History log of /linux-6.15/include/linux/brcmphy.h (Results 1 – 25 of 80)
Revision (<<< Hide revision tags) (Show revision tags >>>) Date Author Comments
Revision tags: v6.15, v6.15-rc7, v6.15-rc6, v6.15-rc5, v6.15-rc4, v6.15-rc3, v6.15-rc2, v6.15-rc1, v6.14, v6.14-rc7, v6.14-rc6, v6.14-rc5, v6.14-rc4, v6.14-rc3, v6.14-rc2, v6.14-rc1, v6.13, v6.13-rc7, v6.13-rc6, v6.13-rc5, v6.13-rc4, v6.13-rc3, v6.13-rc2, v6.13-rc1, v6.12, v6.12-rc7, v6.12-rc6, v6.12-rc5, v6.12-rc4, v6.12-rc3, v6.12-rc2, v6.12-rc1, v6.11, v6.11-rc7, v6.11-rc6, v6.11-rc5, v6.11-rc4, v6.11-rc3, v6.11-rc2, v6.11-rc1, v6.10
# ff253875 12-Jul-2024 Kamil Horák (2N) <[email protected]>

net: phy: bcm54811: Add LRE registers definitions

Add the definitions of LRE registers for Broadcom BCM5481x PHY

Signed-off-by: Kamil Horák (2N) <[email protected]>
Reviewed-by: Andrew Lunn <andrew@l

net: phy: bcm54811: Add LRE registers definitions

Add the definitions of LRE registers for Broadcom BCM5481x PHY

Signed-off-by: Kamil Horák (2N) <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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Revision tags: v6.10-rc7, v6.10-rc6, v6.10-rc5, v6.10-rc4, v6.10-rc3, v6.10-rc2, v6.10-rc1, v6.9, v6.9-rc7, v6.9-rc6, v6.9-rc5, v6.9-rc4, v6.9-rc3, v6.9-rc2, v6.9-rc1, v6.8, v6.8-rc7, v6.8-rc6, v6.8-rc5, v6.8-rc4, v6.8-rc3, v6.8-rc2, v6.8-rc1, v6.7, v6.7-rc8, v6.7-rc7, v6.7-rc6, v6.7-rc5, v6.7-rc4, v6.7-rc3, v6.7-rc2, v6.7-rc1, v6.6, v6.6-rc7, v6.6-rc6, v6.6-rc5
# 3abbd069 05-Oct-2023 Giulio Benetti <[email protected]>

net: phy: broadcom: add support for BCM5221 phy

This patch adds the BCM5221 PHY support by reusing brcm_fet_*()
callbacks and adding quirks for BCM5221 when needed.

Cc: Jim Reinhart <[email protected]

net: phy: broadcom: add support for BCM5221 phy

This patch adds the BCM5221 PHY support by reusing brcm_fet_*()
callbacks and adding quirks for BCM5221 when needed.

Cc: Jim Reinhart <[email protected]>
Cc: James Autry <[email protected]>
Cc: Matthew Maron <[email protected]>
Signed-off-by: Giulio Benetti <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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Revision tags: v6.6-rc4, v6.6-rc3, v6.6-rc2, v6.6-rc1, v6.5, v6.5-rc7, v6.5-rc6, v6.5-rc5, v6.5-rc4, v6.5-rc3, v6.5-rc2
# 9fa0bba0 13-Jul-2023 Florian Fainelli <[email protected]>

net: phy: bcm7xxx: Add EPHY entry for 74165

74165 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
utilize the recently defined 16nm EPHY macro to configure that PHY.

Reviewed-by: Simon

net: phy: bcm7xxx: Add EPHY entry for 74165

74165 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
utilize the recently defined 16nm EPHY macro to configure that PHY.

Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: Justin Chen <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v6.5-rc1, v6.4, v6.4-rc7, v6.4-rc6
# bd5736e1 07-Jun-2023 Florian Fainelli <[email protected]>

net: phy: broadcom: Add support for setting LED brightness

Broadcom PHYs have two LEDs selector registers which allow us to control
the LED assignment, including how to turn them on/off.

Signed-off

net: phy: broadcom: Add support for setting LED brightness

Broadcom PHYs have two LEDs selector registers which allow us to control
the LED assignment, including how to turn them on/off.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# 57fd7d59 07-Jun-2023 Florian Fainelli <[email protected]>

net: phy: broadcom: Rename LED registers

These registers are common to most PHYs and are not specific to the
BCM5482, renamed the constants accordingly, no functional change.

Signed-off-by: Florian

net: phy: broadcom: Rename LED registers

These registers are common to most PHYs and are not specific to the
BCM5482, renamed the constants accordingly, no functional change.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v6.4-rc5
# e8b6f79b 31-May-2023 Florian Fainelli <[email protected]>

net: phy: broadcom: Add LPI counter

Add the ability to read the PHY maintained LPI counter which is in the
Clause 45 vendor space, device address 7, offset 0x803F. The counter is
cleared on read.

S

net: phy: broadcom: Add LPI counter

Add the ability to read the PHY maintained LPI counter which is in the
Clause 45 vendor space, device address 7, offset 0x803F. The counter is
cleared on read.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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Revision tags: v6.4-rc4, v6.4-rc3, v6.4-rc2
# 8baddaa9 11-May-2023 Florian Fainelli <[email protected]>

net: phy: broadcom: Add support for Wake-on-LAN

Add support for WAKE_UCAST, WAKE_MCAST, WAKE_BCAST, WAKE_MAGIC and
WAKE_MAGICSECURE. This is only supported with the BCM54210E and
compatible Ethernet

net: phy: broadcom: Add support for Wake-on-LAN

Add support for WAKE_UCAST, WAKE_MCAST, WAKE_BCAST, WAKE_MAGIC and
WAKE_MAGICSECURE. This is only supported with the BCM54210E and
compatible Ethernet PHYs. Using the in-band interrupt or an out of band
GPIO interrupts are supported.

Broadcom PHYs will generate a Wake-on-LAN level low interrupt on LED4 as
soon as one of the supported patterns is being matched. That includes
generating such an interrupt even if the PHY is operated during normal
modes. If WAKE_UCAST is selected, this could lead to the LED4 interrupt
firing up for every packet being received which is absolutely
undesirable from a performance point of view.

Because the Wake-on-LAN configuration can be set long before the system
is actually put to sleep, we cannot have an interrupt service routine to
clear on read the interrupt status register and ensure that new packet
matches will be detected.

It is desirable to enable the Wake-on-LAN interrupt as late as possible
during the system suspend process such that we limit the number of
interrupts to be handled by the system, but also conversely feed into
the Linux's system suspend way of dealing with interrupts in and around
the points of no return.

Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v6.4-rc1, v6.3, v6.3-rc7, v6.3-rc6, v6.3-rc5, v6.3-rc4, v6.3-rc3, v6.3-rc2, v6.3-rc1, v6.2, v6.2-rc8, v6.2-rc7, v6.2-rc6, v6.2-rc5, v6.2-rc4, v6.2-rc3, v6.2-rc2, v6.2-rc1, v6.1, v6.1-rc8, v6.1-rc7, v6.1-rc6, v6.1-rc5, v6.1-rc4, v6.1-rc3, v6.1-rc2, v6.1-rc1, v6.0, v6.0-rc7, v6.0-rc6, v6.0-rc5, v6.0-rc4, v6.0-rc3, v6.0-rc2
# 0630f64d 15-Aug-2022 Florian Fainelli <[email protected]>

net: phy: broadcom: Implement suspend/resume for AC131 and BCM5241

Implement the suspend/resume procedure for the Broadcom AC131 and BCM5241 type
of PHYs (10/100 only) by entering the standard power

net: phy: broadcom: Implement suspend/resume for AC131 and BCM5241

Implement the suspend/resume procedure for the Broadcom AC131 and BCM5241 type
of PHYs (10/100 only) by entering the standard power down followed by the
proprietary standby mode in the auxiliary mode 4 shadow register. On resume,
the PHY software reset is enough to make it come out of standby mode so we can
utilize brcm_fet_config_init() as the resume hook.

Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v6.0-rc1, v5.19, v5.19-rc8, v5.19-rc7, v5.19-rc6, v5.19-rc5
# 39bfb3c1 01-Jul-2022 Kurt Kanzenbach <[email protected]>

net: phy: broadcom: Add support for BCM53128 internal PHYs

Add support for BCM53128 internal PHYs. These support interrupts as well as
statistics. Therefore, enable the Broadcom PHY driver for them.

net: phy: broadcom: Add support for BCM53128 internal PHYs

Add support for BCM53128 internal PHYs. These support interrupts as well as
statistics. Therefore, enable the Broadcom PHY driver for them.

Tested on BCM53128 switch using the mainline b53 DSA driver.

Signed-off-by: Kurt Kanzenbach <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.19-rc4, v5.19-rc3, v5.19-rc2, v5.19-rc1, v5.18, v5.18-rc7, v5.18-rc6, v5.18-rc5, v5.18-rc4, v5.18-rc3, v5.18-rc2, v5.18-rc1, v5.17, v5.17-rc8, v5.17-rc7, v5.17-rc6, v5.17-rc5, v5.17-rc4, v5.17-rc3, v5.17-rc2, v5.17-rc1, v5.16, v5.16-rc8, v5.16-rc7, v5.16-rc6, v5.16-rc5, v5.16-rc4, v5.16-rc3, v5.16-rc2, v5.16-rc1, v5.15, v5.15-rc7
# 218f23e8 22-Oct-2021 Florian Fainelli <[email protected]>

net: phy: bcm7xxx: Add EPHY entry for 7712

7712 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
utilize the recently defined 16nm EPHY macro to configure that PHY.

Signed-off-by: Flori

net: phy: bcm7xxx: Add EPHY entry for 7712

7712 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
utilize the recently defined 16nm EPHY macro to configure that PHY.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.15-rc6, v5.15-rc5, v5.15-rc4, v5.15-rc3
# ae98f40d 23-Sep-2021 Florian Fainelli <[email protected]>

net: phy: broadcom: Fix PHY_BRCM_IDDQ_SUSPEND definition

An extraneous number was added during the inclusion of that change,
correct that such that we use a single bit as is expected by the PHY
driv

net: phy: broadcom: Fix PHY_BRCM_IDDQ_SUSPEND definition

An extraneous number was added during the inclusion of that change,
correct that such that we use a single bit as is expected by the PHY
driver.

Reported-by: Justin Chen <[email protected]>
Fixes: d6da08ed1425 ("net: phy: broadcom: Add IDDQ-SR mode")
Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# d6da08ed 20-Sep-2021 Florian Fainelli <[email protected]>

net: phy: broadcom: Add IDDQ-SR mode

Add support for putting the PHY into IDDQ Soft Recovery mode by setting
the TOP_MISC register bits accordingly. This requires us to implement a
custom bcm54xx_su

net: phy: broadcom: Add IDDQ-SR mode

Add support for putting the PHY into IDDQ Soft Recovery mode by setting
the TOP_MISC register bits accordingly. This requires us to implement a
custom bcm54xx_suspend() routine which diverges from genphy_suspend() in
order to configure the PHY to enter IDDQ with software recovery as well
as avoid doing a read/modify/write on the BMCR register.

Doing a read/modify/write on the BMCR register means that the
auto-negotation bit may remain which interferes with the ability to put
the PHY into IDDQ-SR mode. We do software reset upon suspend in order to
put the PHY back into its state prior to suspend as recommended by the
datasheet.

Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.15-rc2
# f68d08c4 17-Sep-2021 Florian Fainelli <[email protected]>

net: phy: bcm7xxx: Add EPHY entry for 72165

72165 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
create a new macro and set of functions for this different process type.

Signed-off-by

net: phy: bcm7xxx: Add EPHY entry for 72165

72165 is a 16nm process SoC with a 10/100 integrated Ethernet PHY,
create a new macro and set of functions for this different process type.

Signed-off-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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# 8dc84dcd 16-Sep-2021 Florian Fainelli <[email protected]>

net: phy: broadcom: Enable 10BaseT DAC early wake

Enable the DAC early wake when then link operates at 10BaseT allows
power savings in the hundreds of milli Watts by shutting down the
transmitter. A

net: phy: broadcom: Enable 10BaseT DAC early wake

Enable the DAC early wake when then link operates at 10BaseT allows
power savings in the hundreds of milli Watts by shutting down the
transmitter. A number of errata have been issued for various Gigabit
PHYs and the recommendation is to enable both the early and forced DAC
wake to be on the safe side. This needs to be done dynamically based
upon the link state, which is why a link_change_notify callback is
utilized.

Signed-off-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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Revision tags: v5.15-rc1, v5.14, v5.14-rc7, v5.14-rc6, v5.14-rc5, v5.14-rc4, v5.14-rc3, v5.14-rc2, v5.14-rc1, v5.13, v5.13-rc7, v5.13-rc6, v5.13-rc5, v5.13-rc4, v5.13-rc3, v5.13-rc2, v5.13-rc1, v5.12, v5.12-rc8, v5.12-rc7, v5.12-rc6, v5.12-rc5, v5.12-rc4, v5.12-rc3, v5.12-rc2, v5.12-rc1, v5.12-rc1-dontuse
# 3afd0218 16-Feb-2021 Robert Hancock <[email protected]>

net: phy: broadcom: Set proper 1000BaseX/SGMII interface mode for BCM54616S

The default configuration for the BCM54616S PHY may not match the desired
mode when using 1000BaseX or SGMII interface mod

net: phy: broadcom: Set proper 1000BaseX/SGMII interface mode for BCM54616S

The default configuration for the BCM54616S PHY may not match the desired
mode when using 1000BaseX or SGMII interface modes, such as when it is on
an SFP module. Add code to explicitly set the correct mode using
programming sequences provided by Bel-Fuse:

https://www.belfuse.com/resources/datasheets/powersolutions/ds-bps-sfp-1gbt-05-series.pdf
https://www.belfuse.com/resources/datasheets/powersolutions/ds-bps-sfp-1gbt-06-series.pdf

Signed-off-by: Robert Hancock <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# 32aeba1f 16-Feb-2021 Florian Fainelli <[email protected]>

tg3: Remove unused PHY_BRCM flags

The tg3 driver tried to communicate towards the PHY driver whether it
wanted RGMII in-band signaling enabled or disabled however there is
nothing that looks at thos

tg3: Remove unused PHY_BRCM flags

The tg3 driver tried to communicate towards the PHY driver whether it
wanted RGMII in-band signaling enabled or disabled however there is
nothing that looks at those flags in drivers/net/phy/broadcom.c so this
does do not anything.

Suggested-by: Vladimir Oltean <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.11
# 5d4358ed 13-Feb-2021 Florian Fainelli <[email protected]>

net: phy: broadcom: Allow BCM54210E to configure APD

BCM54210E/BCM50212E has been verified to work correctly with the
auto-power down configuration done by bcm54xx_adjust_rxrefclk(), add it
to the l

net: phy: broadcom: Allow BCM54210E to configure APD

BCM54210E/BCM50212E has been verified to work correctly with the
auto-power down configuration done by bcm54xx_adjust_rxrefclk(), add it
to the list of PHYs working.

While we are at it, provide an appropriate name for the bit we are
changing which disables the RXC and TXC during auto-power down when
there is no energy on the cable.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Vladimir Oltean <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# 17d3a83a 13-Feb-2021 Florian Fainelli <[email protected]>

net: phy: broadcom: Remove unused flags

We have a number of unused flags defined today and since we are scarce
on space and may need to introduce new flags in the future remove and
shift every exist

net: phy: broadcom: Remove unused flags

We have a number of unused flags defined today and since we are scarce
on space and may need to introduce new flags in the future remove and
shift every existing flag down into a contiguous assignment.
PHY_BCM_FLAGS_MODE_1000BX was only used internally for the BCM54616S
PHY, so we allocate a driver private structure instead to store that
flag instead of canibalizing one from phydev->dev_flags for that
purpose.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Vladimir Oltean <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.11-rc7, v5.11-rc6, v5.11-rc5, v5.11-rc4, v5.11-rc3
# 8b86850b 06-Jan-2021 Florian Fainelli <[email protected]>

net: phy: bcm7xxx: Add an entry for BCM72116

BCM72116 features a 28nm integrated EPHY, add an entry to match this PHY
OUI.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew

net: phy: bcm7xxx: Add an entry for BCM72116

BCM72116 features a 28nm integrated EPHY, add an entry to match this PHY
OUI.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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Revision tags: v5.11-rc2, v5.11-rc1, v5.10, v5.10-rc7, v5.10-rc6, v5.10-rc5, v5.10-rc4, v5.10-rc3, v5.10-rc2, v5.10-rc1, v5.9, v5.9-rc8, v5.9-rc7
# 92ec804f 21-Sep-2020 Florian Fainelli <[email protected]>

net: phy: bcm7xxx: Add an entry for BCM72113

BCM72113 features a 28nm integrated EPHY, add an entry to the driver for
it.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew

net: phy: bcm7xxx: Add an entry for BCM72113

BCM72113 features a 28nm integrated EPHY, add an entry to the driver for
it.

Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.9-rc6, v5.9-rc5, v5.9-rc4, v5.9-rc3, v5.9-rc2, v5.9-rc1, v5.8, v5.8-rc7, v5.8-rc6, v5.8-rc5, v5.8-rc4, v5.8-rc3, v5.8-rc2, v5.8-rc1, v5.7, v5.7-rc7, v5.7-rc6
# b0ed0bbf 15-May-2020 Kevin Lo <[email protected]>

net: phy: broadcom: add support for BCM54811 PHY

The BCM54811 PHY shares many similarities with the already supported BCM54810
PHY but additionally requires some semi-unique configuration.

Signed-o

net: phy: broadcom: add support for BCM54811 PHY

The BCM54811 PHY shares many similarities with the already supported BCM54810
PHY but additionally requires some semi-unique configuration.

Signed-off-by: Kevin Lo <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# cc8a677a 14-May-2020 Kevin Lo <[email protected]>

net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810

Set the correct bit when checking for PHY_BRCM_DIS_TXCRXC_NOENRGY on the
BCM54810 PHY.

Fixes: 0ececcfc9267 ("net: phy: broadcom:

net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810

Set the correct bit when checking for PHY_BRCM_DIS_TXCRXC_NOENRGY on the
BCM54810 PHY.

Fixes: 0ececcfc9267 ("net: phy: broadcom: Allow BCM54810 to use bcm54xx_adjust_rxrefclk()")
Signed-off-by: Kevin Lo <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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# 11ecf8c5 13-May-2020 Michael Walle <[email protected]>

net: phy: broadcom: add cable test support

Most modern broadcom PHYs support ECD (enhanced cable diagnostics). Add
support for it in the bcm-phy-lib so they can easily be used in the PHY
driver.

Th

net: phy: broadcom: add cable test support

Most modern broadcom PHYs support ECD (enhanced cable diagnostics). Add
support for it in the bcm-phy-lib so they can easily be used in the PHY
driver.

There are two access methods for ECD: legacy by expansion registers and
via the new RDB registers which are exclusive. Provide functions in two
variants where the PHY driver can choose from. To keep things simple for
now, we just switch the register access to expansion registers in the
RDB variant for now. On the flipside, we have to keep a bus lock to
prevent any other non-legacy access on the PHY.

The results of the intra-pair tests are inconclusive (at least for the
BCM54140). Most of the times half the length is reported but sometimes
the length is correct.

Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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Revision tags: v5.7-rc5, v5.7-rc4
# e4e51da6 28-Apr-2020 Michael Walle <[email protected]>

net: phy: bcm54140: add second PHY ID

This PHY has two PHY IDs depending on its mode. Adjust the mask so that
it includes both IDs.

Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Andr

net: phy: bcm54140: add second PHY ID

This PHY has two PHY IDs depending on its mode. Adjust the mask so that
it includes both IDs.

Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

show more ...


Revision tags: v5.7-rc3
# 6937602e 20-Apr-2020 Michael Walle <[email protected]>

net: phy: add Broadcom BCM54140 support

The Broadcom BCM54140 is a Quad SGMII/QSGMII Copper/Fiber Gigabit
Ethernet transceiver.

This also adds support for tunables to set and get downshift and
ener

net: phy: add Broadcom BCM54140 support

The Broadcom BCM54140 is a Quad SGMII/QSGMII Copper/Fiber Gigabit
Ethernet transceiver.

This also adds support for tunables to set and get downshift and
energy detect auto power-down.

The PHY has four ports and each port has its own PHY address.
There are per-port registers as well as global registers.
Unfortunately, the global registers can only be accessed by reading
and writing from/to the PHY address of the first port. Further,
there is no way to find out what port you actually are by just
reading the per-port registers. We therefore, have to scan the
bus on the PHY probe to determine the port and thus what address
we need to access the global registers.

Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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