Eric Lee / smarc-uboot

01 Jan, 2019

1 commit

  • a2e99a71b   w1: Add driver for i.MX bus master controller ... Browse Code »

    Two variants of controllers are supported:
    V1 (bitwise only) found in
    i.MX21, i.MX27, i.MX31, i.MX51
    V2 (byte operations) found in
    i.MX25, i.MX35, i.MX50, i.MX53

    Only tested on i.MX53 hardware but in both modes
    (by modifying the device tree).

    Signed-off-by: Martin Fuzzey

    Martin Fuzzey
     

07 Dec, 2018

1 commit

  • b95938117   w1: fix occasional enumeration failure ... Browse Code »

    Sometimes enumeration fails (about 1 in 50 times on my custom board).

    The underlying reason is probably electrical but Linux does not have
    the problem.

    Comparing the Linux / u-boot implementations shows that Linux
    retries the error case whereas u-boot aborts early.

    Removing the early abort in u-boot fixes the problem.

    Signed-off-by: Martin Fuzzey

    Martin Fuzzey
     

01 Nov, 2018

1 commit

  • 65b60897a   w1: fix data abort if no one wire bus master present ... Browse Code »

    When the "w1 bus" command is used with no bus master present
    a data abort may occur.

    This is because uclass_first_device() returns zero, but sets the output
    struct udevice pointer to NULL in the no device found case.

    Fix w1_get_bus() to account for this and return an error code
    as is expected by the callers.

    Signed-off-by: Martin Fuzzey
    Reviewed-by: Eugen Hristev

    Martin Fuzzey
     

29 Sep, 2018

3 commits