Eric Lee / smarc-fsl-linux-kernel

30 Nov, 2018

1 commit

18 Jul, 2018

1 commit

  • 1323061a0   net: phy: sfp: Add HWMON support for module sensors ... Browse Code »

    SFP modules can contain a number of sensors. The EEPROM also contains
    recommended alarm and critical values for each sensor, and indications
    of if these have been exceeded. Export this information via
    HWMON. Currently temperature, VCC, bias current, transmit power, and
    possibly receiver power is supported.

    The sensors in the modules can either return calibrate or uncalibrated
    values. Uncalibrated values need to be manipulated, using coefficients
    provided in the SFP EEPROM. Uncalibrated receive power values require
    floating point maths in order to calibrate them. Performing this in
    the kernel is hard. So if the SFP module indicates it uses
    uncalibrated values, RX power is not made available.

    With this hwmon device, it is possible to view the sensor values using
    lm-sensors programs:

    in0: +3.29 V (crit min = +2.90 V, min = +3.00 V)
    (max = +3.60 V, crit max = +3.70 V)
    temp1: +33.0°C (low = -5.0°C, high = +80.0°C)
    (crit low = -10.0°C, crit = +85.0°C)
    power1: 1000.00 nW (max = 794.00 uW, min = 50.00 uW) ALARM (LCRIT)
    (lcrit = 40.00 uW, crit = 1000.00 uW)
    curr1: +0.00 A (crit min = +0.00 A, min = +0.00 A) ALARM (LCRIT, MIN)
    (max = +0.01 A, crit max = +0.01 A)

    The scaling sensors performs on the bias current is not particularly
    good. The raw values are more useful:

    curr1:
    curr1_input: 0.000
    curr1_min: 0.002
    curr1_max: 0.010
    curr1_lcrit: 0.000
    curr1_crit: 0.011
    curr1_min_alarm: 1.000
    curr1_max_alarm: 0.000
    curr1_lcrit_alarm: 1.000
    curr1_crit_alarm: 0.000

    In order to keep the I2C overhead to a minimum, the constant values,
    such as limits and calibration coefficients are read once at module
    insertion time. Thus only reading *_input and *_alarm properties
    requires i2c read operations.

    Signed-off-by: Andrew Lunn
    Acked-by: Guenter Roeck
    Signed-off-by: David S. Miller

    Andrew Lunn
     

01 Mar, 2018

1 commit

  • a9c79364d   phylink,sfp: negotiate interface format with MAC ... Browse Code »

    Negotiate the interface format with the MAC rather than requiring it to
    be a fixed type specified solely by the SFP module. This allows modules
    that can work with several different interface signalling formats to
    select a format compatible with the MAC - for example, a Fiber module
    supporing Gigabit ethernet and faster connected to a Gigabit only MAC
    needs to select the 1000BASE-X mode.

    Signed-off-by: Russell King
    Signed-off-by: David S. Miller

    Russell King
     

03 Jan, 2018

1 commit

16 Dec, 2017

1 commit

  • 259c8618b   sfp: add sff module support ... Browse Code »

    Add support for SFF modules, which are soldered down SFP modules.
    These have a different phys_id value, and also have the present and
    rate select signals omitted compared with their socketed counter-parts.

    Signed-off-by: Russell King
    Reviewed-by: Florian Fainelli
    Signed-off-by: David S. Miller

    Russell King
     

06 Dec, 2017

2 commits

  • c19bb0007   sfp: convert to fwnode ... Browse Code »

    Convert sfp-bus to use fwnode rather than device_node internally, so
    we can support more than just device tree firmware.

    Signed-off-by: Russell King
    Reviewed-by: Florian Fainelli
    Signed-off-by: David S. Miller

    Russell King
     
  • 0a6fcd3fc   sfp: add documentation for kernel APIs ... Browse Code »

    Add kernel-doc documentation for sfp kernel APIs, and link it into the
    networking kapi documentation under "Network device support".

    Signed-off-by: Russell King
    Reviewed-by: Florian Fainelli
    Signed-off-by: David S. Miller

    Russell King
     

07 Aug, 2017

1 commit