;

}

drivers/net/dsa/mv88e6xxx/serdes.h

+3 −0
Original line number Diff line number Diff line
@@ -93,6 +93,9 @@ 
#define MV88E6393X_SERDES_POC_PCS_MASK		0x0007

#define MV88E6393X_SERDES_POC_RESET		BIT(15)

#define MV88E6393X_SERDES_POC_PDOWN		BIT(5)

#define MV88E6393X_SERDES_CTRL1			0xf003

#define MV88E6393X_SERDES_CTRL1_TX_PDOWN	BIT(9)

#define MV88E6393X_SERDES_CTRL1_RX_PDOWN	BIT(8)



#define MV88E6393X_ERRATA_4_8_REG		0xF074

#define MV88E6393X_ERRATA_4_8_BIT		BIT(14)